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Home My WebLink About100-195Explanation Page Permit Number 100-195 These well numbers (typically beginning with 100) precede the beginning of the Commission. No permits were issued and no formal folder of record (information) created. Information known to the Commission through other agencies, journals, reports, news or additional historical means has been collected and entered into a database of Well History information. If specific information exists, these pages may be filed in this folder. Occasionally, the information has been obtained from a report that may deal with a general area and many wells. If or when possible, we may be able to 'point' the person interested in this specific well to one or more of these information sources. However, at best, this will be incomplete and independent research should be conducted to locate, if available, further information about a particular well site. BLM Legacy Well Review — August 6, 2014 Notes on wells for file: Fish Creek #1 - irb /O0—/Oa Need to update schematic to actual casing depths. Verify fluids and fluid depth with Slickline at some point. Determine cement coverage in 7" casing . Well is near Mooses Tooth Development so could wait on more infrastructure to facilitate the P & A . Topagurak #1 />f-0 %oo" Pf 5' - Schematic needs to be corrected to reflect casing points , fluids etc. Has diesel lines buried for refrigeration... still holding fuel. May not be able to easily enter wellbore for drifting (no wellhead). No wellbore plugs are present. Large area of debris with a phantom cellar nearby. Thermistor cables seem to indicate there is most likely diesel in wellbore. East Toagurak #1 /00— IT & Schematic needs correcting. Not sure what fluid was left in wellbore... BLM report states frozen mud but couldn't find any verification in my research (last entry in drilling record said it was bailed to 1029' ft). Has 10 3/" stub sticking up for a "wellhead". Needs SL drift to verify fluid level and type. Skull Cliff Core #1 fpo— !J Z -- Schematic Schematic needs minor corrections and updates (show fish in wellbore at 527'md). This site has a great number of surface debris issues such as barrels and batteries. Fluid in wellbore is diesel but is in contact with the OH section of the well as casing is only set at 30'md. 7" casing stub with cap is "wellhead". No DST's were performed and no hydrocarbon shows ... Needs a Slickline drift to verify that diesel is still in place. SCOMgED OCT 012014. Legacy Wells Summary Report To paonr. . We l 1 r. 107' of - E 5!8' 7,'; I- r.:.nq ::j it, 116) rtr: titu::s Cr�l SeC �a0 1,1n1 7:, 1^ Vil' F1 r, h: c asii ir.. f3G to nt�y 620 sx o`'cr"e.rd 1 tic-- ;x f Ypa L' 1101 It 2C DO '1 1 3Ci�?f_i 'C V4' 12 IeEt Anve 9-ouna -iscr leve 40CL) t 3W' 55.Edo %-8 i i-ydril Iucn icirt v"U00 11 220 tax of O ;'i i.;Ac: Type C, 6373 ft • Operatkins t:eloW 6175' all in s;-:etrackec hole 0 rrtir,r. ft 1 u. CiJU f: 1, oao f' N .r. 1 G,.r,CS Figure 9: Topagoruk #1 wellbore diagram. Topagoruk #1 %cE t 2''U ci.,ls of dcr ,Tri bblb c -f tv.ne a^d 50 SY. of 7 pc-(', F! puirned Ihru -,Ii— .Joint htw, 13 21.-,81 k ' , 3','I' C83 r i::. Tr,. -)p -:i :'Ll' _,I 7,:i.' Dv C-fo69'00 -Icle plugged Imm 71=.4'tr• 6:37' we7C ex of Olympic curstr. ce-n. BLM Open File Report 127 • May 2013 493 Topagoruk#1 Legacy Wells Summary Report Figure 1: Aerial photo showing the components of the wide -spread Topagoruk #1 site. Figure 2: Thin, weathered metal lying on its side; this appears to have been a marker for the Topagoruk #1 well, but the base was smashed at some point. Thermistor cables stick up from the wellbore. 488 BLM Open File Report 127 • May 2013 290 EXPLORATION OF NAVAL PETROLEUM RESERVE NO. 4, ALASKA, 1944-53 .Specific gravity of some core samples from Topagoruk test well t Core Depth (feet) Lithology Specific gravity 63 7,804-7,814 Argillaceousglauconitesandstow -------------- 3.35 64 7,829 Siltstone--------------------------------------- 2.64 64 7,834 -----do----------------------------------------- 2.57 65 7,842 -----do----------------------------------------- 2.46 65 8,104 Shale----------------------------------------- 2.66 68 8,629 Siltstone--------------------------------------- 2.59 69 8,917 Clay shale----------------------------------- 201 70 9,202 -----do---------------------------------------- 2.69 73 9,441 Siliceous siltstone----------------------------- 2.68 77 9,504 -----do---------------------------------------- 2.62 79 9,540 ----do--------------------------------------- 2.67 82 9,817 Red siltatone--------------------------------- 2.72 83 10,007-10,017 Red chert conglomerate------------------------ 2.69 84 10,017-10,022 Red siltstone---------------------------------- 2.68 86 1%228 Chert conglomerate--------------------------- 2.71 as 10,394 -- ---do --------------------------------------- 264 90 10,440 Claystone------------------------------------- 2.68 95 10, 476 Chert conglomerate---------------------------- 2.63 OIL AND (SAS 01M AND GAS SHOWS Only a few slight shows of oil or gas were noted in this well by the Arctic Contractors personnel. The first found, a slight blow of gas from siltstone and sandstone at 5,959-5,988 feet, gave a maximum Baroid gas de- tector reading of 0.26 milliampere. A sample from 5,970 feet had a pale -yellow cut and yellow residue in carbon tetrachloride. (The rock was crushed, carbon tetrachloride was added, and the mixture shaken. Any color appearing in the carbon tetrachloride after settling and filtering was described as the cut; the residue is any material left in the evaporating dish after the liquid had evaporated.) Another sandstone, which fluoresced and had a gas odor and amber cut, was present at 6,140- 6,144 feet. Two samples from this sandstone were tested for fluid saturation in the ,Fairbanks laboratory, and one from 6,141 feet contained 4.81 percent of petroleum and 2.84 percent of basic sediment and water by volume; the other, from 6,143 feet, contained 3.08 percent of petro- leum and 2.15 percent of basic sediment and water. A third sandstone, from 6,498 feet, had a yellow cut and residue in carbon tetrachloride. FORMAT1iON TESTA Test 1, 5,960-6,052 feet. ---The Johnston formation, tester was set with an open -hole sidewall packer at 5,960 feet, with 91.72 feet of tailpipe and a %i6 -inch bean, It was open for 30 minutes, and a very slight blow --was recorded, but there was no odor of oil or gas. The fluid level remained constant for the 30 minutes and then dropped very suddenly. The packer was pulled out of the hole, and 2,600 feet of mud was recovered. The pressure was zero during the test, but rose to 3,700 psi when the packer failed because of the hydrostatic head. Test 2, 6,050-6,162 feet.—The Johnston formation tester with a casing packer was set in the 103; -inch cas- ing at 6,005 feet. A $i6 -inch bean and 27.40 feet of tailpipe were used. The tool was open 35 minutes; there was a moderate blow of air decreasing to a very slight blow at the end of the test. No oil was recov- ered; only 796 feet of drilling mud was recovered, of which 265 feet was cement contaminated. The salinity of the mud before the test was 60 grains per gallon, with a pH of 9.2; after the test the salinity of the mud recov- ered was 120 grains per gallon, and the pH was 11.0. LOGISTICS Supplies, equipment, and personnel were moved from the base camp at Barrow to the well site by tractor train and air. Prefabricated quonset and jamesway huts and wanigans, as well as heavy drilling equipment and supplies, were freighted overland during the winter, while planes, primarily C -47's, transported personnel and perishable or emergency supplies all year round. An airstrip big enough for such planes was constructed on a nearby gravel bar. A total of 4,700 tons of mate- rial was carried by the tractor trains, and 500 tons by air. Personnel.—A petroleum engineer, a geologist, and a drilling foreman served as supervisors at the rig. The crew consisted of 2 drillers, 2 derrickmen, 6 floormen, 2 firemen, 2 heavy-duty mechanics, and 1 oiler. Be- sides the crew, there were 2 tractor operators, 2 cooks, a kitchen helper, a janitor, an electrician, and a man who acted as oil -field warehousekeeper, timekeeper and storekeeper. Specialists in mud control, electric logging, diamond coring, cementing, and refrigeration, as well as carpen- ters, laborers, rig builders, and plumbers, were sent from the camp at Barrow when they were needed. Housing.—The camp constructed at the well site consisted of 6 quonset huts, 1 jamesway hut, and 8 wanigans. (A jamesway but is similar in shape to a quonset but is made of canvas over a metal frame and is usually slightly smaller. A wanigan is a small 1 -room building which lacks a foundation; it may be mounted on skids or runners to facilitate moving.) Three of the quonsets were used for sleeping, and the others for galley -mess, warehouse, and recreation. The james- way but and some buildings that were part of the tractor train were also used for sleeping accommodations. The wanigans housed the engineering and geological office, power supply, generators, boiler, mechanic's workshop, the water supply, radio equipment, and lavatory. Vehicles and heavy equipment.—Besides the tractors and airplanes that brought equipment, supplies, and personnel to the site, several other vehicles were used during drilling operations. These included 2 weasels TEST WELLS, TOPAGORUK AREA, ALASKA (military fully tracked vehicles), an LVT (landing vehicle, tracked), a small TD -9 crane (cherry picker), D8 and D6 Caterpillar tractors, the latter with a crane attachment; and a swing crane. The drilling equipment used by Arctic Contractors is given below. 1_ _ McCllntic Marshall 150 -ft steel derrick, type ODY, gal- vanized, with type YA frame window, 32 -ft base, and 11 -ft substructure. 1 _ -Ideal drawworks, type 125, with catheads on both sides, and Parkersburg Hydromatic brake. The catheads are Foster Air Master Breakout cathead with air controls, and Foster air spinner cathead, also with air controls. 3_ -General Motors 6 -cylinder quad, diesel engines, series 71, model 24103. 1 _ _ Byron -Jackson 300 -ton hook, Super Triplex "4300." I _ _ Martin -Decker weight indicator and Drillogger, consisting of recording type "D" weight indicator, recording mud - pump gauge, recording rate of penetration, and recording and indicating rotary -table tachometer. 2_ -Ideal slush pumps, type C-350. 1 _ Ideal 300 -ton traveling block, type 548 -TC. I _ _ Ideal 360 -ton crown -block type 648 -TU, with a 15 -in. cat - line sheave and an 18 -in. sandline sheave. I . -Ideal 200 -ton swivel, type RC -3. 1 _ _ Ideal rotary 20jJ-in, table, type SHS with table guard. I _ _ Ideal 300 -ton connector, type DA -30. 2. -Dlarlow mud pumps, model 445 HE, with 4 -inch double diaphragm, and a 5 -hp explosion -proof electric motor. 1 --Cameron blowout preventer, type QRC, series 1500, 10 -in. size, with 10,000 psi test and 5,000 psi working pressure. 1 _ _ Hydril blowout preventer, type GK, size 10, series 1500, with studded -face body, 10,000 psi test pressure and 5,000 psi working pressure. 1 _ -Shaffer blowout preventer, type 34, series 900. 1- _ Hydril autocratic accumulator unit for operating both Hydril and Cameron blowout preventors, model HB -17, with 90 -gal reservoir tank. 3_ _ Medearis mud suction tanks, with a capacity of 150 bbl. One tank with 2 Overstrom mud shakers, model MS 20-B, 54 by 60 in., each powered by 2 -hp Wagner electric motors. 1 --Halliburton cementing unit, type YP, with a Halliburton type AC pump. 1--Bulk-cement container, 200 -sack capacity. 1 _ _ Kewanee 50 -hp boiler, series 581. Fuel, water, and lubricant consumption.—Diesel oil and 72 -octane gasoline consumed as fuel totaled 463,862 gallons and 8,764 gallons, respectively; lubrica- tion required 3,016 pounds of grease, 3,719 gallons of thread -lubricating compound, 2,943 gallons of no. 9170 lubricating oil, 2,687 gallons of no. 9500 oil, and 1,456 gallons of Delo. The amount of water -used in drilling the bole was 3,743,000 gallons. DRILLING OPERATIONS RIG FOUNDATION Information presented in this section was recorded by John C. Bollenbacher, C. S. Roberts, R. A. Brooks, and Leonard C. Dickey, petroleum engineers. The foundation designed for the rig at Topagoruk 291 test well 1 consisted of 12- by 12 -inch timber sills set on ground scraped free of tundra vegetation. Refrig- erating pipes were fastened along the bottom of the timbers, to counteract the seasonal thaw and heat from the rig. A 675 -cubic -foot refrigeration unit was used to cool the diesel fuel circulated as refrigerant. Ther- mometers measured the temperature of the outgoing and incoming coolant, the circulating mud, the air temperature outside the righouse, and the -points of pressure underneath the timbers. The refrigerated sills made a satisfactory base for the rig, the only settling being under the mud pits, caused by the heat of the mud and the lack of air space between the pits and the timbers. Jacking the pits up once corrrected the slight lowering. The timbers under the mud pump also settled slightly, but the bumper hose connections allowed for a small misalinement of pipe. Heaters in- stalled on the blowout preventers deflected heat down- ward beneath the rotary table. Some settling from excessive thawing there, noticed after a year of drilling, was counteracted by installing additional supports with short piling into the permafrost a few feet away from the thawed area. No further deflection of the rotary table took place. DRILLING NO MS Other drilling activities are discussed below under the appropriate depth. Notes from drill records Depth (fed) Remarks 107 --------- Set 3 joints of 18% -in., 70 -lb casing to 106.91 ft, and cemented it with 89 sacks of Cal -Seal. Top two joints (60 ft) were jacketed with 24 -in. casing. 1,101 -------- Set 36 joints (1,101.6 ft) of 133 -in., 54.5-1b casing at 1,101 ft, and cemented it to surface with 620 sacks of standard portland cement and 180 sacks of oil -well type D cement. Water mixed with cement set from surface to 800 ft contained 10 percent of sodium chloride; water mixed with cement set between 800 and 1,101 ft con- tained 4 percent of calcium chloride. Jacketed 18% in. casing pumped dry and sealed while waiting for cement to set. Shaffer control valves installed, and well -head connection made. Casing tested with 700 psi for 15 min, with no loss of pressure. 1,142 _ Middle one of 3 drill collars failed, leaving one drill collas, tool joints, and bit in hole. Fish recovered on second attempt. 2,733 -------- Depth of the hole was corrected from 2,729 to 2,733 feet. 2,950-------- The 4 -in. kelly was replaced with a 6 -in. kelly. 3,968___ -------- Depth corrected from 3,970 to 3,968 ft. 4,689 -------- Sand bridge found at 1,660 ft, when going in hole to core. Hole reamed and nand bridge cleaned out. 292 EXPLORATION OF NAVAL PETROLEUM RESERVE NO. 4, ALASKA, 1944-53 Notes from drill records-Continued Notes from drill records-Continued Depth (fat) Remarks Depth (feel) Remarks 4,739-------- Tight spot found in the hole at 4,389 ft, while fishing tools were left in hole. After feeling for coming out of hole. fish unsuccessfully with drilling bit, top of it 4,848-------- On running in the hole, bit was worked to bottom, was located at 1,566 ft with an electric log. with some reaming, through a tight spot at Fishing tools recovered, but original fish 4,580 ft. remained in hole with top at 4,497 ft. After 4,866-------- Tight spot at 4,710 ft enlarged by working bit pumping a 25-bbl mixture of lubricating and and reaming. diesel oil down hole, fish was worked loose and 5,193 -------- Drill pipe stuck in hole at 1,710 ft, and spent a pulled out. Ten days required to recover it. week attempting to jar loose while lubricating Caliper survey was run, but instrument would with diesel oil, of which 787 gal. were used. not go below 4,500 ft. Record between 1,100 Drill pipe cut at 1,469 ft, and recovered from and 4,500 ft showed several tight spots. that depth, but the lower part could not be After reaming tight spots with bit 66 and a jarred loose. At end of second week of work, Grant 12Y4-in. reamer, set and cemented 1034- top of fish was lowered to 1,557 ft by cutting off in. 55.5-1b N-80 Hydril flush-joint casing at and pulling the upper 87 ft. After reaming and 6,073 ft, with 220 sacks of Olympic type-C cleaning out hole to 5,053 ft, the rest of the construction cement. Hole closed in for 18 hrs fish, which had fallen to the bottom of hole, under 900 psi pressure. Top of cement found was finally recovered 20 days after becoming at 5,036 ft. Twenty barrels of diesel oil and stuck. 20 bbl of brine made with 1,000 lb of salt were 5,268 -------- Drill pipe stuck again at 5,251 ft but was worked pumped through a circulating joint at 1,065 ft, loose. into annulus between 13%-in. and 10%-in. 5,587-------- Drill pipe stuck but was worked loose in 3 hr. casing, followed by 50 sacks of type-C construc- Several teeth broken from bit, which Globe tion cement. After 18 hr top of cement found junk basket did not recover when it was run at 796 ft. to bottom of hole. 6,348_ -_ _ _ _ _ Drill pipe twisted off again because of failure of 5,589 -------- Tight hole reamed for an hour, but after drilling mandrel in bumper sub. Fish recovered at to 5,621 ft, pipe stuck twice, and though it first attempt. was worked loose, hole had to be reamed again, 6,542_ _ _ _ _ _ _ Circulation lost while drilling through shale, and for an hour. was restored with a slurry of Aquagel, Fibertex, 5,780-------- Drill pipe stuck 3 stands off bottom but was and sawdust. worked loose. Wire -line core barrel hit. and 6,545 ------- Electric log between 6,040 and 6,544 ft showed drilled through a bridge 10 stands above a piece of metal at 6,280-6,313 ft. Caliper bottom of hole, and another one 2 stands log and second electric log with short electrode above bottom. spacing showed it to be bottom joint from 5,802 -------- After taking a core at 5,800 to 5,802 ft, circula- 10%-in. casing; it had become detached and tion was lost. Sixty gallons of viscous mud slipped down hole, which had been enlarged pumped to bottom of hole without regaining enough by caving to permit it to drop down. circulation; after 45 bbl of a 60-bbl mixture of Casing had not interfered with drilling up to mud containing 56 sacks of Aquagel and 32 that time. sacks of Jelflake was pumped in, circulation 6,940 ------- Drill pipe had to be worked and mud circulated was restored. Drill pipe was then worked for 2'q-hr to reach bottom, because of caving through a tight spot and hole cleaned out to shale. bottom. 7,009------- Caving shale again slowed drilling. 5,860 -------- Drill pipe worked through a tight spot which 7,042_ - _ - _ _ _ Four hours of reaming and working pipe were prevented electric logging equipment from necessary to reach bottom with the bit, because reaching bottom of hole on first attempt. of caving shale. Second run successful. 7,154 -------- Drilling stopped for several hours by high winds, 5,955 -------- Stuck pipe caused difficulty in reaming between and once for about 2% days while waiting for 5,780 and 5,955 ft. Aquagel. Fifty sacks of Olympic type-C con-- on--6,003____-___ 6,003 - Depth measurement corrected from 6,000 to struction cement was pumped into hole through 6,003 ft. drill pipe at 6,291 ft. After plug had set at 6,023 -------- Johnston formation tester stuck at 2,760 ft and 6;255 ft, whipstock was set at that depth. was pulled without making test. Tight spots Attempt to sidetrack hole (because of casing reamed with 12344n. bit 58, one of several bits at 6,280-6,313 ft) unsuccessful. After cleaning used primarily for reaming or cleaning out hole. out soft cement, hole was plugged to 6,197 ft 6,100-------- Drill pipe stuck and could not be pulled out of with 70 sacks of Olympic construction cement hole past a key seat at 2,840 ft. Pipe twisted and drilled out to 6,208 ft to make seat for off at 1,252 ft, leaving 1,588 ft of drill pipe, Eastman removable whipstock. Sidetracked collars, and bit. Two days later, the fish, hole drilled to 6,228 ft, and whipstock reset at which had fallen part way down the hole, was that depth, but this attempt to sidetrack hole pulled up to 1,270 ft, but bumper sub pin also unsuccessful. Hole plugged with 52 sacks wofked out of drill collar box, and fish and of Permanente construction cement (mixed TEST WELLS, TOPAGORUK AREA, ALASKA 293 Notes from drill records-Continued Notes from drill records-Continued Depa (fag Remarks Depa (fee) Remarks with water containing 2 percent of calcium Note________ Depth corrected from 8,710 to 8,714 ft. chloride), to 6,210 ft and drilled out to 6,215 ft. 8,733 -------- Circulation lost again between 8,726 and 8,737 ft, After third unsuccessful sidetracking attempt, but regained with mud mixed from 38 sacks of hole was plugged to 6,175 ft with 100 sacks of Aquagel, 126 of Baroid, 75 of StrataSeal, 21 Olympic construction cement, mixed with of sawdust, and 20 of Jelflake. water containing 3 percent of calcium chloride 8,809 -------- Hole took mud rapidly between 8,800 and 8,809 and heated to 80°F. Old hole successfully ft, but circulation regained when new mud was sidetracked from 6,175 ft, and drilling contin- mixed. Used all mud materials on hand.and ued in new hole, although tight spots in hole suspended drilling 3 days while waiting for had to be cleaned out at 6,120-6,125 and more Aquagel to complete mixing. 6,152-6,162 ft. Total of 55 days was spent 8,857 -------- Walls of hole became mudded while waiting for sidetracking and redrilling, from 6,175 ft to Aquagel, and circulation was maintained be- original total depth of 7,154 ft. tween 8,009 and 8,857 ft, but large amounts of Note-------- Operations below 6,175 ft all in the sidetracked caving shale caused tight spots in hole and hole. necessitated much cleaning out when attempt- 6,875 -------- Drill pipe again twisted off at 5,136 ft, leaving ing to get to bottom with a new bit. drill pipe, collars, and bit in hole, but were re- 8,862 -------- Cones from bit 134 were locked on pieces of junk /S covered in a day with bit undamaged. in bottom of hole. / 7,241 ........ Drill-collar pin twisted off, leaving 83 ft of drill 8,916 -------- Hole took 45 bbl of mud, and drilling stopped for r pipe and bit in hole, with top at 7,156 ft. about 2 days while awaiting new supply of After hours of intermittent reaming and circu- Aquagel for mixing a partial tank of new mud. lating mud, fish was recovered 4 days later, 9,150 -------- Between 8,930 and 9,035 ft, drill pipe stuck Caving shale and tight spots necessitated much several times, but was worked loose each time. cleaning out and reaming and made it difficult Caving shale and loss of mud also slowed to get bit to bottom. Raising mud weight re- drilling. duced caving but caused loss of circulation. 9,270 -------- Tight hole and caving shale caused pipe to stick 7,357 -------- Cement (100 sacks of Permanente type-C con- several times and necessitated a large amount struction cement) was pumped into hole of cleaning out. through drill pipe at 6,540 ft in order to seal 9,290_ _ _ _ _ _ _ _ Drilling shut down 3 days to repair suction lines rocks which were taking up mud and permit broken by settling of mud tanks. mud weight to be increased. Spent a week 9,336 -------- Depth corrected from 9,324 to 9,336 ft. Original cleaning out hole after cementing, removing depths are used in lithologic description. cement-contaminated mud, and treating mud. 9,434 -------- Diamond -core barrel stuck temporarily at 9,434 7,421 -------- A hundred sacks of construction cement pumped ft. in bole at 6,540 ft, plugging hole to 6,428 ft. 9,436 -------- Rate of penetration increased suddenly, and 56 After 50 sacks of Hi-Early cement were added, bbl of mud lost between 9,436 and 9,440 ft. pressure could be held at 850 psi (instead of 9,454_ _ _ _ _ _ _ Depth to bottom of core 74 corrected from 9,458 500 psi as before), giving the equivalent of a to 9,454 ft. column of mud weighing 95.3 lb per cu ft. 9,574_ _ _ _ _ _ _ After about 2 days of circulating mud and waiting Following 13 days were spent conditioning the for a junkcatcher, catcher was run in hole and mud, increasing its weight, and cleaning out recovered fragments of drill-bit teeth. shale bridges. 9,770_ _ _ _ _ _ _ Rate of penetration increased from 25 min per ft. 7,456 -------- Caving shale caused much difficulty in drilling, to 13 min per ft. and required much cleaning out. 10,051 ------ Cones came off rock bit. Next bit milled on 7,629________ Drill pipe stuck again when bit was at 7,520 ft them for 4 hr and was badly worn as a result when coming out of the hole but was worked of locked cones. When microlog equipment loose in 3 hr. Shale pontinued to cave while was run in hole, it stuck in tight spot at about hole was being cleaned out, but after Aquagel 8,600 ft and was left in hole. The 18-ft fish and Driscose were added to increase mud recovered after short wait for fishing tools. viscosity, condition of hole improved. After milling for 2 hr with a junk sub on a rock -------- Between 7,761 and 7,763 ft drilling progressed bit, numerous fragments of cones were very rapidly, and circulation lost immediately recovered. thereafter. Thick mud containing 24 sacks of 10,374------ Depth corrected from 10,372 to 10,374 ft. Aquagel and 250 lb of Jelflake was pumped 10,462 ------ Missing gauge teeth from rock bit recovered with through drill pipe at 7,745 ft, with only partial junk sub on another bit. returns of mud. Hole plugged back to 7,670 10,468 ------ Drill pipe stuck for an hour at 9,280 ft. ft with 50 sacks of Olympic construction 10,472 ------ Drilling suspended for 7 days while waiting for cement mixed with 30 cu ft of water heated more diamond core bits. to 80°F. Plug drilled out without losing 10,503 ------ Depth corrected from 10,506 ft. A 6-ft by circulation, and drilling resumed. 10Y,-in. riser installed on top of 10Y4-in. casing 8,714-------- Mud was lost occasionally, while drilling from with a coupling. It extended 3 ft above 8,330 to 8,714 ft. surface of ground. 294 EXPLORATION OF NAVAL PETROLEUM RESERVE NO. 4, ALASKA, 1944-53 DRILL AND CORE Brl'S A total of 227 drill bits were used on Topagoruk test well 1, beside a few unnumbered bits such as a Globe basket, Eastman rock bit, or a wire line core barrel and bit that deepened the hole a foot or two while cleaning it out. Over 50 Hughes W711 drill bits were used, and lesser numbers of other Hughes, Reed, and Security bits, ranging in size from 20% to 9% inches. Many of them (Nos. 65, 66, 80, 95, 97, 98, 101, 214, and 223), of various makes, were used entirely for reaming or cleaning out and consequently are not shown on the graphic log (pl. 17). Because they were used only to circulate mud, bits 226 and 227 were also omitted. Bit 7 acted as a pilot bit for bits 8 and 8a, bit 78 cleaned out cement, and bits 132 and 186 milled on junk. The Eastman 7',4 -inch rock bit mentioned above and a Reed 7% -inch bit ground down to 7% inches were used to start the sidetracked hole, drilling from 6,175 to 6,221 feet. Many of the bits used in drilling also did a large amount of cleaning out and reaming, especially between 4,200 and 9,500 feet. Except for 3 Security bits, all the 834 feet of coring was done by Reed conventional and wire line bits and by Christiansen diamond core bits. The former were 7% to 12Y inches in diameter, the latter, 9% inches across. Two of the Reed wire line bits did not take any cores; one, number 24, cored only cement and did some reaming, whereas the other, number 25, did not take a core because of the poor condition of the hole. The diamond core bits were used primarily to reduce drilling time per foot penetrated between 9,433 and 9,597 feet and from 10,384 to 10,503 feet; the rock consisted primarily of chert conglomerate and of hard sandstone and shale. Because of the sidetracked hole at 6,175 feet, the length of the Christiansen core barrel was limited to 30 feet. Two types of face -discharge diamond bits were used: model C -18—B was coarse -set with large bortz; the other, model B -18—B, had closely set fine bortz. The latter had a better rate of penetration, and 8 of the 10 bits were of this type. The rock recovered was 95.7 percent of that cored, although nearly vertical fractures occasionally caused difficulty by blocking the core barrel when drilling the sandstone and shale; pebbles from the chert conglomerate seemed to have a similar effect. Weight on the bit during coring varied from 8,000 to 25,000 pounds, rotary speed ranged from 30 to 70 revolutions per minute, and pump pressures, from 800 to 1,100 pounds per square inch, depending on the type of rock being drilled. DR.Ti.7"O MUD The drilling mud used in the upper part of Topagoruk test well 1 was a clay and water mixture which was dis- carded after setting the surface casing, because of cement contamination. Subsequently, the mud was treated with Aquagel to maintain proper colloidal properties, and quebracho and tetrasodium pyrophos- phate to regulate fluid loss, viscosity, and wall -building properties. When the hole was a little deeper than 3,000 feet, mud weight increased from 70 to 90 pounds per cubic foot; the temperature rose from 460 to 85°F; the viscosity remained at 40 Marsh funnel seconds; and the water loss decreased from 15 to 3.5 cubic centimeters per minute. Although viscosity increased to 55 Marsh funnel seconds just above 5,800 feet, cir- culation was lost at that depth and again at 6,003 feet; it was restored the first time by pumping in a very vis- cous Jelflake mixture and the second time after adding Aquagel. It was lost a third time at 6,542 feet, and regained after losing 206 barrels of fluid containing Aquagel, Fibertex, and sawdust; the mud weight was reduced to 70 pounds per cubic foot to prevent further loss. Plugging before sidetracking at 6,174 feet con- taminated the mud with cement, and it was treated with sodium bicarbonate and quebracho. Below 6,200 feet shale frequently caved into the hole, and a large amount of Baroid was added to increase the mud weight and thus furnish more support to the walls of the hole. This increased the water loss; so, the weight was reduced from 88 to 80 pounds per cubic foot, and Driscose was added to maintain low water Ioss. Contamination from the cement plugs continued to alter the desired mud characteristics, requiring the addition of more quebracho and acid pyrophosphate after cementing a zone at 6,542 feet to reduce loss of circulation and caving shale. Very large amounts of Baroid were again added to reduce sloughing by increasing mud weight to 90 pounds per cubic foot, and the viscosity was increased to 120-140 Marsh funnel seconds in attempting to remove a large quantity of caving shale from the hole. During and after cementing the hole again at 7,750 feet, tetrasodium pyrophosphate and Driscose were added to reduce circulation loss. Caving and lost circulation delayed drilling and re- quired the excessive use of additives, which were ex- pensive and difficult to keep in supply and transport to the well site. An expert on mud advised converting the fluid to a 15 percent oil -emulsion mud, which was done by adding crude oil from core tests near Cape Simpson to the system. Quebracho was added to control water loss; and caustic soda, to aid in keeping the oil in emulsion by increasing the alkalinity; the caustic also increased the gel strength and gel rate. Sodium bicarbonate was added each day to reduce the calcium ion concentration of the mud and to increase dispersion. These changes improved the mud charac- teristics, and caving ceased to be a serious problem. The following table shows the characteristics of the TEST WELLS, TOPAGORUK AREA, ALASKA mud and the materials added during drilling. The lists of additives have been compiled from several reports, and as there were a few discrepancies in the records, the following totals are approximate: 12,700 100 -pound sacks of Baroid and 3,800 100 -pound sacks of Aquagel, nearly 20,000 pounds of quebracho, 8,300 pounds of tetrasodium pyrophosphate, 5,500 pounds of acid pyrophosphate, 4,000 pounds of Driscose, 3,550 pounds 295 of sodium bicarbonate, 2,140 pounds of caustic soda, and 250 barrels of crude oil. Minor amounts of other materials-Fibertex, sawdust, Jelflake, and others, -- also were used. At several points in the hole Where fishing, mixing new mud, or other operations slowed the drilling, an unusually large amount of additives were used at a single depth. Drilling -mud dwracteristics and additives, Topagoruk test well T Depth (feet) Weight (Ib per eu ft) Viscosity (Marsh funnel see) Water loss (cc per So min) Temper- stare (°F) Aquagel (1001b sacks) Que brach. (lb) Baroid (100-1b sacks) Tetraso- diem pyro ph.sp)bate (-- Acid pyrophos- phate Ob) Sodium biearbon- ate (lb) Caustic soda (1b) Cmde oil (bbl) Duman 0b) Other additives 57- ---------- ---------- ---------- ---------- ----- 20 -----.--- lll----------- ------- 26 ---------- ------- --- ---------- ---------- ---------- ---------- 312 ......... 70.0 38 ---------- 45 25 ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- 59L-------- M0 38 ------ -__ 46 ---------- ---------- ---------- ---------- ----- ----- ---------- ---------- --------- ---------- 765-: -------- 7& 0 37 59 ----"»-- ---------- --•------- --------- ---------- ---------- ---------- ---------- ---------- 921...-------- 77,0 V ---------- 86 N ---------- --- ------- ---- ----- -------- ---------- ---------- ---------- -----'---- 1M4--------- 59.0 49 1&b a ---------- as ---------- 56 ---------- ---------- ---------- --------- ---------- 1,100 --------- 80.0 49 1&0 M ---------- ---------- ---------- ---------- ---------- ---------- ------- --- ---------- ---------- IIM6 --------- ------ ---------- ---'-- ------ is ------ ----- ------ ------- -----' -------- ---------- ---------- 11145 --------- 60.0 a 1&0 51 ---------- ---------- ---------- ---•------ ---------- ---------- ---------- ---------- ---------- 1,222-------- 71.0 >0 14.0 a ---- ------ ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- 1 2 ------ ---------- -------- ------'--- ---------- ---------- 19 ---- ----- 10 --'------- ---------- --------- ---------- ---------- 1,467 --------- 710 40 1&0 59 ---------- --------- --------- ---------- ---------- ----- ----- ---------- -•-------- ------- --- 1,604 --------- 71.0 38 13.0 67 ------ ------ ------ ------ ----•- ---------- -----'---------- ------ 1.800 --------- 74.0 40 12.0 88 -----• ------ -----' ----- ------ ------ -------' ---------- ---- ». 2,096----...« 780 37 9.0 65 ---------- ---------- ---------- ---»----- ---------- -r----»- ---------- ---------- ---------- 2,200-----»» 7&0 42 9.0 72 ---------• 10 ---------- 10 ----- -'--- ---------- ---------I --------- ---------- 2,%2-----»» 50.0 8s 6.0 74 --- ------- --------- ---------- ---------- ---------- ---------- --------- --------- ---------- -------_.2,342--------- 2,342 --------- --'------- ---------- ---------- ---------- 6 ---------- ---------- ---------- - %390--------- 82.0 89 6.0 74 ---------- ---------- ---------- ---------- ---------- ---------- --------- ----- ----- ---------- 2,462-------- 84.0 42 5.5 75 ---------- ---------- ---------- ---------- ---------- ---------- ------- --- ---------- ---------- 2,525 ------ 8%0 43 4.5 76 _»__».» 26 ---------- 25 _ 2,630.----- 86.0 40 3.0 81 ------- 50 ---------- U _ ---------- 2,692 ...... 86.6 41 3.0 76.----- ---- ' ------ ------ ------ -----• ----- ---------- .-----. 2,729------- ------- -------- ----- ----- ---------- 10 ------ 10 ---------- - ----- ---•-- ------ ---------- 2,700 --------- 87.0 43 & 0 74 9 ---------- ----•----- ---------- ---------- ---------- --»----- ---------- ---------- 2,800--------- ---------- ---------- ---------- ---------- 72 10 ---------- 10 ---------- ---------- ---------- ---------- ---------- 2,828-------- 86.0 48 &5 82 ---------• ---------- --------- ---------- ---------- ---------- ---------- ---------- ---------- 2,921--------- 87.0 42 &5 88 ---------- 5 ---------- 6 ---------- ---------- ---------- ---------- ---------- 2,950--------- 87.0 43 &S 87 ---------- ---------- ---------- --- ------- ---------- -------- ---------- ---------- ---------- 3,016--------- 87.0 42 3.0 Be ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- 3,086 ------ ». 87.0 42 3.0 75 ---------- ---------- --------- ---------- ---- ----- ---------- ---------- ---------- ---------- 3,165 --------- 87.0 42 3.0 83 ------ ---- ---------• ----- ----- ---------- ---------- ----- ----- ---------- --------- ---------- 3= --------- 8&0 43 2.5 80 ------^--- -------•-- 28 ---------- ----- -'--- ---------- ---------- ---------- ---------- 3,413---_-.-.. 89.0 42 3.0 86 ---------- 10 ---------- ---------- ---------- --------- ---------- ------.-- --'------- 3,538--------- 89.0 43 3.0 91 --------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- 315M--------- 85.0 38 3.0 84 ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- 3,621------ 87.0 38 3.6 00 ...-- ---------- ----- - ---' ------- ------- - ------ ---------- - ------ 3,761--------- s& 0 30 3.0 89 ------' -' ----'---- ---------- ------»- --------- -------»- ---------- --------- •-------- 3.806--------- 87.0 39 3.0 85 --------- -------'-- ---------- ---------- ---- ------ --- -'----- ---------- --------- ------- -- 8,890--------- 97.0 39 3.5 78 ---------- ---------- 4 3.936--------- 86.0 39 3.0 73 --- -'----- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- 41009 --------- 86.0 38 4.0 s0 ---------- -- -'------ 3 ---------- ------- --- ---------- -'-'------- ---------- ---------- 4,069--------- 8& 0 30 4.0 84 -_-_- - _---___--_ 6 _ 4,110 --------- 86.0 40 4.0 82 --------- ------- -. 12 ---------- ---------- --------- --- ».--•- ---------- --'------- 4,175--------- 87.0 41 3.5 80 ------- 2 ---------- ---------- -»------- ---------- ---------- ---------- ---------4,200-----.-» 4,M ------- - 88.0 40 3.6 8D --- ------ -------»- --------- ---------- -----•---- ---------- ----•----- ---- ------ ---------- 4,240 ------ »- ---------- ---------- ---------- ---------- ---------- ------- 5 ---------- ----- ---- -------- ---------- ---------- ---------- 4,3M --------- 8& 0 40 4.0 82 ---------- -----»-. 18 ---------- ---------- ------ ---- ---------- ------- '-- ---------- 4,318-------- 8&0 41 4.0 82 ---------- ---------- 8 ---------- -------- -------•-- ---------- ---------- --•------- 4,418-«.»-« 87.0 38 4.0 93 ---------- ---------- ---------- ----- ----- ---------- ------- --- ---------- --------- ---------- 4,478 ------- -- S&O 39 4.5 86 ---------- ---------- ---------- ---------- ----- ----- ----- '---- ---------- ---------- --'------- 4,644- .... .». 8& 0 3s 4.5 86 6 •----•---- 6 ---------- ---------- ---- ------ ---------- ---------- ---------- 4+--'- 87.0 40 4.0 82 ------- --------- -- ----- ---- -----' -- -•---' ---•- - ------ ---------- ------ 4,635.-.__. 4,635 ------ 8& 0 39 4.5 84 _____ _---- » ---- 14 --« ---------- --»--- --------- - -------- ---------- ----»4,669-----» 4,M9 ----- 87.0 40 5.0 82 ---------- ---------- 7 ---------• --------- --- ------- ---------- ---------- ---------- 4,686 ----- »_. 88.0 40 &0 80 _ --- -20 .-_ ---2D --- -----_ 4,689------- 89.0 43 3.5 84 ---------- 30.- « -----' -------- »»_ 4.692--------- --------- ---------- ---------- ---------- ---------- 86 ---------- in -------- --------- ---_.._._ - _...». o>r r • THE STATE Department of Environmental 011-1LASKL'1 GOVERNOR SEAN PARNELL RECEIVED FEB 0 7 2014 February 4, 2014 A0GCC Certified Mail, Return Receipt Requested Article No.: 7012 2210 0002 1216 2391 Wayne Svejnoha BLM — Division of Resources 222 W 7th Ave, #13 Anchorage, Alaska 99513 Conservation Division of Spill Prevention and Response Contaminated Sites Program File: 320.38.010 SCANNED 0 2 2014 Re: Potentiall Responsible Party Notice Letter and Information Request NPRA Legacy Wells - General Hazard ID: 26125 Ledger Code: 14339387 Dear Mr. Svejnoha: 610 University Ave. Fairbanks, Alaska 99709-3643 Main: 907.451.2181 Fax: 907.451.5105 This letter is to advise you that the Alaska Department of Environmental Conservation (ADEC) has identified the 136 legacy wells within the National Petroleum Reserve in Alaska (NPRA) as potential contaminated sites. Some of these wells require extensive cleanup of oil and other hazardous substances released to the environment. Since you are identified as a current or past owner and/or operator of these sites, please be advised you may be financially responsible or liable for the investigation and /or cleanup of any hazardous substance contamination that might be present. Alaska Statute 46.03.822 establishes who is liable for contamination. Records available to the ADEC indicate that you meet one or more of the following criteria: » owned or controlled the hazardous substance at the time of its release; » own(ed) or operate(d) the property or facility from which the release occurred; » owned or operated property at which the hazardous substance came to be located; and » arranged for transport, disposal or treatment of hazardous substances that were released. Site History From 1944 through 1982 the US Government drilled 136 wells to explore for oil and gas resources in the NPRA. It is our understanding that other federal agencies and some private companies may have operated or managed these sites in the past. We have also been informed that 23 of these well have been conveyed to public and private entities. The ADEC currently lists 14 of the 136 legacy wells on our database of contaminated sites. The Bureau of Land Management (BLM) is identified as the responsible party for the following sites. Wayne Svejnoha 0 2 February 4, 2014 • BLM Cape Halkett Drill Site (File # 300.38.108) • BLM East Simpson #2 (File # 300.38.109) • BLM East Teshekpuk Drill Site (File # 300.38.110) The U.S. Army Corps of Engineers, under the Formerly Used Defense Sites program, is working with ADEC under the Defense States Memorandum of Agreement on cleanup actions at the 11 Umiat test well sites. BLM is identified as the landowner in our records, and as such is identified as a potentially responsible party in addition to the Department of Defense: C Umiat Test Wells 1-11 (File # 335.38.001) The information contained in these files is part of the public record. Our databases are accessible on the Internet at: http://dec.alaska.gov/spar/csp/db_search.httn Additional Actions Needed ADEC sent a letter on July 11, 2013, identifying an additional 15 legacy well sites with confirmed releases (enclosed). As stated in the letter, ADEC recommends that BLM develop a plan to address known, suspected, and unknown releases at the legacy well sites, in coordination with the appropriate regulatory agencies. We expected a response to this letter before now. Please respond to this letter within 30 days. After we receive and review your response we will determine what additional actions will be taken regarding each site with known or suspected contamination. In addition, with your response, please complete and return the enclosed questionnaire requesting more information about past operators. In accordance with Alaska Statute Title 46, ADEC is authorized to provide regulatory oversight for any contamination response efforts initiated by the responsible party. However, if response actions by the responsible party are not satisfactory to ADEC, we may then assume the lead role in the investigation and cleanup efforts. In the event that State response actions are necessary, the responsible parties may be held financially liable for any response actions taken by the State. Alaska Statutes 46.04.010 and 46.08.070 establish cost recovery procedures for certain costs, including oversight activities, incurred by the State in responding to pollution incidents. If you are determined to be a responsible or liable party, ADEC may bill you at a later date for our expenditures associated with this pollution incident. Expenses for which we may seek reimbursement include: Staff time associated with general or technical assistance; work plan review; project oversight; general project management; legal services; interest; travel; equipment and supplies; and any contracting costs. Pursuant to Alaska Statute 46.08.075, the State may also file liens against all property owned by a person who is responsible or liable for State expenditures. Please respond in writing within thirty (30) days from the date of this letter addressing your intended actions with respect to this pollution incident. If you believe someone else is responsible for this pollution incident (e.g., a past owner or operation of the site) or if you have any questions concerning this matter, please contact Mr. Fred Vreeman at (907) 451-2181. The attached "ADEC Information Request" describes the minimum information expected in your response. Additional information may needed to evaluate the risks and responses required at each legacy well site. Sincerely, Fred Vreeman Environmental Program Manager G:\SPAR\CS\Contaminated Site Files (38)\320 National Petro Reserve Area\320.38.010 NPRA Legacy Wells General\2-2-2014 Letter\PRP Letter All Wells.docx Wayne Sveinoha Enclosure: 0 3 • ADEC Information Request Concerning Contaminated Sites BLM Legacy Wells Dispute letter date July 11, 2013 February 4, 2014 cc: Bud Cribley, Director, Bureau of Land Management Steven Cohn, Deputy Director, Bureau of Land Management Jolie Pollet, Branch Chief, Bureau of Land Management Robert Brumbaugh, Geologist, Bureau of Land Management Michael McCrum, Environmental Engineer, Bureau of Land Management Larry Hartig, Commissioner, Alaska Department of Environmental Conservation Lynn Kent, Deputy Commissioner, Alaska Department of Environmental Conservation Kristen Ryan, Director, Alaska Department of Environmental Conservation Lori Aldrich, Program Manager, Alaska Department of Environmental Conservation Steve Bainbridge, Program Manager, Alaska Department of Environmental Conservation Jennifer Roberts, Program Manager, Alaska Department of Environmental Conservation ADEC Response Fund Administration GASPAR\CS\Contarr nmted Site Files (38)\320 National Petro Reserve Area\320.38.010 NPRA Legacy Wells General\2-2-2014 Letter\PRP Letter All Wells.doe% 0 0 ADEC INFORMATION REQUEST Concerning a contaminated site(s) Re: Legacy Well Sites in and near the National Petroleum Reserve, Alaska (NPRA) Please precede each answer with the number of the question to which it corresponds. Please direct any questions concerning this information request to Fred Vreeman, Contaminated Sites Program, 610 University Avenue, Fairbanks, AK 99709; Phone: 907-451-2181. Thank you for your cooperation. 1. Provide name and company affiliation of the person answering the questionnaire. 2. Provide copies of all studies, reports, and supporting information (including preaquisition assessments and work done on behalf of other parties) which you have knowledge of which address past and/or present environmental conditions at the site. Identify the name, title, address, and phone number of the party(s) who are responsible for preparing the studies or information. Information which has been previously submitted to ADEC need not be submitted again (unless specifically requested in a subsequent communication) if you can provide the name of the office (and name and title of the DEC officer if known) to whom the report was previously provided. 3. Provide a description of any ongoing or planned investigations or cleanup work at the site. Identify the names, titles and phone numbers of the individuals responsible for preparing the studies or information. 4. Provide a description of known releases at the site (date of occurrence, quantity released, type of substance released, etc.) and a description of corrective measures that were taken. Provide information on any suspected releases which may have or are occurring. 5. Describe the nature of past and present operations at the site. In particular, any actions that may have caused the release or threat of release at the site. Describe the physical characteristics of the site including major structures, water wells, fuel or waste storage systems, drainage or septic systems, etc. 6. Provide a list of any permits issued by the Department which relate to activities at the site and a list of RCRA identification numbers (U.S. EPA identification numbers) which may be held. 7. Identify persons to whom you leased all or a portion of the property and describe the nature of their operations. 8. Identify the person(s) who used the site for disposal of substances deposited there, if any. 9. Provide copies of manifests for any hazardous waste and/or petroleum contaminated materials taken to or from the site. 10. Provide a list of persons and their phone numbers and addresses of persons who have knowledge about the use of hazardous substances at the site. 11. Provide information regarding the existence of insurance coverage for damages resulting from releases of hazardous substances and copies of all such insurance policies, both currently in effect and in effect during the periods of activity in question. 12. Describe the acts or omissions of any person, other than your employees, agents, or those persons with whom you had a contractual relationship, that may have caused the release or threat of release of hazardous substances at the site. a. In addition, describe all precautions that you took against foreseeable acts or omissions of any such third parties. 13. Describe the care you exercised with respect to the hazardous substances found at the site. 14. Describe the physical characteristics of the site including structures, wells, drainage systems, etc. THE STATE July 11, 2013 'ALASKA GOVERNOR SEAN PARNELL Wayne Svejnoha Supervisory Minerals & Energy Specialist 222 W 7th Avenue, #13 Anchorage, Alaska 99513 Re: BLM Legacy Wells Dispute Dear Mr. Svejnoha: Department of Environmental Conservation Division of Spill Prevention and Response Contaminated Sites Program 610 University Ave. Fairbanks, Alaska 99709-3643 Main: 907.451.2181 Fax: 907.451.2155 The Alaska Department of Environmental Conservation (ADEC) — Contaminated Sites has reviewed the National Petroleum Reserve in Alaska: 2013 Legacy Wells Summary Report dated February 2013, containing updated information on the status of the 136 Legacy Wells located in the National Petroleum Reserve — Alaska (NPR -A), and the draft National Petroleum Reserve in Alaslm. 2013 Legacy Weiss Strategic Plan dated May 2013. ADEC has also reviewed the response by the Alaska Oil and Gas Conservation Commission (AOGC). We concur with the response by ACIGC and have no further comment regarding the priorities. We do have comments about the investigation and cleanup plans presented in the report. With this letter we arc outlining regulatory requirements related to the environmental work that is proposed and required as part of these cleanups. ADEC is concerned that the 2013 Legacy Wells Strategic Plan prepared by the BLM does not include either assessment of the contingency for assessment of known, likely, or unknown but possible contaminant releases. In addition, BLM plans for surface cleanup of these wells should be made clear in the plan. At least one of these legacy wells has extensive PCB contamination and has resulted in a multi-year cleanup totaling tens of millions of dollars. At others, solid waste disposal practices have resulted in releases to the environment with estimated cleanup costs in the hundreds of millions. Known releases documented in the records we reviewed include crude oil, gasses, refined oil and fuel, drilling fluids that include various organics, metals, and other chemicals, and unknown contaminants from drums and other containers observed to be damaged and abandoned at the various well sites. There are 13 legacy well sites with known releases currently on the DEC contaminated sites list. Many of these are in the process of being addressed, cleaned up, and closed. From our Waited records review there are 15 additional legacy well sites with confirmed releases. These should be prioritized for initial records reviews and then added to the BLM contaminated sites list under our cooperative agreement. Suspected releases include fuel releases from operations, storage, and fuel spills at the sites, impacts to various surface water bodies from spilled fluids during drilling and breaches of containment at reserve and flare pits, continued surface runoff from drilling fluids uncontained at several sites, and down -hole substances that were ejected from the holes over time or during blowouts or drilling operations. 1 Wayne Sve noha ? July 11, 2013 Y The.BLN-1 plan to address these known, suspected, and unknown releases at legacy well sites is notably absent from the documents presented to date. The three primary regulatory agencies that need to be involved in the plan are ADEC — Contaminated Sites, Alaska Oil & Gas Conservation Commission, and ADEC — EH/Solid Waste. Other agencies will need to be consulted. as well. Below we provide recommendations for a coordinated plan using the Uniform Federal Policy for Quality Assurance Project Plans (UFP-QAPP) that will involve all of the regulatory agencies in one coordinated manner. This will allow BLM to address these sites in a consistent and coordinated project which fulfills all of the regulatory requirements so that the sites do not need to be re -visited in the fu=e xvhen they are closed after this project. Attached are our comments on each specific well. The acronyms used on the list include terms that are typically used in a CERCLA type investigation however they are also suitable for investigations conducted under the State of Alaska cleanup rules. These include the following; Historical Records Review (HRR) 'chis is recommended for almost all of the well sites. Much of the information required for these reviews is already contained in various reports and appendices or in BLM files. The Historical Records Review should document the type of releases that might have occurred from drilling operations as well as historical use of the site, and should capture all available information on the drilling fluids used and any product produced or released. Preliminary Assessment (PA) This is recommended for almost all of the well sites. A Preliminary Assessment is a limited scope investigation that provides an assessment of information about a site and its surrounding area to distinguish between sites that pose little or no threat to human health or the environment and sites that require further investigation. The PA is a CERCLA defined document and typically does not require sampling. Site Inspection (SI) If the PA recommends further investigation, then an SI is necessary. The SI is a CERCLA defined document, and it is analogous to an initial report of contamination under state cleanup rules. On some legacy well drillings sites it is evident now that an Sl is required just from a review of the reports. An SI investigation typically includes the collection of samples to determine what contaminants are present at the site and whether they are being released into the environment. An approved site specific workplan is required under both CERCL-A and 18 AAC 75 prior to SI sampling. The SI typically is not intended to develop a full site characterization, but is limited to determining the presence or absence of a release. If contamination is found after completion of the HRR, PA, and SI then a RI/FS under CERCLA, or a Site Characte-rizatiowlteportandcleanup-Alas,under-l-fi-AAC7iis`required. -- ----- - -- — --------- - DEC recommends that BLM incorporate into the strategic pian the processes outlined in this letter. A team of agencies composed of AOGC, DEC -CS, EPA as required, and DEC -EH should address regulatory and technical requirements for these well closures. By cooperating and working together with the regulatory agencies BLM will save time and expense, and regulatory uncertainties will be avoided. The strategic plan should reference a project to prepare a generic workplan. DEC suggests that BLM utilize the generic UFP-QAPP workplan format for the required environmental work. If properly prepared, the workplan could encompass most of the investigations and cleanups required at these sites over multiple years. At other multi -site projects we have found this to be an effective way to reduce uncertainties and risk in these types of investigations. A very small site specific FSP could then be developed as BLM approaches each drilling site. Regulatory decisions made during workplan development would provide more certainty in the planning process for cleanups. G:\SPAR\CS\federal F2cilitie3\Ci%ih2n 1-cdcrrt Agr=ics\DOl\B[.Ni\1'roiens\lxgAey Wells\7 11 13 Luter to KIN on lxbxy wells.doex Wayne Svejnoha 3 0 July 11, 2013 Please review the attached list of specific sites. If you have any questions, please do not hesitate to call me at 907-451-2181 or by email at fred.vreeman@alaska.gov. I look forward to working with you as the Federal Government fulfills its requirement to clean up these well drilling sites in Alaska. Sincerely, y' Fred Vreeman Environmental Program Manager Enclosure: SPAR Response with Legacy Wells cc: Bud Cribley, State Director, Bureau of Land Management Steven Cohn, Deputy State Director for Resources, Bureau of Land Management Jolie Pollet, Branch Chief, Bureau of Land Management Robert Brumbaugh, Geologist, Bureau of Land Management Michael McCrum, Environmental Engineer, Bureau of Land Management Cathy Foerster, Commissioner, Alaska Oil and Gas Conservation Commission Larry Hartig, Commissioner, Alaska Department of Environmental Conservation Kristen Ryan, Director, ADEC Division of Spill Prevention and Response Steve Bainbridge, Program Manager, ADEC Contaminated Sites Program Jennifer Roberts, Program Manager, ADEC Contaminated Sites Program GASI'AR\CS\Fedcrrl Fo61ibLy\Gvi6n Falctul AgcnnCs\DOI\BI.N1\Proitcts\lA'6.1' q W03\7 11 1314tur to Aim\I on Ug2cy Wclls.doex Well Name operator I RP I Land Simpson Core Test #5 1! Na 1 BLM Simpson Core Test #6 US Na I BLM Simpson Core Test #7 us Na 1 Bl. M Sin son Core Test 98 US Navy 113LM Si son Core Test #9 U5 Na I BLM Sinwson Core Test #1f) U.S Navy! BLM Core Test #11 AOGCC Subsurlaca I BLM Core Test #12 FUSNa a I BLM Core Test #16 a I BLM Core Test #17 US Na 1 BLM Core Test 018 US Na I BLM Core Test #19 US Na 1 BLM t Core Test #20 US Navy 1 BLM i Gore Test #21 2S Na 1 BLM I Core Test #22 US Na 111•LM I Core Test dnlf fluids left in hole i BLM Core Test �#2vy I BLhA n CareTest #25 US Na Y I BLM K Core #1 US Navy i BLM 1 -t- *1 SPAR Response with Legacy Wells Lisl.xlsx 2013 Risk Ity CSP Status I Fito tllHazid Rolea5e7 Nnne f+lone IYOMWil Low RNooe ane None Unused, Unused, I None Unused, i None Uncased, None None None None (None Unknown Unknown Page 1 of 14 •I AOGCC Subsurlaca AOGCC Surface SPAR W arkgroup Notes Status Status Need HRR, PA, S1 no data no data Need HRR. PA. SI no data no data Need PA ind drill fluid assessnsenl & workplan drillin 11uids left in hole no data Need PA ind drill fluid assessment & work an drilling fluids left in hole no data Need PA incl drill Ifusd assessment & work Ian dnlf fluids left in hole no data Need PA ncf drill fluid assessmcnf &work Ian dnllxs fluids tett rn hale no data well skelch provided by Need PA ind drill fluid BLM not consistent with assessment & work Ian AOGCC or BLM data no data Need PA ind drill fluid assessment & work Ian dnflin fluids left in hole no data Need PA and 51 ind 13611 fluid assessment. workplan rid sampling stressed debfis, partially as blowout and fire rove elated site areas Need PA incl drill fluid assessment & workplan dn lling fluids left in hole no data geed PA ind drill fluid assessment & wOTk Ian drij I ing fluids teff in hole no data Need PA incl dfifl nutd assessment & work Ian drillin fluids left m hole no data Need PA incl drill fluid assessment & work Ian drillin ituids left in hole no data Need HRR. PA, SI no data no data Need PA incl drill fluid assessment & work Ian drillin fluids felt in hole ria data Need PA incl dnll fluid assessment & work larx drillin fluids left in hole no data Need PA incl drill fluid assessment & work Ian drillin fluids Teff in hole no data Need PA ind dnll fluid drflfing fluids and ball assessment & Workplan peen hammer left in hole no data overshot, drill collar, rock revegelated —131 Need HRR, PA bit, and N -reds left in hole can't find it Review Report as PA. No evidence of sheen, stressed veg, or drilling Not abandoned, waste on surface. Veg ----_— , ,raw,, plunaed to surface site not cleared •I SPAR Response with Legacy Wells LisLxlsx Page 2 of 14 is • vi nce o BLM 2013 Risk Historic AOGCC Subsurface AOGCC Surface Well Name Operator I RP I Land Mgr Priority CSP Status file #IHazid Release? SPAR Workgroup Notes Status Status plugging operations inadequate and Wellhead tell as Umiat 43 US Navy I BLM I FUDS None pending dos 335.38.00113092 Yes. see file 'Plugged by BLM in 2004 incomplete historic site? plugging operations inadequate and Wellhead left as Umiat #4 US Navy I BLM / FUDS None pending dos 335.38.001!3079 Yes, see file Plugged by BLM in 2004 incomplete historic site? plugging operations inadequate and Wellhead left as Umial 98 US NaMy I BLM I FUDS None pendinq dos 335.38.001/3D81 'Yes, see_ _file Plugged BLM in 2004 incomplete historic sile? plugging operations inadequate and Wellhead left as Umiat #1'0 US Navyj BLM_I FUDS None pendingdos 335.38.00113082 Yes, see fila Plu ed by BLM in 2004 incomplete historic site? Need HRR, PA, SI with sampling. Drilling mud assessment. Surface Plugged to 7868'. Drilling Cleanup. Photos - evidence mud and diesel to Awuna #1 USGS I BLM Medium None None Yes of erosion into lake surface. > 100 _Pylons Need HRR, PA, SI with sampling. Drilling mud Wood , metal, assessment. Surface Plugged to 2039'. Diesel plastic debris. Fast Simpson #1 USGS I BLM Low None None Yes Cleanup. to surface. >10D Pylons Need HRR, PA, SI with Wood and metal Drilling mud assessment debris. Pylons - Photos straw areas of no Plugged to 2047'. Diesel Tankage for lk ' #1 USGS / 8LM Low None None Yes ve elation. to surface. flammable fluids Need HRR. PA, SI wdh sampling. Drilling mud assessment. Surface Plugged to 1400'. Drilling Wood and metal Koluktak #1 USGS I BLM Low None None LYes Cleanup. mud & diesel to surface debris Pylons Need HRR, PA, SI with sampling. Drilling mud assessment. Surface Plugged to 1894'. Diesel Wood and metal Ku am 91 USGS I BLM Low None None Unknown Cleanup. to surface debris. Pylons Need HRR, PA, Sl with sampling_ Drilling mud assessment_ Surface Plugged to 4464'. Drilling Wood & metal Kuyanak #1 USGS I BLM Low None None Yes Clean mud & diesel to surface debris. Pylons Need HRR, PA, SI with sampling. Drilling mud assessment. Surface Cleanup. Photos show Plugged to 1840'. Diesel Plastic and metal Lisburne 41 USGS I BLM Low None None Yes stained soil to surface debris. Need HRR, PA, SI with sampling. Drilling mud assessment. Surface Plugged to 8192'. Drilling Wood and metal North Iii ok $1 USGS I BLM Low None INone Yes Cleanup. mud & diesel to surface debris - Page 2 of 14 is • Well Name Peard South Meade #1 1 RP 1 Land 1BLM BLM #1 4USGS ! BLM SPAR Response with Legacy Wells Usl.xlsx ;013 Risk &W CSP Status File XlHazkl T Page 3 of 14 AOGCC Subsurface AOGCC Surface WAR Workgroup Notes Status r Status � deed HERR, PA SI with iampling. Dining mud rssessment- Surface ;leanup. Site photos show areas of stressed iegetalion. No issues Plugged to 2232'. Diesel Wood and metal soled in USGS re ort. to surface debris. Pylons Need HRR, PA, SI with sampling_ Drilling mud assessment Surface Plugged to 2026'. Diesel Wood and metal Cleanup. to surface debris. P Ions Add to She list. Need HRR, PA, SI with sampling. Drilling mud assessment. Surface Cleanup. Od reported bubbling to the surface within reserve pit in 1982. Oily residue and sheen observed adjacent to east side of reserve pil, down hole material at the Plugged to 1875. Diesel Wood and metal surface to surface debris. P ons Add to Site list. Need HRR, PA, S) with sampl'uig. Drilling mud assessment - Surface Cleanup. Reserve pit berm had breaches anowirrg water to exit. Oil - stained sediment was observed above the Plugged to 1478'. Diesel Wood and metal waterline of the I. to surface debris. Site photos may show hydrocarbon sheen on Plugged to 2600'. Drilling Wood and metal water in well cellar mud & diesel to surface debris. Pylons Add to Site list. Need HRR, PA, SI with sampling. Drilling mud assessment. Surface Cleanup. Berms have been breached an allow water to flow out of reserve piUllare pit. Rising bubbles of ail observed in Hare pit 1484. Photos Show Plugged to 1825'. Diesel Metal debris. ra.. v-1 v.nnnralinn to Surface ... 0 •I SPAR Response with Legacy Wells Lisl.xlsx Page 4 of 114 0 0 vi encs o BLM 2013 Risk Historic AOGCC Subsurface AOGCC Surface Well Name Operator 1 RP f Land Mgr Priority CSP Status File #fHazld Release? SPAR Workgroup Motes Status Status Need HRR, PA, Sl wrlh sampling. Drilling mud assessment Surface Cleanup. Breaches in berm allow water to flow into and out of reserve pit, sheen on Plugged to 2700' Diesel Wood and metal West Dease #1 USGS l BLM Low None None Yes surface water in well cellar to surface debns. Pylons Add to Site list. Need HRR,. PA, SI with sampling. Drilling mud assessment. Surface Cleanup. Water flows into the pits through breaches on the eastern berm and out of the pits through breaches on the northern and western berms. Downhole material Plugged to 228'9'. Drilling Wood and metal South Harrison Bay #1 USGS f BLAB Low None None es Present at surface mud & diesel to surface debris. Add to Site list. Need HRR, PA, SI with sampliing. Drilling mud assessment. Surface Cleanup. Stressed vegetation noted and apparent in site pholos. Plugged to 2443'. Drilling West Fish Creek #1 USGS 1 BLM Low None None Yes Drilling mud around well mud & diesel to surface Pylons Need HRR, PA, SI with sampling. Drilling mud assessment, Surface Cleanup. High TPH Plugged to 1977'_ Drilling wellhead sticking concentrations underneath mud under plugs. Diesel up. Wood debris. Fast Simpson #2 USGS 1 BLM I Low _ Active 300.38.10912691 Yes, see file the rig inundation to surface Pylons South Barrow 94 US NavyiNorth Slope Bono None None None Unknown Need Surface Status completed gas well - no data South Barrow #5 USAF - BLM Unknown None None None. Unknown Need Surface Status completed gas well no data South Barrow #& US Na /Norlh Sto Burg None None None Unknown Need HRR, PA, St no data no data South Barrow #9 US NavyfNarih Slop2 Boro None None None Unknown Need HRR, PA, Sl no data no data _ South Barrow #10 US Navyfflorlh Sto Bora None None None Unknown Need Surface Status com ted gas well no data South Barrow It12 US Na /North Slope Baro None None None Unknown Need HRR, PA. Sl no data no data BLM well skMh not consistent with AOGCC South Barrow #14 US NavyMorth Sloe Boro None None one Unknown Nsed HRR. PA, St data no data Need PA ind drill fluid well left filled with drilling South Barrow #16 US NavyiNotih Slope Bora None None None Unknown assessment & workplan mud and diesel no data Need PA incl drill !turd tubing in well. no perfs, Soulh Barrow 017 US Na /North Sloe 13ora None None None jUnknown assessment & work fan I unknown fluid, I no data Page 4 of 114 0 0 SPAR Response with Legacy Wells Lisl.xisx Page 5 of 14 •I E CYfuu .v v AOGCC Subsurface A Surlaco TEHILM T013 Risk CSP Stilus File #IHaaid Historic Rekeasa7 SFAR YUnrkgroup Nates 5latus at US $1<ntus Well Name flperatar f RP f Land Mgriority Unknown Need Surface Status corn feted as well no data 5aulh Barrow #18 US Na INorlh Slo a Bora None None None Unknown Need HRR, PA, St no data no data Walak a #1 USGS! Unknown None None None rsg 890`. Multiple cement plugs of unknown volume. Shallowest None None Unknown _ Need HRR, PA, SI SOD' no dada Gubik #1 US Na d Ur#cnown Low Add to Site list. Need HRR. PA. SI with sampling. csg Q SOD' Well blowout Drilling mud assessment. from zone al 1SOT during Surface Cleanup. Photos plugging operations show disturbed/ slashed Plugging never completed after blowout. no data Gub* #2 US Na ! Unknown Low None Nora es areas two downhole Dement plugs of unknown depth Mone None Unknown Need MR. PA. Sl and volume no data Grandstand #1 US Navy 1 Unknown None Add to Site list. Need HRR. PA, SI with sampling. Dnliing mud assessment. Surface Cleanup Sediment from the reserve pit was excavated and spread over the pad to drill a 2nd well at this location, Upon completion of the 2nd well. the sediment was pushed back into ft reserve pit.. Area does not appear to be revegetaling. perhaps from the presence property plugged but no of drilling mud at the data on abandonment None None Yes surface status no data W 7 Foran #1 " USGS I Unknown Low on Site list. Need HRR, PA, SI with sampling. Drilling mud assessment. Surface Cleanup. Slressed vegetation, photos show plugged, but not open csg; metal & Active 306.3$.108f2689 Yes. see file site underwater abandoned at surface corwsele debris under 5' of water, Cape Halken #1 " US Na (Unknown Low None Unknown !Need HRR, PA. SI es to 27' open C_s Min a Veloei #1 U5 Na f t3LM one None csg @ 31" 280' of drill pipe, drill collar, and Core Unknown Need HRR. PA, SL barrel left rn hole. neve etaled Ournalik Core #i US Na / BLM None -No obsery None !None Page 5 of 14 •I E SPAR Response with Legacy Wells Lisi.xlsx Page 6 of 14 • • WI F3nCe Q BLM 2013 Risk Historic AOGCC Subsurface ADGCC Surface Well Name Operator t RP I Land Mgr Priority CSP Status File #IHazid Release? SPAR Workgroup Notes Status Status Need HRR, PA, Workplan for St with Sampling. Drilling Mud Assessment. Surface Cleanup. Photos show debris, stressed No csg. 15' of drift pipe Oumalik Care #2 US Navy 1 ULM Low None None yes ve elation and rock hit left in hole. no data Need HRR, PA, Workplan for Si with Sampling open csg & other Drillip) Mud Assessment. piping sticking out Surface Cleanup_ Reports of ground; wood, of debris, drilling muds on melat, conciele Oumalik Core 011 US Navy t BLM Low None None Yes surface (__q to 9'. debris open csg sticking out of ground; wood & metal 0umalik Core #12 US Navy I BLM Low None None No Need HRR, PA, SI no data —__—debris _„ debris buried by landslide. Need HRR, PA, St, Well not no dala on Sentinel Hill #1 US Navy 1 BLM Low None None Unknown ap panent in site Rholos Csq to 3t1'. underwater status Need IQR, PA, SI. No evidence of sheen, open crag slightly stressed veg, or drilling above ground waste on surface. Veg 37' of csg, drilling fluids level; wood and S imp son Core Test #1 US Navy 1 BLM Low None None No appears healthy lett in hole metal debris Need HRR, PA, St. No evidence of sheen, stressed veg, or drilling waste on surface_ Veg 76'01 Csg, drilling fluids Simpson Core Test #2 US Navy I BLM Low None None No appears healthy left in hate no data Need HRR. PA, Sl. No evidence of sheen, stressed veg, or drilling waste an surface. Veg 61' of csg, drilling fluids Sim sun Core Test #3 US Navy I BLM Low None None No appears healthy left in hole no data Need HRR, PA, St. No evidence of sheen, stressed veg, ordrilling waste on surface. Veg --60' of crag, drilling fluids Sim eson Core Test #4 US Nayy t BLM Low Norse None No apecars healthy left in hole no data Need HRR, PA, St. No evidence of sheen, stressed veg, or drilling waste on surface. Veg csg cemented @25% open csg sticking Songsoncore Test #13 US Na 1 BLM Low None None No appears health dritin fluids IeR in hole_ out of round Need HRR, PA, SI. Vegetated, no evidence of crag cemented @2D'; open csg sticking Simpson Core Test #14 US Navy ! BLM Low None None No release. drillin fluids left in hole out of ground Page 6 of 14 • • SPAR Response with Legacy Wells Lisl.xlsx ism son Core Fest #26 t=vrdence or Medium AOGCC Subsur(aen ADGGC Surface 13LM 2013 Risk CSP Status File WHazid Historic Retease7 SPAR Wwkgroup Notes Status Status Well Name operator r RP 1 Land Mgr Priority Unko Need HRR, PA. SL US Na ! $LM open casing None Nave Vegetated. no eV4dence of cog set shallow; drilling slicking nut of Low No release- fluids left in hole round Simpson Core Teri #14a US Na !BLM Low None None & weilhead slick Need HRR. PA, SI crude nil left in hole open casing Need HIR, PA, Workplan Vegetated, no e+wdence of csg cemented 12181; slicking out of openrigd ng No release. drillingfluid left in hole round Simoson Care Tesl #15 US Na !BLM Low None None d wooden cellar, Need HRR, PP, SL Sate a9 r�110'. dolling fluids wood 8 metal ism son Core Fest #26 US Na ! BLM Medium None None res Sim san Core Test 027 US Na J 13LM IJone None None Unko Sim son Gore Test #28 US Na ! $LM Low None Nave Yes clmnnnn Core Tesl #29 US Navy! BLM Low Norte No No Simpson Core Test 030 US Na 1 !BLM Core Test #30a JUS,Navy 1 BLM Low `None f'tone n Gore Test #31 JUS Navy/ BLM None Page 7o(14 photos appear to show oil at surface, from a natural csg Q 350'. Completed in oil seep, seep, also drilling mud in oil well Open perfs. At 1welhead sticking sacks on the tundra one lime capable of up_ metal debris PI u ed b BLM in 2004. unassisled flow. and rustingbarrels 'Need HRR, PA, St. Site photos appear to show Oil csg cemented at surface, from a natural @i02;dnllutg fluids nn oily ground; csg seep- Plugged by BLM in including diesel and & weilhead slick vin 2004 crude nil left in hole out of ground Need HIR, PA, Workplan for Sl with Sampling- openrigd ng ❑rilling Mud Assessment . out grouunnd in Surface Cleanup. Site d wooden cellar, photos appear to show a p le of drilling mud about a9 r�110'. dolling fluids wood 8 metal 160 feel tram the welt tell in hole debris. Solid waste Need HRR, PA, Sl_ No evidence of sheen, stressed veg, or dri" waste on surface. Veg csg cemented at 1S2'; open csg. Wood a ears healthy dnknq fluids lett in hole and metal debris Need HRR, PA, SI. frilling mud at surface. but well is also in the middle of a large in oil seep; Open oil seep and surrounded by cog sticking up; pooled oil. Plugged by BLNI csg cemented A150'; wood & metal see Holes in 20514- drillin fluids left in hole detail on oily ground; tog Need HRR. PA, Sl. Well is wellhead slick in the middle of a large oil seep and surrounded by csg cemented at 100% out of ground. pooled oil. Plugged by 131. dulling mud left in hole. wellhead leaking see noses in 2004 gas blowout at 423' gas Need HRR, PA, St. Leaky valve replaced in 2001, little evidence of contamination following valve on city ground; rig replacement- Plugged by csg cemented at 100'; & wellhead stick see notes BLM in 20174 iddifing fluids, left in hole out o1 round SPAR Response with Legacy Wells List.xlsx Page 8 of 14 • • yr enco o BLM 2013 Risk Historic AOGCC Subsurface AOGCC Surface Well Name Operator f RP f Land Mgr Priority CSP Status File glHasid Release? SPAR Workgroup Notes Status Status Need HRR PA, Workplan csg Cemented at for Sl with Sampling. 1028', cement plugs a1 Drilling Mud Assessment. 6387' and 5520'. Fish in Surface Cleanup. Drilling hole, drilling fluids Iefs in No data. Open Simpson Test Welt #1 ak US Navy1 BLM Low None INone yes muds near wellhead hale casing Need HRR, PA, Workplan for Sl with Sampling. Dolling Mud Assessment. Surface Cleanup Also Wellhead sticking evidence of a natural seep- above ground, Tar sheens in the summer ST from 2552 to 3018. wood, melel, and months. BLM is concerned csg @2915. Slotted liner concrete debris. Fish Creek #1 US Navy I BLM Medium None None Yes about exposure to wildlife to TO. Completed oil well Rusting barrels Need HRR, PA, Workplan for SI with Sampling. rasing cemented at 48; Drilling Mud Assessment. gas 0mv and explosion Surface Cleanup. Small gas while drilling at 863'; hole leak in wellhead flange, will Filled with fresh water to Wolf Creek 91 US Navy f BLM Low None Nano No flow if the valve iso en 330' No data. csg cemented a[ 53';hole left tilted with fresh water, Wolf Creek 02 US Navy 1 BLM Low Noire None No Need HRR. PA. Sl. fish in hole csg cemented at 107'; No data bridge plugs from 1447 to 1735 and from 554 to Wolf Creek #3 US Nayy I BLM Low None None No Meed HRR, PA, SI. 661, No data Add to Site list. Need HRR, PA, SI with sampling. csg slicking out of Drilling mud assessment ground with wood Surface Cleanup. Sheen on plug on top; solid surface water in well cellar, csg cemented at 30'; drill waste; wood hundreds of drums indicate pipe, drilling mud and debris; about 200 Skull Cliff Core test #1 US NaMy I BLM High None None Yes polential for cornlamrna[ion diesel left in hole nisling barrels Need HRR, PA, SI. Two open csg, wood drums are floating on a building; pylons; pond near the well. csg cemented at 1000', wood & metal Kaolak 01 US Navy I BLM t ow None jNone lNo Potential for hurried landfill. fdriltingluidsieftin hole debris Page 8 of 14 • • SPAR Response with Legacy Wells Lisl.xlsx 181-11119013 Risk Well Name Operator f RP ! land Mgr Priorlty CSP Status File 1NHazid #1 1 U Navy 19LM #1 JUS Navy/ umatik Ill US Na I BLM Low None None as[ Oumalik #i US Na !BLM Low None None #1 N East Topagoruk #1 USN l BLM Knifeblade #1 US Navy! BLM Page 9 of 14 Subsurface `AOGCC Surface SPAR Workgroup Notes Status Add to Site list. Need HRR, PA, SI with sampling. open flange Q Drilling mud assessment. Surface Cleanup. Drilling Gas well. Open ports. ground level. Mud pile overgrown with Drilling fluids and Metal & wood v , etallon and lichen tubulars lett in hole debris Need HRR, PA, SI. No evidence of sheen, stressed veg, or drilling csg cemented at 502'; open casing slicking out of waste on surface. Veg plug at 3470 to 3511'; ground. Wood appears heall drilling nuids left in hole debris. Open casing below Add to Site list. Need HRR, ground level. PA, SI with sampling- Revegetated. Drilling mud assessment. Numerous metal Surface Cleanup. Debris csg partially cemented at I support structures and drilling muds. Stressed 2762'. Plug at 2543% sticking up. vegetation Dridin mud left in hole Concrete debris, plate welded to pipe: l' of pipe rsg cemented at 1100'. sticking up - Need HRR. PA. SI. Drig fluids left in hole Wooden debris. Add to Site list. Need HRR, PA, SI with sampling. Driving mud assessment. open csg broken Surface Cleanup. Downhole material present csg cemented at 6073'. off and sticking up: at surface, area mostly original hole drilled to wood, metal, revegetated. Diesel still 7154'& junk len; concrete and other occupies the ground sidetrack hole left wilh debris. rusting dreulatioir lines. drillina fluids barrel Add to Site list. Need HRR, PA, SI with sampling. Dolling mud assessment. Surface Cleanup. Pile of tsg 10 1100'; pkig al open casing drilling muds is next to the 1049% drilling mud below sticking up. Wood, teller. No offical reserve pit plug: unknown fluids in metal, and glass noted o en hole debris. open casing Need HRR, PA, SI. BLM sticking up. Wood, stales that there was no metal, and glass debris at this site in 2012. csg cemented at 420% debris - •I 0 SPAR Response with Legacy Welts Lisl.xlsx Paye 10 of 14 0 0 w once a BLM 2013 Risk Historic AOGCC Subsurface AOGCC Surface Well Name Operator I RP f Land Mgr Priority CSP Status File #IHazid Release? SPAR Workgroup Notes Status v F Status open casing sticking up. Wood, metal, & concrete debris rusting Need NRR, PA, SI. Reports barrels. One indicate solid waste csg cemented to 45';fish marked flammable Knileblade #2 US Navy I BLM Low None None No drums in hole hazard. open casing slicking up; metal & Krideblade #2a US Navy 1 BLM Low None None No Need HRR, PA, SI. csq cemented at 38% concrete debris Need HRR, PA, SI including learning assessment. Site partially No wellhead. submerged intermittently csg cemented at 80; Metal. Solid waste North Simpson Test Wel 4 US N2n I BLM Low None None No during the summer dri0ing fluids left in hole ? No dala crude wellhead. Need HRR, PA, St. Surface csg cemented at 685'; Wood and metal Umiat 01 US Navy J BLM I FUDS Medium Cleanup co 335.38.00113090 Yes, see file Cleanup drillinq fluids left in bole debris No wellhead. Gravel pad partially csg cemented a1486; revegelaled wood Need HRR, PA, SI. Surface cement plug from 440 to debris and pipe Umiat #i t US Na I BLM I FURS Low pending dos 335.38.00113083 Yes, see file Clea 490'; sticking u csg cemented at 7206'; vVefNwad- Gravel various plugs from 8250' pad revegetaled 7 South Sirnpson 01 US Navy I BLM Low None None Yes Need HRR, PA, SI. to surface No data Add to Site list. Need HRR, PA, SI with sampling. Drilling mud assessment. Surface Cleanup. Large quantifies of ferrous oxide, zinc oxide, zinc carbonate, and barium sulfate were added to drilling muds. Stains apparent in photos. BLM field camp an site. Walls between the reserve and Pare pits have eroded. Wellhead and Water flows into surface gravel pad. ? No Wook #1 USGS I BLM Low lNone Name Yes water during break22L no data data Paye 10 of 14 0 0 SPAR Response with Legacy Wells Lrsl.xlsx BLM 2x13 Risk Well Name 10porator I RP I Land Mgr Priority CSP Status I File #IHazid Arca- Barrow Cure #1 US Na l til.M Avak 01 US Navy I BLM Barrow Bi R' #1 US Na I BLM Barrow Cafe Rig Test 91 US Na I BLM #2 I US Navy I BLM #1JUS N,a I BLM H' h NOr1e None Test Well #1 US Test Well #2 US Barrow Test Wetl #31115 Na IN©r1h Slo c Bora IAedium None None Unknown Page 11 of 14 Subsurface -FAOGCC Surface SPAR IWorkgfoup Notes Status _ ___ araiu5 Need HRR, PA, SI. Surface Cleanup, Photo CIMG0218 csg cemented at 53` shows area of disturbed tubing hung to 708': hole open casing vegetation that should be heft filled with drilling mud slicking up; wood & investi algid durin Sf and diesel metal debris open casing Need HRR. PA, St. Surface csg cemeoled at BIF. sticking up; wood & Cleanu-. lu set at 1348' metal debris Not abandoned, site not cleared, Need HRR, PA, SI. Surface open casing 7? No Cleanup no data data Not abandoned, site not cleared, Need HRR. PA, SI. 'Surface open casing 77 No Cteanu no data data Need HRR, PA, St with sampling. trilling mud assessment. Surface Cleanup. Drilling Muds on Not abandoned, site -slowly revegelatmg site not igred, More information on drilling open casing 7? No mud specifics rs being researched no data data Need 1lRR, PA, SI wdh sampling. Drilling mud wellhead leaking assessment. Surface cemented Csg to gas!? Wood & Cleanup- Cellar does not 1270;slotted liner to metal debris. Area retain water 1956': tbg to 1939 affected 50'x50' Need HRR, PA. SI. Drilling Csg cemented at mud assessment. Surface 441'.hole Iell willed with open pipe; metal & Cleanup- On mads stem water concrete debris Need HRR, PA, Sl. Drilling Csg cemented al 2260'; mud assessment- Surface periorated liner to TD. wood, metal & Cleariu . fln road s stem lin Completed well. Conerete debris Need HRR, PA, SI with sampling and workplan. Drilling mud assessment. Surface Cleanup. Drilling +csg cemented at 10461: open c5g slinking mud at surface. Sheen on hole left filled with drilling up; wood & metal surface wafer in well cell larQuids and wafer. de" 0 SPAR Response with Legacy Wells Lisl.xlsx Well Flame Operator I RP I Land Mgr BLM 201$ Risk Priority CSP Status File #ltiazid yr once oF— Historic Release? SPAR Workgroup Notes AOGCC Subsurface Salus g AOGCC Surface Status no data. Likely revegetaled. Removed from our list of wells of concern in < 50', no csg, no API#, October, 2012 Oumalik Foundation Test A US Navy I BLM None-uncased hc None None lUnknown Need HRR, PA. not in AOGCC database Monlht Meeting no data. Likely revegetated. Removed from our fist of wells of concern in < 50', no csg, no API#, October, 2012 Cumalik Foundalion Test b US Navy I BLM None-uncased hC None jNane Unknown Need HRR. PA, not in AOGCC database Monthly Meeting no data. Likely revegetated. Removed From our irsl of wells of Concern In < 50', no csg. no API#, October, 2012 Oumalik Foundation Test A US Navy I BLM None-uncased hc None lNone Unknown Need HRR. PA, not m AOGCC database Monthly Meeting no data. Likely revegetated. Removed from our list of wells of concern in < 50', no c5g. no APF#. Odubut. 2012 Oumalik Foundation Test A US Navy I BLM None-uncased ht Nune lNone Unknown Need HRR, PA, nal in AOGCC database Monthiv Meetin no data. Likely revegetaled. Removed from our Ilst of wells of con cam in < 501, no csg, no APi#. October, 2012 Oumatik Foundation Test 0 US NavyI BLM None-uncased hc None None Unknown Need HRR. PA, not in AOGCC database Moral Meeting no data. Likely revegetaled. Removed from our list of wells of concern in < 50', no csg. no API#, October, 2012 Ournalik Foundation Test 4US Navy I BLM None4xwased h_j None None Unknown I Need HRR. PA, not in AOGCC database Month Meetin Page 12 of 14 0 Page 13 of 14 SPAR Response with Legacy Wells LrsLxisx Well Name BLM 2013 Risk Operator f RP I Land Mgr Priority Historic CSP Status Fife #IHazld Rslease7 AOGCC subsurface Status �__ - -_-�� . A013CC Surface Status no dala. Likely SPAR 1Norkgroup Nates revegelaled. Removed from our list of wells of concern in < 50'. no csg, no AP IN, October, 2012 Oumalik Foundation Test US Na!q BLM None -encased h None None Unknown Need HRR. PA. not w AOGCC database MonthlyMeeiin no data. Likely revegelated. Removed from our list of wells of concern in < 501. no csg, no API#, October, 2012 Oumalik Foundalion rest U5 Na I BLM None -encased h None None Unknown Need HRR. PA, not in AOGCC database Monihl lAeeli no data. Likely revegetaled. Removed from aur fist of wells of concern in 0urn alik Foundation Test US Na 18 LM None -encased fi None None ilnknown Need HRR. PA, < 50', no csg. no API#, not in AOGCC database October, 2012 Month! Meetin no data. Likely revegetated. Removed from our list of wells of concern In < 50', no csg, no API#, October, 2012 Oumalik Foundat'Gon Test US Na I BLM None encased h Nome None Unknown Need HRR, PA, not m AOGCC database Month! Meeting property abandoned per then -applicable South Banow #7 US NEILM 2LI None None Unknown Need HRR. PA, ro erl lu ed re s no data to support proper Um -Qt 02 US N Noire Pendin Clo 335.30.001/3078 Yes, see file Plu d to surface abandonment no data to support proper Uncal #5 Ummt #9 Urrval A66 Umial #T Atiaaru Point#1 U5 US US Na I BL M US Na I BLM USGS/BLM None Pendin Hi h -PCB cleanu Active None Pendia None tPendi Mane Clo 3L5 313.00113079 335.38.00113093 Cao 335.3$.00113080 Clo 335 38 001I3091 None Yes, see file Yes, see file Yes, see file Yes. see lite No Plu ed E4 surface property plugged and abandoned pfupedy plugged and abandoned property plugged and abandoned Need HRR. PA,Plugged by properly plugged and BLM in 2009. abandoned abandonment suriaoe site remediated surface site remediated suriacx V le remediated surface site remediated Page 13 of 14 SPAR Response with Legacy Wells LrsLxlsx Page 14 of 14 0 vrcTon`ce o BLM 2813 Risk Historic AOGCC Subsurface AOGCC Surface Well Name Operator i RP 1 Land Mgr Priority CSP Status File #fFlaxid Releases SPAR Workgroup Notes Status Status Add to Site list. Need HRR, PA. SI with workplan and sampling. Chilling mud assessment. Surface Cleanup. Two large breaches on the south side of the berm allow water out of the reserve pit. Plugged properly plugged and surface site Drew Point #1 USGS 1 BLM None None None Yes by BLM in 2410. abandoned remedialed On Site list Need HRR, PA, 51 with workplan and sampling. [frilling mud assessment. Surface Cleanup. In 1976 the reserve pit berm failed and dolling muds/cutlings were released onlo the Poe of Teshekpuk Lake. Plugged by BLM in 2008. Solid waste from camp aril drilling operations buried on northern portion of pad. Erosion has exposed solid properly plugged and surface site East Teshek uk #1 US Navy 1 BLM None Active - waits 3Q0.38.11012652 Yes, see file waste. abandoned remediated Threatened by erosion. properly plugged and surface site J. W. Dalton $P USGS f BLM None None None No Plu ed b BLM in 20fl5. abandoned rernediated properly plugged and surface site South Barrow #8 USAF 1 BLM None None None Unknown Need HRR, PA, abandoned remediated properly plugged and surface sile South Bartow 911 US Na INorih Slope Bono None None None Unknown Need HRR, PA, abandoned remedialed properly plugged and surface site South Barrow 013 US Na lNerlh Slope Boro None None None Unknown Need HHR, PA, abandoned remedialed properly plugged and surface site South Barrow #15 US Na !North Sloe Boro None None None Unknown Need HRR, PA, abandoned remediated properly plugged and surface site South Barrow #19 US Na 1Nrarlh Sloe Baro None Nana None Unknown Need HRR. PA, abandoned remediated Properly plugged and surface site South Barrow 1x20 US Na Worth Slope Bora None None None Unknown Need HRR, PA, abandoned remedialed Need HRR, PA, dolling mud assessment, containment assessment, possible releases. Breaches allow wafer to flow into and aul of property plugged and surface site Watakpa #2 USGSI BLM None None lNone lyes I reserve and flare pits. labandoned irernediated Page 14 of 14 0 C) C.) T L LK -E STAZEE Of A LASKA Division of Spill Prevention and Response GOVERNOR SEAN PARNELL . Contaminated Sites Program 610 University Ave. Fairbanks, Alaska 99709-3643 Main: 907.451.2181 Fax: 907.451.2155 July 11, 2013 Wayne Sve)noha Supervisory Minerals & Energy Speciahst 222 W 7th Avenue, #13 Anchorage, Alaska 99513 Re: BLM Legacy Wells Dispute Dear Mr. Sveinoha: SCWED A P R 2 8 2 014 The Alaska Department of Environmental Conservation (ADEC) — Contaminated Sites has reviewed the National Petroleum Reserve in Alaska: 2013 Legacy Wells Sun-nnary Report dated February 2013, containing updated information on the status of the 136 Legacy Wells located in the National Petroleum Reserve — Alaska (NPR -A), and the draft National Petroleum Reserve in Alaska: 2013 Legacy Wells Strategic Plan dated May 2013. ADEC has also reviewed the response by the Alaska Oil and Gas Conservation Connnission (AOGC). We concur with the response by AOGC and have no further commentregarding the priorities. We do have comments about the investigation and cleanup plans presented 'in the report. With t1iis letter we are outlining regulatory requirements related to the environmental work that is proposed and requited as part of these cleanups. ADEC is concerned that the 2013 Legacy Wells Strategic Plan prepared by the BLM does not *include either assessment or the contingency for assessment of known, hkely, or unknown but possible contaminant releases. In addition, BLM plans for surface cleanup of these wells should be made clear in the plan. At least one of these legacy wells has extensive PCB contamination and has resulted in a multi-year cleanup totaling tens of millions of dollars. At others, solid waste disposal practices have resulted in releases to the environment with estimated cleanup costs in the hundreds of millions. Known releases documented in the records we reviewed include crude oil, gasses, refined oil and fuel, drilling fluids that include various organics, metals, and other chemicals, and unknown contaminants from drunis and other containers observed to be damaged and abandoned at the various well sites. There are 13 legacy well sites with known releases currently on the DEC contaminated sites list. Many of these are *in the process of being addressed, cleaned up, and closed. From our limited records review there are 15 additional legacy weU sites with confirmed releases. These should be priotitized for initial recordsteviews and then added to the BLM contaminated sites hst under our cooperative agreement. Suspected releases include fuel releases from operations, storage, and fuel spills at the sites, impacts to various surface water bodies from spilled fluids during drilling and breaches of containment at reserve and flare pits, continued surface runoff from drilling fluids uncontained at several sites, and down -hole substances that were ejected from the holes over time or during blowouts or drilling operations. . Wayne Sve'roha July 11, 2013 The BLM plan to address these known, suspected, and unknown releases at legacy well sites is notably absent from drie documents presented to C -late. The three priman, re�4ulatorn- agencies that need to be Involvedi the plan are ADEC — Contanuinated Sites, Alaska Oil & Gas Conservation Commission, and ADEC — EH/Sohd Waste. Other agencies will need to be consulted as well. Below we provide recommendations for a coordinated plan us' ing the Uniform Federal Policy for Quality Assurance Project Plans (UFP-QAPP) that will involve all of the regulatory agencies in one coordinated manner. This will allow BLM to address these sites 'in a consistent and coordinated project which fulfills all of the regulatory requirements so that the sites do not need to be re -visited 'in the future when they are closed after this project. Attached are our comments on each specific well. The acronyms used on the listmiclude terms that are typically used 'in a CERCLA type 'investigation however they are also suitable for investigations conducted under the State of Alaska cleanup rules. These include the following; Historical Records Review (HRR) This is recommended for almost all of the well sites. Much of the 'information required for these reviews is already contained 'in various reports and appendices or 'in BLM files. The Historical Records Review should document the type of releases that rruight have occurred from drilling operations as well as historical use of the site, and should capture all available information on the drilling fluids used and any product produced or released. Preliminary Assessment (PA) This is recommended for almost all of the well sites. A Preliminary Assessment is a limited scope investigation that provides an assessment of 'information about a site and its surrounding area to distinguish between sites that pose little or no threat to human health or the environment and sites that require further investigation. The PA is a CERCLA defined document and typically does not require sampling. Site Inspection (SI) If the PAtecommends further investigation, then an SI is necessary. The Sl is a CERCLA defined document, and it is analogous to an initial report of contamination under state cleanup rules. On some legacy well dtillings sites it is evident now that an Sl is required just from a review of the reports. An SI investigation typically includes the collection of samples to determine what contaminants are present at the site and whether they are being released into the environment. An approved site specific workplan is required under both CERCLA and 18 AAC 75 prior to SI sampling. The SI typically is not intended to develop a fall site characterization, but is limited to determining the presence or absence of a release. If contamination is found after completion of the HRR, PA, and SI then a RI/FS under CERCLA, or a Site Characterization Report and cleanup plan under 18 AAC 75 is required. DEC recommends that BLM incorporate into the strategic plan the processes outlined in this letter. A team of agencies composed of AOGC, DEC -CS, EPA as required, and DEC -EH should address regulatory and technical requirements for these well closures. By cooperating and working together with the regulatory agencies BLM will save time and expense, and regulatory uncertainties will be avoided. The strategic plan should reference a project to prepare a generic workplan. DEC suggests that BLM utilize the generic UFP-QAPP workplan format for the required environmental work. If properly prepared, the workplan could encompass most of the investigations and cleanups required at these sites over multiple years. At other multi -site projects we have found this to be an effective way to reduce uncertainties and risk in these types of investigations. A very small site specific FSP could then be developed as BLM approaches each drilling site. Regulatory decisions made during workplan development would provide more certainty in the planning process for cleanups. 1-A4ZP A P�Al A enr�pq\r)01\BT.M\Proiects\leeacv WeUs\7 11 13 Letter to BLM on Legicy WeUs.docx . Wayne Svejnoha Tulv 11. 2013 Please review the attached list of specific sites. -if you have any questions, please do not hesitate to call me at 907-451-2181 or by email at fred.vreeman@alaska-gov. I look forward to working with you as the Federal Government fulfills its requirement to clean up these well drilling sites 'in Alaska. Sincerely, Fred Vreeman Environmental Program Manager Enclosure: SPAR Response with Legacy Wells cc: Bud Cribley, State Director, Bureau of Land Management Steven Cohn, Deputy State Director for Resources, Bureau of Land Management Johe Pollet, Branch Chief, Bureau of Land Management Robert Brumbaugh, Geologist, Bureau of Land Management Michael McCrum, Environmental Engineer, Bureau of Land Management Cathy Foerster, Commissioner, Alaska Oil and Gas Conservation Commission Larry Hartig, Commissioner, Alaska Department of Environmental Conservation Kristen Ryan, Director, ADEC Division of Spill Prevention and Response Steve Bainbridge, Program Manager, ADEC Contaminated Sites Program Jennifer Roberts, Program Manager, ADEC Contaminated Sites Program SPAR Response with Legacy Wells List.xlsx Page I of 14 I—V-05-5-65-51— BILM 2013 Risk Historic AOGCC Subsurface AOGCC Surface Well Name Operator / RP I Land Mgr Priority CSP Status File #/Hazid Release? SPAR Workgroup Notes Status Status Simpson Core Test #5 US Navy I BLM Low None None Unknown Need HRR, PA, Sl no data no data Simpson Core Test #6 US Navy / BLM Low None None Unknown Need HRR, PA, Sl no data no data Need PA incl drill fluid Simpson Core Test #7 US Navy / BLM Low None None Unknown assessment & workplan drilling fluids left in hole no data Need PA incl drill fluid Simpson Core Test #8 US Navy / BLM Low None None Unknown assessment & workplan drilling fluids left n hole no data Need PA ind drill fluid Simpson Core Test #9 US Navy / BLM Low None None Unknown assessment & workplan drillinq fluids left in hole no data Need PA ind drill fluid Simpson Core Test #10 US Navy / BLM Low None None Unknown assessment & workplan drilling fluids left in hole no data well sketch provided by Need PA ind drill fluid BLM not consistent with Simpson Core Test #11 US Navy / BLM Low None None Unknown assessment & workplan AOGCC or BLM data no data Need PA incl drill fluid Simpson Core Test #12 US Navy / BILM Low None None Unknown assessment & workplan drillinq fluids left in hole no data Need PA and Sl ind drill fluid assessment, workplan ind sampling stressed debris, partially Simpson Core Test #16 US Navy / BLM None- Uncased, i None None Unknown areas gas blowout and fire revegetated site Need PA incl drill fluid Simpson Core Test #17 US Navy / BLM None- Uncased, r None None Unknown assessment & workplan drilling fluids left in hole no data Need PA incl drill fluid Simpson Core Test #18 US Navy / BILM None- Uncased, r None None Unknown assessment & workplan in hole no data Need PA ind drill fluid Simpson Core Test #19 US Navy / BLM None- Uncased, i None None Unknown assessment & workplan drilling fluids left in hole no data Need PA ind drill fluid Simpson Core Test #20 US Navy / BLM None- Uncased, i None None Unknown assessment & workplan drilling fluids left in hole no data Simpson Core Test #21 US Navy/ BLM None- Uncased, i None None Unknown Need HRR, PA, Sl no data no data Need PA ind drill fluid Simpson Core Test #22 US Navy / BLM None- Uncased, r None None Unknown assessment & workplan drilling fluids left in hole no data Need PA incl drill fluid Simpson Core Test #23 US Navy / BLM None- Uncased, i None None Unknown assessment & workplan drillin fluids left in hole no data Need PA ind drill fluid Simpson Core Test #24 US Navy / BLM None- Uncased, r None None Unknown assessment & workplan drillinq fluids left in hole no data Need PA ind driil fluid drilling fluids and ball Simpson Core Test #25 US Navy / BILM None- Uncased, r None None Unknown assessment & workplan peen hammer left in hole no data overshot, drill collar, rock revegetated BLM lkpikpuk Core #1 US Navy / BLM Low None None Unknown Need HRR, PA bit, and N -rods left in hole can't find it Review Report as PA. No evidence of sheen, stressed veg, or drilling waste on surface. Veg Notabandoned, Square Lake #1 [US Navy I BLM I Low INone INone INo apDears healthy I Plugged to surface site not cleared Page I of 14 SPAR Response with Legacy Wells List.xlsx Page 2 of 14 BILM 2013 Risk Historic AOGCC Subsurface AOGCC Surface Well Name Operator I RP I Land Mgr Priority CSP Status File #/Hazid Release? SPAR Workgroup Notes Status Status plugging operations inadequate and Wellhead left as Umiat #3 US Navy / BILM / FUDS None pending clos 335.38.001/3092 Yes, see file Plugged by BLM in 2004 incomplete historic site? plugging operations inadequate and Wellhead left as Umiat #4 US Navy / BLM I FUDS None pending clos 335.38.001/3079 Yes, see file Plugged by BLM in 2004 incomplete historic site? plugging operations inadequate and Wellhead left as Umiat #8 US Navy / BLM / FUDS None pending clos 335.38.001/3081 Yes, see file Plugged by BLM in 2004 incomplete historic site? plugging operations inadequate and Wellhead left as Umiat #10 US Navy / BILM / FUDS None pending clos 335.38.001/3082 Yes, see file Plugged by BLM in 2004 incomplete historic site? Need HRR, PA, Sl with sampling. Drilling mud assessment. Surface Plugged to 7868'. Drilling Cleanup. Photos - evidence mud and diesel to Awuna #1 USGS/BLM Medium None None Yes of erosion into lake surface. > 100 Pylons Need HRR, PA, Sl with sampling. Drilling mud Wood, metal, assessment- Surface Plugged to 2039'. Diesel plastic debris. East Simpson #1 USGS/BLM Low None None Yes Cleanup. to surface. >I 00 Pylons Need HRR, PA, Sl with Wood and metal Drilling mud assessment. debris. Pylons. Photos show areas of no Plugged to 2047'. Diesel Tankage for lkpikpuk #1 USGS/BLM Low None None Yes vegetation. to surface. flammable fluids Need HRR, PA, Sl with sampling. Drilling mud assessment. Surface Plugged to 1400'. Drilling Wood and metal Koluktak #1 USGSIBLM Low None None Yes Cleanup- mud & diesel to surface debris. Pylons Need HRR, PA, Sl with sampling. Drilling mud assessment. Surface Plugged to 1894'. Diesel Wood and metal Kugrua #1 USGS/BLM Low None None Unknown Cleanup. to surface debris. Pylons Need HRR, PA, Sl with sampling. Drilling mud assessment. Surface Plugged to 4464'. Drilling Wood & metal Kuyanak #1 USGS/BLM Low None None Yes Cleanup. mud & diesel to surface debris. Pylons Need HRR, PA, Sl with sampling. Drilling mud assessment. Surface Cleanup. Photos show Plugged to 1840'. Diesel Plastic and metal Lisburne #1 USGS/BLM Low None None Yes stained soil to surface debris. Need HRR, PA, Sl with sampling. Drilling mud assessment. Surface Plugged to 8192'. Drilling Wood and metal North lnigok #1 IUSGS/BLM 11 -ow lNone lNone IYes Cleanup. mud & diesel to surface debris. Page 2 of 14 SPAR Response with Legacy Wells List.xlsx Page 3 of 14 vi en BLIVII 2013 Risk Historic AOGCC Subsurface AOGCC Surface Well Name Operator i RP I Land Mgr Priority CSP Status File #/Hazid Release? SPAR Workgroup Notes Status Status sampling. Drilling mud assessment. Surface Cleanup. Site photos show areas of stressed vegetation. No issues Plugged to 2232'. Diesel Wood and metal North Kalikpik #1 USGS/BLIVI Low None None Yes noted in USGS report- to surface debris2XIons Need HRR, PA, Sl with sampling. Drilling mud assessment. Surface Plugged to 2026'. Diesel Wood and metal Peard #1 USGS/BLM Low None None Yes Cleanup. to surface debris. Pylons Add to Site list. Need HRR, PA, Sl with sampling. Drilling mud assessment. Surface Cleanup. Oil reported bubbling to the surface within reserve pit in 1982. Oily residue and sheen observed adjacent to east side of reserve pit, down hole material at the Plugged to 1875'. Diesel Wood and metal South Meade #1 USGS/BLM Low None None Yes surface to surface debris. Pylons Add to Site list. Need HRR, PA, Sl with sampling. Drilling mud assessment. Surface Cleanup. Reserve pit berm had breaches allowing water to exit. Oil - stained sediment was observed above the Plugged to 1478'. Diesel Wood and metal Seabee #1 USGS/BLM Low None None Yes waterline of the pit. to surface debris. Site photos may show hydrocarbon sheen on Plugged to 2600'. Drilling Wood and metal Tulageak #1 LISGS/BLM Medium None None Yes water in well cellar mud & diesel to surface debris. Pylons Add to Site list. Need HRR, PA, Sl with sampling. Drilling mud assessment. Surface Cleanup. Berms have been breached an allow water to flow out of reserve pit/flare pit. Rising bubbles of oil observed in flare pit 1984. Photos show Plugged to 1825'. Diesel Metal debris. Tunalik #1 JUSGS/BLM I Low lNone lNone lYes 1 stressed vegetation Ito surface 1 Pylons Page 3 of 14 SPAR Response with Legacy Wells List.xlsx Page 4 of 14 E -vi -de —nce -oT BLM 2013 Risk Historic AOGCC Subsurface AOGCC Surface Well Name Operator / RP Land Mgr Priority CSP Status File #/Hazid Release? SPAR Workgroup Notes Status Status Need HRR, PA, Sl with sampling. Drilling mud assessment Surface Cleanup. Breaches in berm allow water to flow into and out of reserve pit, sheen on Plugged to 2700'. Diesel Wood and metal West Dease #1 USGS/BLM Low None None Yes surface water in well cellar to surface— debris. Pylons Add to Site list. Need HRR, PA, Sl with sampling. Drilling mud assessment. Surface Cleanup. Water flows into the pits through breaches on the eastern berm and out of the pits through breaches on the northern and western berms. Downhole material Plugged to 2289'. Drilling Wood and metal South Harrison Bay #1 USGS/BLM Low None None yes present at surface mud & diesel to surface debris. Add to Site list. Need HRR, PA, Sl with sampling. Drilling mud assessment. Surface Cleanup. Stressed vegetation noted and apparent in site photos. Plugged to 2443'. Drilling West Fish Creek #1 USGS/BLM Low None None Yes Drilling mud around well mud & diesel to surface Pylons Need HRR, PA, Sl with sampling. Drilling mud assessment. Surface Cleanup. High TPH Plugged to 1977'. Drilling wellhead sticking concentrations underneath mud under plugs. Diesel up. Wood debris. East Simpson #2 USGS/BLM Low Active 300.38.109/2651 Yes, see file the riq foundation to surface Pylons South Barrow #4 US Navy/North Slope Boro None None None Unknown Need Surface Status completed gas well no data South Barrow #5 USAF - BLM Unknown None None None Unknown Need Surface Status completed gas well no data South Barrow #6 US Navy/North Slope Boro None None None Unknown Need HRR, PA, Sl no data no data South Barrow #9 US Navy/North Slope Boro None None None Unknown Need HRR, PA, ST- no data no data South Barrow #10 US Navy/North Slope Boro None None None Unknown Need Surface Status completed gas well no data South Barrow #12 US Navy/North Slope Boro None None None Unknown Need HRR, PA, Sl no data no data BLM well sketch not consistent with ACGCC South Barrow #14 US Navy/North Slope Boro None None None Unknown Need HRR, PA, Sl data no data Need PA ind drill fluid well left filled with drilling South Barrow #16 US Navy/North Slope Boro None None None Unknown assessment & workplan mud and diesel no data Need PA incl drill fluid tubing in well, no perfs, South Barrow #17 JUS Navy/North Slope BorojNone None None Unknown assessment & workplan unknown fluids no data Page 4 of 14 SPAR Response with Legacy Wells List.xlsx Page 5 of 14 __ _Evi-d_ence-of_- BI-M 2013 Risk Historic AOGCC Subsurface AOGCC Surface Well Name Operator / RP I Land Mgr Priority CSP Status File #IHazid Release? SPAR I'Vorkgroup Notes Status Status South Barrow #18 US Navy/North Slope Boro None None None Unknown Need Surface Status completed gas well no data Walakpa #1 USGS / Unknown None None None Unknown Need HRR, PA, Sl no data no data csg @ 890'. Multiple cement plugs of unknown volume. Shallowest Gubik #1 US Navy / Unknown Low None None Unknown Need HRR, PA, Sl @800. no data Add to Site list. Need HRR, PA, Sl with sampling. csg @ 800'. Well blowout Drilling mud assessment. from zone at 1800' during Surface Cleanup- Photos plugging operations.. show disturbed/ stained Plugging never Gubik #2 US Navy / Unknown Low None None yes -areas completed after blowout. no data two downhole cement plugs of unknown depth Grandstand #1 US Navy / Unknown None None None Unknown Need HRR, PA, Sl and volume- no data Add to Site list. Need HRR, PA. Sl with sampling. Drilling mud assessment. Surface Cleanup. Sediment from the reserve pit was excavated and spread over the pad to drill a 2nd well at this location. Upon completion of the 2nd well, the sediment was pushed back into the reserve pit,. Area does not appear to be revegetating, perhaps from the presence properly plugged but no of drilling mud at the data on abandonment W T Foran #1 USGS Unknown Low None None Yes surface status no data On Site list. Need HRR, PA, Sl with sampling. Drilling mud assessment. Surface Cleanup. Stressed vegetation, photos show plugged, but not open csg; metal & Cape Halkett #1 — US Navy / Unknown Low Active 300.38.108/2689 Yes, see file site underwater abandoned at surface concrete debris under 5' of water, Minga Velocity #1 S Navy / BLM one one one n ee HHH, PA, Sl 9sg to 27' open csg csg @ 31'. 280'of drill IUS larrel pipe, drill collar, and core Ournalik Core #1 Navy / BILM None -No observa None None Unknown Need HRR, PA, SI. left in hole. _ revegetate Page 5 of 14 SPAR Response with Legacy Wells List.xlsx Page 6 of 14 Ev—id-efice ofr--- BLM 2013 Risk Historic �SPAR AOGCC Subsurface AOGCC Surface Well Name Operator / RP I Land Mqr Priority CSP Status File #/Hazid Release? Workgroup Notes Status Status i7e-e74W, PA, Oork-p—lan- for Sl with Sampling. Drilling Mud Assessment. Surface Cleanup. Photos show debris, stressed No csg. 15'of drill pipe Ournalik Core #2 US Navy BLM Low None None Yes vegetation and rock bit left in hole. no data Need HRR, PA, Workplan for Sl with Sampling. open csg & other Drilling Mud Assessment. piping sticking out Surface Cleanup. Reports of ground; wood, of debris, drilling muds on metal, concrete Ournalik Core #11 US Navy / BLM Low None None Yes surface csg to 9'. debris open csg sticking out of ground; wood & metal Oumalik Core #12 US Navy / BLM Low None None No Need HRR, PA, Sl no data debris buried by landslide, Need HRR, PA, St. Well not no data on Sentinel Hill #1 US Navy I BLM Low None None Unknown apparent in site photos csg to 30', underwater status Need HRR, PA, S1. No evidence of sheen, open csg slightly stressed veg, or drilling above ground waste on surface. Veg 37'of csg, drilling fluids level; wood and Simpson Core Test #1 US Navy / BILM Low None None No appears healthy left in hole metal debris Need HRR, PA, St. No evidence of sheen, stressed veg, or drilling waste on surface. Veg 76'of csg, drilling fluids Simpson Core Test #2 US Navy I BLM Low None lNone No appears healthy left in hole no data Need HRR, PA, SI. No evidence of sheen, stressed veg, or drilling waste on surface- Veg 61'of csg, drilling fluids Simpson Core Test #3 US Navy / BLM Low None None No appears healthy left in hole no data Need HRR, PA, SI. No evidence of sheen, stressed veg, or drilling waste on surface. Veg -60'of csg, drilling fluids Simpson Core Test 94 US Navy / BLM Low None INone No appears healthy left in hole no data Need HRR, PA, SI. No evidence of sheen, stressed veg, or drilling waste on surface. Veg csg cemented @25': open csg sticking Simpson Core Test #13 US Navy I BLM Low None None No appears healthy drilling fluids left in hole out of ground Need HRR, PA, St. _ Vegetated, no evidence of csg cemented @20', open csq sticking Simpson Core Test #14 1 US Navy/ BLM lLow lNone lNone lNo 1 release. drilling fluids left in hole out of ground _ Page 6 of 14 SPAR Response with Legacy Wells List.xlsx Page 7 of 14 ___ EvidenceoT___ BLM 2013 Risk Historic AOGCC Subsurface AOGCC Surface Well Name Operator I RP I Land Mgr Priority CSP Status File #/Hazid Release? SPAR Ifflorkgroup Notes Status Status Re —ed 7TR—R 7'A_!5"_ open casing Vegetated, no evidence of csg set shallow; drilling sticking out of Simpson Core Test #14a US Navy / BLM Low None None No release. fluids left in hole ground Need HRR, PA, SI. open casing Vegetated, no evidence of csg cemented @18'; sticking out of Simpson Core Test #15 US Navy / BILM Low None None No release. drilling fluid left in hole ground . Need HRR, PA, S1. Site photos appear to show oil at surface, from a natural csg @ 350'. Completed in oil seep; seep, also drilling mud in oil well. Open perfs. At wellhead sticking sacks on the tundra. one time capable of up. metal debris Simpson Core Test #26 US Navy / BLM Medium None None Yes Plugged by BLM in 2004. unassisted flow. and rusting barrels Need HRR, PA, SI. Site photos appear to show oil csg cemented at surface, from a natural @102';drilling fluids on oily ground; csg seep. Plugged by BLM in including diesel and & wellhead stick Simpson Core Test #27 US Navy BLM None None None Unknown 2004. crude oil left in hole out of ground Need HRR, PA, Workplan for Sl with Sampling. Drilling Mud Assessment. open csg sticking Surface Cleanup. Site out of ground in photos appear to show a wooden cellar; pile of drilling mud about csg @110'; drilling fluids wood & metal Simpson Core Test #28 US Navy BILM Low None None Yes 100 feet from the well left in hole debris. Solid waste Need HRR, PA, Sl_ No evidence of sheen, stressed veg, or drilling waste on surface. Veg r-sg cemented at 152'; open csg. Wood Simpson Core Test #29 US Navy BLM Low None None No appears healthy drilling fluids left in hole and metal debris Need HRR, PA, SI. Drilling mud at surface, but well is also in the middle of a large in oil seep; open oil seep and surrounded by csg sticking up; pooled oil. Plugged by BLM csg cemented at150'; wood & metal Simpson Core Test #30 US Navy BLMI Low None INone Yes, see notes in 2004. drilling fluids left in hole debris Need HRR, PA, SI. Well is on oily ground-, csg in the middle of a large oil & wellhead stick seep and surrounded by csg cemented at 100" out of ground, pooled oil. Plugged by BLM drilling mud left in hole; wellhead leaking Simpson Core Test #30a US Navy BLM Low None None Yes, see notes in 2004. gas blowout at 423' _ gas Need HRR, PA, S1. Leaky valve replaced in 2001, little evidence of contamination following valve on oily ground; c.sg replacement. Plugged by csg cemented at 100% & wellhead stick Simpson Core Test #31 1 US Navy I BLM [None INone INone [Yes,seenotes IBLMin2OO4. ldrilling fluids left in hole lout of ground Page 7 of 14 SPAR Response with Legacy Wells List.xlsx Page 8 of 14 -EVT�er iice o� BLM 2013 Risk Historic AOGCC Subsurface AOGCC Surface Well Name Operator I RP / Land Mgr Priority CSP Status File #/Hazid Release? SPAR Workgroup Notes Status Status tWed-qRR, PA, Wo�kplan csg cemented at for SI with Sampling. 1028';cement plugs at Drilling Mud Assessment. 6387'and 5520'; fish in Surface Cleanup. Drilling hole; drilling fluids left in No data. Open Simpson Test Well #1 (aka US Navy BILM Low None None yes muds near wellhead hole casing. Need HRR, PA, Workplan for SI with Sampling. Drilling Mud Assessment. Surface Cleanup. Also Wellhead sticking evidence of a natural seep- above ground, Tar sheens in the summer ST from 2552 to 3018. wood, metal, and months. BLM is concerned csg @2915. Slotted liner concrete debris. Fish Creek #1 US Navy BLIM Medium None None Yes about exposure to wildlife Ito TD. Completed oil well Rusting barrels Need HRR, PA, Workplan for SI with Sampling. casing cemented at 48'; Drilling Mud Assessment. gas flow and explosion Surface Cleanup. Small gas while drilling at 863'; hole leak in wellhead flange, will filled with fresh water to Wolf Creek #1 US Navy / BILM Low None None No flow if the valve is open 330' No data. csg cemented at 53';hole left filled with fresh water; Wolf Creek #2 US Navy / BLIM Low None None No Need HRR, PA, SI. fish in hole No data csg cemented at 107'; bridge plugs from 1447 to 1735'and from 554 to Wolf Creek #3 US Navy / BILM Low None None No Need HRR, PA, SI. 661' No data Add to Site list. Need HRR, PA, Sl with sampling. r-sg sticking out of Drilling mud assessment. ground with wood Surface Cleanup. Sheen on plug on top; solid surface water in well cellar, csg cemented at 30'; drill waste; wood hundreds of drums indicate pipe, drilling mud and debris; about 200 Skull Cliff Core Test #1 US Navy I BLIM High None None Yes potential for contamination diesel left in hole rusting barrels Need HRR, PA, SI. Two open csg; wood drums are floating on a building; pylons; pond near the well. csg cemented at 1000% wood & metal Kaolak #1 US Navy / BILM Low None None No Potential for burried landfill.- drilling fluids left in hole debris Page 8 of 14 SPAR Response with Legacy Wells List.xlsx Page 9 of 14 -- UVITe—n—ce—of— BLIVI 2013 Risk Historic AOGCC Subsurface AOGCC Surface Well Name Operator / RIP / Land Mge Priority CSP Status File #/Hazid Release? SPAR Workgroup Notes Status Status Add to Site list. Need HRR, PA, Sl with sampling. Drilling mud assessment. open flange @ Surface Cleanup. Drilling Gas well. Open perfs. ground level. Mud pile overgrown with Drilling fluids and Metal & wood Meade #1 US Navy 1, BLM Low None None No vegetation and lichen tubulars left in hole debris Need HRR, PA, SI. No evidence of sheen, open casing stressed veg, or drilling csg cemented at 502'; sticking out of waste on surface. Veg plug at 3470 to 351 V; ground. Wood Titaluk #1 US Navy BLM Low None None No appears healthy drilling fluids left in hole debris. Open casing below Add to Site list. Need HRR, ground level. PA, Sl with sampling. Revegetated. Drilling mud assessment. Numerous metal Surface Cleanup. Debris csg partially cemented at support structures and drilling muds. Stressed 2762'. Plug at 2543'. sticking up. Ournalik #1 US Navy / BLM Low None None Yes vegetation Drilling mud left in hole Concrete debris. plate welded to pipe, l'of pipe csg cemented at 1100'. sticking up. East Ournalik #1 US Navy / BLM Low None None No Need HRR, PA, St. Drilling fluids left in hole Wooden debris. Add to Site list- Need HRR, PA, Sl with sampling. Drilling mud assessment. Surface Cleanup. open csg broken Downhole material present csg cemented at 6073'; off and sticking up, at surface, area mostly original hole drilled to wood, metal, revegetated. Diesel still 7154'& junk left; concrete and other occupies the ground sidetrack hole left with debris. rusting Topaguruk #1 US Navy BLM High None lNone Yes circulation lines. drilling fluids barrel Add to Site list. Need HRR, PA. Sl with sampling. Drilling mud assessment. Surface Cleanup. Pile of csg to 1100'; plug at open casing drilling muds is next to the 1049'; drilling mud below sticking up. Wood, celler. No offical reserve pit plug; unknown fluids in metal, and glass East Topagoruk #1 US Navy / BLM Low None None No noted open hole debris. open casing Need HRR, PA, SI. BLM sticking up. Wood, states that there was no metal, and glass Knifeblade #1 US Navy / BLM Low None None No debris at this site in 2012. csg cemented at 420" debris. Page 9 of 14 SPAR Response with Legacy Wells List.xlsx Page 10 of 14 -Ev–ide–n-c—eot- BLM 2013 Risk Historic AOGCC Subsurface AOGCC Surface Well Name Operator I RP / Land Mgr Priority CSP Status File #/Hazid Release? SPAR Vh4orkgroup Notes Status Status open casing sticking up. Wood, metal, & concrete debris. rusting Need HRR, PA, SI. Reports barrels. One indicate solid waste csg cemented to 45';fish marked flammable Knifeblade #2 US Navy / BLIVI Low None None No (drums) in hole hazard. open casing sticking up; metal & Knifeblade #2a US Navy / BILM Low None None No Need HRR. PA, St. r-sg cemented at 38'; concrete debris Need HRR, PA, SI including leaching assessment. Site partially No wellhead. submerged intermittently csg cemented at 80'; Metal. Solid waste North Simpson Test Well # US Navy / BILM Low None None No during the summer drilling fluids left in hole ? No data crude wellhead. Need HRR, PA, S1. Surface csg cemented at 685', Wood and metal Umiat #1 US Navy / BLIVI FUDS Medium Cleanup co 335.38.001/3090 Yes, see file Cleanup drilling fluids left in hole debris No wellhead. Gravel pad partially csg cemented at 486" revegetated wood Need HRR, PA, SI. Surface cement plug from 440 to debris and pipe Umiat #11 US Navy / BLIM FUDS Low pending clos 335.38.001/3083 Yes, see file Cleanup 480'; sticking up csg cemented at 7206'; Wellhead- Gravel various plugs from 8250' pad revegetated ? South Simpson #1 US Navy / BILM Low None None Yes Need HRR, PA, SI. to surface No data Add to Site list. Need HRR, PA, Sl with sampling. Drilling mud assessment. Surface Cleanup. Large quantities of ferrous oxide, zinc oxide, zinc carbonate, and barium sulfate were added to drilling muds. Stains apparent in photos. BLM field camp on site. Walls between the reserve and flare pits have eroded. Wellhead and Water flows into surface gravel pad. ? No Inigolk #1 JUSGS/BLM I Low lNone [None IYes lwater during breakup. Ino data Idata Page 10 of 14 SPAR Response with Legacy Wells List.xlsx Page 11 of 14 BLM 2013 Risk Historic AOGCC Subsurface AOGCC Surface Well Name Operator I RP / Land Mgr Priority CSP Status File #/Hazid Release? SPAR IfYorkgroup Motes Status Status Need HRR, PA, SI, Surface Cleanup. Photo CIMG0218 csg cemented at 53'; shows area of disturbed tubing hung to 708'; hole open casing vegetation that should be left filled with drilling mud sticking up; wood & Arcon Barrow Core #1 US Navy / BLM Low None None Yes investigated during Sl and diesel metal debris open casing Need HRR, PA, SI. Surface csg cemented at 816': sticking up; wood & Avak #1 US Navy I BL Low None None No Cleanup. pluq set at 1348' metal debris Notabandoned, site not cleared, Need HRR, PA, SI. Surface open casing ?? No Barrow Big Rig #1 US Navy / BLM None -debris placA None None Unknown Cleanup. no data data Notabandoned, site not cleared, Need HRR, PA, SI. Surface open casing ?? No Barrow Core Rig Test #1 US Navy / BLM None-uncased hc None None Unknown Cleanup- no data data Need HRR, PA, Sl with sampling- Drilling mud assessment. Surface Cleanup- Drilling Muds on site -slowly revegetating. Notabandoned, More information on drilling site not cleared, mud specifics is being open casing ??No Barrow Core Rig Test #2 US Navy BLM Low None None researched no data data Need HRR, PA, Sl with sampling. Drilling mud wellhead leaking assessment. Surface cemented csg to gas!! Wood & Cleanup. Cellar does not 1270';slotted liner to metal debris. Area Iko Bay #1 US Navy / BLM - High None None Yes -Report note retain water 1950'; tbg to 1939' affected 50'x5O' Need HRR, PA, SI. Drilling csg cemented at mud assessment. Surface 441';hole left willed with open pipe; metal & South Barrow Test Well #1 US Navy/North Slope Boro Low None None unknown Cleanup. On road system water concrete debris Need HRR, PA, SI. Drilling csg cemented at 2260'; mud assessment. Surface perforated liner to TD; wood, metal & South Barrow Test Well #2 US Navy/North Slope Boro Low None None unknown Cleanup. On road system tubinq. Completed well. concrete debris Need HRR, PA, Sl with sampling and workplan. Drilling mud assessment. Surface Cleanup. Drilling csg cemented at 1046'; open csg sticking mud at surface, Sheen on hole left filled with drilling up; wood & metal South Barrow Test Well #31 US Navy/North Slope Borol medium None None Yes Isurface water in well cellar fluids and water debris Page 11 of 14 SPAR Response with Legacy Wells List.xfsx Page 12 of 14 BLM 2013 Risk Historic AOGCC Subsurface AOGCC Surface Well Name Operator / RP / Land Mgr Priority CSP Status File #/Hazid Release? SPAR YtIorkgroup Notes Status Status no data. Likely revegetated. Removed from our list of wells of concern in < 50', no csg, no API#, October, 2012 Ournalik Foundation Test A US Navy BLM None-uncased hc None None Unknown Need HRR, PA, not in AOGCC database Monthl Meeting no data. Likely revegetated. Removed from our list of wells of concern in < 50', no csg, no API#, October, 2012 Ournalik Foundation Test A US Navy BLM None-uncased hc None None Unknown Need HRR, PA, not in AOGCC database Monthly Meeting no data. Likely revegetated. Removed from Our list of wells of concern in < 50', no csg, no APl#, October, 2012 Ournalik Foundation Test A US Navy I BLM None-uncased hc None None Unknown Need HRR, PA, not in AOGCC database Monthly Meeting no data. Likely revegetated. Removed from our list of wells of concern in < 50', no csg, no API#, October, 2012 Ournalik Foundation Test A US Navy BILM None-uncased hc None None Unknown Need HRR, PA, not in AOGCC database Monthly Meeting no data. Likely revegetated. Removed from our list of wells of concern in 50', no csg, no API#, October, 2012 Ournalik Foundation Test A US Navy BILM None-uncased hc None None Unknown Need HRR, PA, not in AOGCC database Monthly Meeting no data. Likely revegetated. Removed from our fist of wells of concern in < 50', no csg, no API#, October, 2012 Ournalik Foundation Test A US Navy BLM None-uncased hd None None Unknown Need HRR, PA, not in AOGCC database Monthly Meeting Page 12 of 14 SPAR Response with Legacy Wells List.xlsx Page 13 of 14 Ev -ide-n-c-e- 64- BLM 2013 Risk Historic AOGCC Subsurface y AOGCC Surface Well Name Operator I RP I Land Mgr Priority CSP Status File #/Hazid Release? SPAR I'Vorkgroup Notes Status Status no data. Likely revegetated. Removed from our list of wells of concern in < 50', no csg, no AP I#, October, 2012 Ournalik Foundation Test A US Navy BLM None-uncased hc None None Unknown Need HRR, PA, not in AOGCC database Monthly Meeting no data. Likely revegetated. Removed from our list of wells of concern in < 50', no csg, no API#, October, 2012 Ournalik Foundation Test A US Navy I BLM None-uncased hc None None Unknown Need HRR, PA, not in AOGCC database Monthly Meeting no data. Likely revegetated. Removed from our list of wells of concern in < 50', no csg, no API#, October, 2012 Ournalik Foundation Test t US Navy BLM None-uncased hc None None Unknown Need HRR, PA, not in AOGCC database Monthly Meeting no data. Likely revegetated. Removed from our list of wells of concernin < 50', no csg, no API#, October, 2012 Ournalik Foundation Test A US Navy I BLIVI None-uncased hc None None Unknown Need HRR, PA, not in AOGCC database Monthly Meeting properly abandoned per then -applicable South Barrow #7 US Navy / BLM None None None Unknown Need HRRI PA, properly plugged regs no data to support proper Umiat #2 US Navy / BLM None Pending Clo! 335.38.001/3078 Yes, see file Pluaqed to surface abandonment no data to support proper Umiat #5 US Navy / BILM None Pending Clo 335.38.001/3078 Yes, see file Plugged to surface abandonment properly plugged and surface site Umiat #9 US Navy I BLM Hiqh-PCB deanul Active 335.38.obi/3093 Yes, see file abandoned remediated properly plugged and surface site Umiat #6 US Navy / BLM None Pending Clo! 335.38.001/3080 Yes, see file abandoned remediated properly plugged and surface site Umiat #7 US Navy / BLM one Pending Clo 335.38.001/3091 IYes, see file I jabandoned Iremediated Need HRR, PA, Plugged by properly plugged and surface site Atigaru Point #1 USGS/BLM INone None None INo I BLM in 2009. labandoned - Iremediated Page 13 of 14 SPAR Response with Legacy Wells List.xlsx Page 14 of 14 — ---- -EIV — -- BLM 2013 Risk Historic AOGCC Subsurface I AOGCC Surface Well Name Operator'/ RP Land Mgr Priority CSP Status File #/Hazid Release? SPAR Workgroup Notes Status Status Add to Site list Need HRR, PA, Sl with workplan and sampling. Drilling mud assessment. Surface Cleanup. Two large breaches on the south side of the berm allow water out of the reserve pit. Plugged properly plugged and surface site Drew Point #1 USGS/BLM None None None Yes by BLM in 2010. abandoned remediated On Site list. Need HRR, PA, Sl with workplan and sampling. Drilling mud assessment. Surface Cleanup. fn 1976 the reserve pit berm failed and drilling muds/cuttings were released onto the ice of Teshekpuk Lake- Plugged by BLM in 2008. Solid waste from camp and drilling operations buried on northern portion of pad. Erosion has exposed solid properly plugged and surface site East Teshekpuk #1 US Navy BLM None Active - waiti 300.38.110/2652 Yes, see file waste. abandoned remediated Threatened by erosion. properly plugged and surface site J. W. Dalton #1 USGS/BLM None None None No Plugged by BLM in 2005. abandoned remediated properly plugged and surface site South Barrow #8 USAF/BLM None None None Unknown Need HRR, PA, abandoned remediated properly plugged and surface site South Barrow #11 US Navy/North Slope Boro None None None Unknown Need HRR, PA, abandoned remediated properly plugged and surface site South Barrow #13 US Navy/North Slope Boro None None INone Unknown Need HRR, PA, abandoned remediated properly plugged and surface site South Barrow #15 US Navy/North Slope Boro None None None Unknown Need HRR, PA, abandoned remediated — properly plugged and surface site South Barrow #19 US Navy/North Slope Boro None None None Unknown Need HRR, PA, abandoned remediated properly plugged and surface site South Barrow #20 US Navy/North Slope Boro None None None Unknown Need HRR, PA, abandoned remediated — Need HRR, PA, drilling mud assessment, containment assessment, possible releases. Breaches allow water to flow into and out of properly plugged and surface site Walakpa #2 USGS/BLM INone None INone Yes reserve and flare pits. abandoned remediated Page 14 of 14 0 0 Well Ranking Before identifying the risks associated with the legacy wells, the BLM reviewed the list of wells to determine ownership and well status. A break -down of the 136 is as follows: 0 39 are uncased core holes that did not penetrate oil and gas zone, have naturally collapsed, and have blended harmlessly into the landscape. * 33 were either transferred to the North Slope Borough through the Barrow Gas Field Act of 1984 or were conveyed to Arctic Slope Regional Corporation. 0 20 wells are being used to by the United States Geological Survey (USGS) for climatic temperature and permafrost studies (see Appendix B). * 7 wells are plugged (6 at Umiat, Square Lake #1). 0 37 wells that require ftirther evaluation. Following the 2003 field season, members of the legacy well team met to determine criteria for evaluating the risks associated with the above mentioned 37 wells and ranking each well based on these risks. For consistency purposes, the group devised a series of questions to assist in the process: * What is the condition of the existing pad and pits? (e.g. any indication of contamination?) e Is there any solid waste (old equipment, piping, barrels, etc.) or potential hazardous material conditions? • Did the hole penetrate known oil or gas stratigraphy? • Did the well have oil or gas shows, and if so, is the well capable of flowing? • Is the well near human activity, and if so are there conditions present that pose a risk to people? * What is the condition of the wellhead? Have there been any previous problems or repair work? Does the well (in its current condition) pose a risk? * What is the surficial condition of the existing pad and pits? Is contamination a possibility? * Does the presence of unplugged wells have the potential to negatively impact anticipated development? Each of the 37 wells are described in the following pages. Descriptions are ordered in terms of the ranked priority based on the above stated criteria and the concerns identified. Umiat Wells The early Navy wells in Umiat rank at the top of the list. Umiat is located on the north bank of the Colville River 60 miles upstream from the village of Nuiqsut. Natural oil seeps were discovered at Umiat by early explorers. This discovery, along with the detection of seeps at Cape Simpson, motivated the U.S. Navy to conduct a drilling program. Urniat and the Simpson Peninsula were the primary exploration targets in the mid to late 1940s. The Umiat seeps are still visible today. Their locations tend to shift over time. The seeps are currently active in Umiat Lake, just off the northeast portion of the airstrip and in a channel of the Colville River. 22 0 0 The I I Umiat wells were drilled from 1945 to 1952. These wells are a concern for BLM due to their close proximity to human activity. Unidat is not a village, but serves as a camp for seismic crews: Umiat is also the primary hub for recreational activities in eastern NPR -A and western CAMA (Central Arctic Management Area). It has one of the few airstrips on the North Slope maintained year-round and is a popular location for purchasing aircraft fuel (Figure 10). The Urriiat wells all lie within 2 miles of the camp, with the exception of Unuat #1, which is approximately 5 miles to the northwest. After the U.S. Navy completed drilling operations in 1952, the U.S. Air Force assumed custodial responsibility at Umiat and established the 8,000 -acre F . i " ure 10: Umiat is a popular stopping point for Umiat Air Force Station. In June of aircraft. 1955 the Air Force returned the facility to the U.S. Navy. Since Umiat is a Formerly Used Defense Site (FUDS), the U.S. Army Corp of Engineers (COE) is responsible for the reduction of risk associated with surficial hazardous, toxic, and radioactive waste. The COE has conducted extensive surface investigations in the area and has identified contaminants at several locations. Varying levels of barium, petroleum, pesticides, and polychloninated biphenyl (PCB) were identified at the wellsites, the landfill, and the nearby slough (U.S. Arniy COE, 2003). Contamination levels were compared to the Alaska Department of Environmental cleanup standards and were used as a screening level. The COE has conducted site remediation at two well locations, Urniat 42 and #5 (Figure 11), an has plans to continue the surface clean up. To facilitate site remediation, the COE plugged wells #2 and #5 in 2002, but plugging the remainder of the wells is the responsibility of the BLM. Four wells were plugged by the BLM in the Winter/Spring of 2004. After the removal of wellheads #2 and #5, the State of Alaska Historic Preservation Office asked the BLM to leave all existing surface objects (wellheads, tanks, pipes) onsite and intact, because of their potential Figure 11: Umiat #2 and #5 prior to removal and historic value. The Alaska Heritage remediation. Photo taken August 2001. Resources Survey (AHRS) included the Urniat wells in an inventory of all reported historic and prehistoric sites within the State of Alaska. This inventory of cultural resources includes objects, structures, buildings, sites, districts, and travel routes generally more than 50 years old. Therefore, the wellheads for the other Umiat wells will be left in place after plugging is completed. 23 0 0 Umiat #9 Umiat #9 was spudded in June 1951 and completed seven months later in January 1952. The well is cased to a depth of 1,257 feet. The purpose of the well was to determine the western extent of the producing field. It was also the first hole in which oil-based muds were used in the Umiat area. Umiat #9 is located about half mile to the north-northwest of the Seabee pad. The drill hole penetrated several known oil and gas formations; Ninuluk, Chandler, Grandstand and Topagoruk. Hydrocarbon shows were prevalent within both the Grandstand and the Topagoruk formations. Multiple sands were perforated and tested. Production exceeded 217 barrels per day, thus seemingly showing the benefit of using an oil-based mud. However, the muds did Figure 12: Aerial view of Umiat #9. not allow the different formations to be distinguished. Cement was used in an attempt to "plug back" and isolate individual formations. Samples were taken and sent to a Bureau of Mines lab where the chemical tracer (used during drilling) was measured and the various sandstone samples were examined. This allowed a study of the different lithologies be conducted. The tracer Aroclor used in the well has raised concerns about PCB contamination. However, the well was allowed to flow for seven weeks at 200 barrels per day (Robinson and Bergquist, 1956) prior to shutting it in, possibly purging the potential contaminants. As it stands today, insufficient energy exists in the reservoir for the well to flow to surface and the wellhead has no pressure on it. The well is located within the Northeast planning boundary (see Map 2) on lease AA - 081726. There is some potential for future development to occur in the area within the next 20 years and the well has the potential to leak to surface if development occurs and may adversely affect future development. Surficial wastes around Umiat #9 could present an issue. As was common with early Navy drilling, a gravel pad was not created. Wooden debris exists around the wellhead and there is a pile of drilling muds directly to the north which is void of vegetation (Figure 12). Samples taken by the COE from around the wellhead detected elevated levels of diesel range organics (DRO), residual range organics (RRO) and PCBs (U.S. Army COE, 2003). 24 0 0 The wellhead is equipped with two bull plugs, a flange and a 2 '/4 -inch nipple. There are no i fresh water aquifers in the area, but due to potential contaminants downhole and existing contaminants on the surface, the well does pose a risk to human health and the environment in its current condition. Umiat #6 Umiat #6 was spudded August 1950 to test the southern limits of the Umiat anticline. The hole was drilled to a depth of 825 feet. The well was cased to 35 feet and a 42 -foot cement plug was placed on the bottom of the well in order to stop water influx from sands at the base of the permafrost. The well encountered very poor shows in the Killik Tongue (Chandler Formation) and a productive sand in the upper Grandstand Formation. Oil recovered in open -hole pumping tests was produced at rates averaging 53 barrels of oil per day. Insufficient energy exists in the reservoir for the well to flow to surface and there are no fresh water aquifers present. Major caving of the hole occurred and the well was backfilled with mud (Robinson and Bergquist, 1956). The well is located within the Northeast planning boundary (see Map 2) on lease AA - 081726. There is some potential for future development to occur in the area within the next 20 years and the well has the potential to leak to surface if development occurs and may adversely affect future development. The well lies about 500 feet to the northwest of a gravel spur road which connects the Colville River to the eastern edge of the Umiat airstrip. The well is located in wet tundra adjacent to an empty 55 -gallon drum. The well is left open with 8 '/8 -inch casing to the surface. It has no gauges, valves or a cover plate. Two thermistor protrude to the surface and rests on the lip of the casing. This well poses no threat to human health or the environment unless development occurs. Umiat #7 Urniat #7 was drilled in Z' 1951 to a depth of 1,384 feet, cased to 1,196 feet and completed as a dry T hole. It was the southern most well drilled on the Umiat anticline. The objective was to fuirither delineate the southern extent of the producing Figure 13: Umiat #7 summer and winter photos. field. The well encountered residual hydrocarbons in the Chandler and Grandstand formations. Oil recovered in bailing tests was so minute that it was measured in gallons. The small amount of crude recovered in each test is indicative of residual oil staining. The sands encountered in Grandstand are downdip of the productive reservoir and are water bearing. Minor gas shows were encountered at 260 feet (Robinson and Bergquist, 1956). The well is located within the Northeast planning boundary (see Map 2) on lease AA - 081726. There is some potential for future development to occur in the area within the 25 0 next 20 years but since the well is located below the oil/water contact it has less potential to be adversely affected or affect future development. The wellhead assembly consists of 7 -inch casing (with collar) clamped inside I I Y4 -inch casing at a total height of 30 inches (Figure 13). Surrounding the open hole is wet tundra with no indication of remaining debris or other surficial issues. The hole poses no threat to humans or the environment. The well location is currently situated on Alaska Dept. of Transportation land that was transferred in 1966, but the well remains the property of the BLM. Additional Utniat Work Umiat has been a site of recent cleanup projects. The cleanup process began in 1994 with the removal of about 1,000 drums, some containing petroleum and transformer oil with PCBs, from the main gravel pad. Another 200 cubic yards of PCB -contaminated soil was removed in 1998 along with 60 cubic yards of lead -contaminated soils. In 2001, 50 cubic yards of PCB soil was excavated with an additional 10 cubic yards removed the following year by the Corps of Engineers (U.S. COE, 2003). J.W. Dalton #1 J.W. Dalton #1 was drilled in 1979 to a depth of 9,367 feet. It is cased down to 8,898 feet and plugged back to 1,530 feet. (Husky Oil NPR Operations for U.S. Geological Survey-J.W. Dalton, 1982). The primary objective of the well was to determine if hydrocarbons were present within the Sadlerochit and Lisburne Groups. Gas shows were encountered in trace amounts in the Ivishak Formation, and the Lisburne and Endicott Group. Poor to good oil shows were discovered in the Ivishak Formation and in the Lisburne Group. A drillstem test of the Lisburne Group recovered 22 barrels of oily water (Gyrc, 1988). This well has been a USGS monitor well since its completion in 1979. Approximately 230 barTels of diesel fuel were placed downhole to act as a neutral medium for collecting wellbore temperatures. In the summer of 2004, warmer temperatures, wind, and wave action eroded 200 feet of the coastline adjacent to the well (Figures 14, 15). This erosion placed the J.W. Dalton #1 well and reserve pit precariously close Figure 14: Photo of J.W. Dalton taken October 26, 2004. Soil cracking is occurring around the wellhead and the north and east side of the cellar is exposed. Figure 15: J.W. Dalton wellhead with pilings. Photo was taken August 2000. NES, 0 f fl, A f, +I- M %, %, r,-- ki e Arctic cean. As a result, casing is now exposed to a depth of 15 feet on the present day beach (Figure 16). The top of the diesel is approximately 60 feet below the present beach level. The reserve pit has been breached on the northwest comer from the advancing shoreline (Figure 17). The pit is known to contain chromium, cobalt, zinc, and barium. However, chromium, cobalt and zinc were detected in background levels, due to the east -west water movement into and out of the pit. Barium is a constituent of the drilling muds and is consolidated with other sediments (U.S. Bureau of Land Management, U.S rigure 16: J.W. Dalton with exposed conductor (left), and rat hole (right). The mouse hole (not pictured) is completely exposed. Geological Survey, 1992). The well is located within the Northeast planning area (see Map 2), on a tract currently closed to leasing. This well is in danger of becoming engulfed by the ocean. The diesel fuel in the well and reserve pit contaminants raises concerns. The concerns can be In its current condition, the well does not pose a threat to humans or the environment, but if the casing were to break in its exposed condition, the diesel fuel would, over time, leak into the ocean. The release of heavy metals from the reserve pit may pose an immediate risk to human health and the environment. The pit was sampled October 26, 2004, and results are pending. 27 0 0 Figure 18: Simpson Peninsula showing well locations. Simpson Core Test #26 Simpson Core Test #26 was drilled in the middle of one of the larger, active oil seeps in NPR -A (Figure 19). The Navy described this location as Seep 3. The hole reached a total depth of 1,171 feet and was cased to 350 feet. The well encountered one very poor gas show and one productive oil sand in the Ninuluk/Seabee undifferentiated formation. In production tests, the well flowed at rates averaging I 10 barrels of oil per day (Robinson and Brewer, 1964). Other formations encountered include the Gubik, Seabee, and Grandstand Formations. Gas bubbles have been observed around the base of the casing since the 2000 field season. Bob Burruss of the USGS, sampled and analyzed gas from Simpson Core #27 which is part of the same oil field, located less than half mile to the east. His findings showed the gas to be biogenic methane indicating that microbial alteration (breakdowns) of the hydrocarbons has generated the gas. Additionally, oil sampled in the well uinc �-vtr,-rn,-J A .4 Q Figure 19: The wellhead is located in the center of J rl " %, . 11j.1FaV.L'L the photo. The green color liquid defines the area Core #26 has a wellhead flanged to the of active seepage. The orange color is oil -eating casing, a 2 -inch line pipe, and four bacteria. wing valves and will likely flow oil if 28 0 the valves are opened. Access to the wellhead is limited by the depth of oily -water surrounding its base (Figure 20). There are no concerns with contaminating fresh water aquifers if the well is left unplugged, but the well could potentially flow oil and cause IM damage to surface resources if the well equipment corrodes or, through human intervention, the well is opened or damaged. The well is located within the Northwest planning boundary (see Map 2). The tract was recently leased, receiving a high bid of $7.51 per acre during the NW NPR -A lease sale of 2004. Exploration and development is a distinct possibility within the next 20 years but it is unlikely this well will have an adverse impact on development since any development will likely target deeper, more productive formations. The area around the wellhead looks to have been bulldozed in cul a %;;;Mpt LO C0.1leCL Me seeping Figure 20: Simpson Core #26 drilled in the middle of an oil. The scraped -up earth was oil seep. Depth of the oily -water prohibits access to the then used to build berms around wellhead. the depression. Light amounts of trash appear to have been buried in these berms. The Navy cleaned up the site in the late 70s, removing most of the drums and other debris, but solid wastes, including half barrels and other drums can be found in the wet tar that fills the depression. Simpson Core Test #31 Simpson Core Test #31 is a shallow core test drilled in 1951 to a depth of 355 feet and o collect a core to view the material at the bottom of the seep. The well does not meet standard oil and gas exploration well definitions. The casing is not cemented in place and the well is probably not capable of holding substantial pressure. The well encountered a few sands with shows and one productive sand in the Ninuluk/Seabee undifferentiated formation. In 65 hours of testing, this zone flowed oil to the surface at rates averaging 125 barrels and 2,000- I, igure 21: Simpson Core #31 is located within an 4,000 cubic feet of gas per day. active oil seep. Flowing pressure was measured at 60 29 0 0 psi. The well also penetrated the Gubik and Seabee Formations, which were unproductive (Robinson and Brewer, 1964). The well is located within the Northwest planning boundary (see Map 2). The tract was recently leased and received a high bid of $7.51 per acre during the NW NPR -A lease sale of 2004. Exploration and development is a distinct possibility within the next 20 years but it is unlikely this well will have an adverse impact on development since any development will likely target deeper, more productive formations. A drilling pad does not exist as the well was drilled in an active oil seep, which remains active today (Figure 2 1). The Simpson Peninsula contains few permanent settlements, but a multitude of summer camps. The well had been a source of fuel for the inhabitants as evidenced by a 10 -foot extension pipe hooked up to the wing valve. The extension allowed for the oil to flow down the pipe and collect in a bucket. In 2000, BLM learned that oil was seeping out of a corroded swedge on the wellhead. The potential harm was mitigated by the fact oil was seeping into a natural oil seep. In June 2001, BLM spent $35,000 to remove the old wellhead and install a new master valve and needle valve. Oil and gas samples were taken by the USGS prior to the replacement. There are no fresh water aquifers in the well so there are no risks to sub -surface resources but there are risks to surface resources if the well is left unplugged. Oil will flow to surface if the wellhead or casing corrodes or if the well is left open. There are no solid wastes or hazardous materials (besides the natural oil) that would present a concern or pose a risk to the health and safety of the land and people. Simpson Core Test #30A Simpson Core Test #30A is an oil well drilled in 1951 to a depth of 693 feet and cased to 152 feet. The well encountered some very poor gas shows and one productive sand in the Ninuluk/Seabee undifferentiated formation. The well was bailed and averaged oil rates of 6 barrels per day during bailing tests (Robinson and Brewer, 1964). The well is located within the Northwest planning boundary (see Map 2). The tract was recently leased and received a high bid of $7.51 per acre during the NW NPR -A lease sale of 2004. Exploration and development is a distinct possibility within the next 20 years but it is unlikely this well will have an adverse impact on development since any development will likely target deeper, more productive formations. The wellhead consists of casing swedge, a nipple, and a brass gate valve and will flow oil to surface if the valve is opened. There are no sub -surface fresh water aquifers at risk. However, if the well is left unplugged it could pose a risk to surface resources. In its current state, oil could flow to surface if the well is damaged, corroded, or the valves are opened. Additionally, concerns have been raised regarding the bubbling around the base of the casing. When the valve is opened, the bubbling subsides. This indicates a small leak around the base of the casing or through a hole in the casing. The gas was sampled by the USGS and has been identified as reservoir -produced biogenic gas. While the well does pose a risk, it is mitigated by the fact that the well is drilled in an active, natural oil seep. 30 0 Simpson Core Test #30 0 Simpson Core Tests #30 and #30A were drilled about 100 feet apart in the same oil seep. The seep is part of the same regime that contains Cores #26 and #27. These wells were drilled to gain an understanding of the producing field limits and to help determine underlying structure. Simpson Core #30 is an oil well drilled in 1951 to a depth of 1,500 feet. No plugs were set and the well was cased to 102 ft. The hole encountered the same formations as Cores #26 and #27; Gubik, Seabee, undifferentiated Ninuluk/Seabee, and the Grandstand with a few poor gas shows and one productive sand 'in the Niuluk/Seabee undifferentiated formation. Poor oil shows were also noted in the deeper Grandstand Formation. During production tests of the shallow oil sand, the well was bailed at rates averaging 5 barrels of oil per day (Robinson and Brewer, 1964). Figure 22: Light trash is present in the seep between Cores #30 and #30A. The well is located within the Northwest planning boundary (see Map 2). The tract was recently leased and received a high bid of $7.51 per acre during the NW NPR -A lease sale of 2004. Exploration and development is a distinct possibility within the next 20 years but it is unlikely this well will have an adverse impact on development since any development will likely target deeper, more productive formations. The well was left with sheared, open casing above ground. Even though the well produced oil 50 years ago, it is static today. This suggests the hole has collapsed below the shallow casing. There are no fresh water aquifers in the well, however, since the well was drilled to a reservoir with sufficient energy to flow oil to surface, the well should probably be considered a risk if left unplugged. This well would probably be plugged by placing a 100 foot surface plug downhole to eliminate risks to surface resources. The potential risk is alleviated by the fact that the well is drilled in an active, natural oil seep. There is no drill pad as the Navy drilled within the seep and camped on the tundra. Some light trash is present in the seep between the Core #30 and Core #30A, which may prove difficult to clean (Figure 22). The well lies three tenths of a mile from both Core #26 and #27 (Figure 18). Simpson Core Test #27 Simpson Core Test #27 is an oil well that was spudded February 1951 and completed one month later. Total depth of the well is 1,500 feet, with casing down to 102 feet. Oil was encountered at a depth of 380 feet and was bailed at a rate of 3 barrels per day. The core test encountered the same formations as Simpson Core Test #26, with a few very poor gas shows and one productive oil bearing sand in the Ninuluk/Seabee undifferentiated formation. Oil-based muds were used from the drilling depth of 325 to 661 feet. At that point the oil was displaced and the drilling crew resumed using water based muds. 31 0 Figure 23: There is no surface debris el present at Simpson Core #27. 0 Additional crude was added downhole at a depth of 1,320 feet. The drill pipe was stuck and the two front derrick legs collapsed below the four -foot extension in an effort to free the pipe. The drilling muds in place were re -circulated during the repair process. In an attempt to free the pipe, 73 barrels of crude and 23 barrels of diesel were used to replace the muds and the pipe was worked free. The oil was gradually replaced by mud as the drilling continued, however, some oil remained in the hole after completion. The crude used downhole came from Simpson Core Test #26 (Robinson and Brewer, 1964). There are no fresh water aquifers in the well so there are no risks to sub -surface resources but there are risks to surface resources if the well is left unplugged. Oil could flow to surface if the well equipment corrodes, the well is damaged, or left open. This potential risk is mitigated by the fact that the well is drilled in an inactive, natural oil seep. The well is located within the Northwest planning boundary (see Map 2). The tract was recently leased and received a high bid of $7.51 per acre during the NW NPR -A lease sale of 2004. Exploration and development is a distinct possibility within the next 20 years but it is unlikely this well will have an adverse impact on development since any development will likely target deeper, more productive formations. There is no existing pad. The wellhead consists of 8 '/8 -inch casing, a flange and a brass gate valve. The casing was set in a small inactive oil seep. It will flow oil to surface if opened. There is no surface debris present at Core #27 (Figure 23). The well poses little threat to human health and the immediate environment around it in its current condition. Simpson Core Test #29 Simpson Core Test #29 is a dry hole drilled in 1950 to a depth of 700 feet and cased to 152 feet. The purpose of the well was to determine the limits of the producing field encountered at Core #26. A very poor oil show was identified in the Seabee Formation. The productive sand present in the other Simpson Cores does not exist in this well. The test hole also penetrated the Gubik and Grandstand Formations. No oil was recovered from this well (Robinson and Brewer, 1964). The well is grouped higher on the priority list due to its close approximation to Simpson Cores #26, #27, #30 and #30A (Figure 18). The well is located within the Northwest planning boundary (see Map 2). The tract was recently leased and received a high bid of $7.51 per acre during the NW NPR -A lease sale of 2004. Exploration and development is a distinct possibility within the next 20 years but it is unlikely this well will have an adverse impact on development if left unplugged since any development will likely target deeper, more productive formations. The well was left with 8 V2 -inch casing, open to the atmosphere at a height of 6 inches. Thermistor cables protrude from the casing. It is located in a four-by-four foot wooden 32 0 cellar filled with water. A drilling pad was never established. There is some light trash around the wellhead including drill pipe, and various sized wooden scraps. A small barrel pump and other small debris can be seen in the casing and within the cellar (Figure 24). This well poses no threat to the human population or the environment. Umiat #1 I* Figure 24: Simpson Core #29 Umiat #1 was spud in 1945, and completed in 1946. Total depth reached was 6,005 feet and the well was cased to 685 feet. The well encountered residual hydrocarbons and a few poor gas shows in the Seabee, Ninuluk, Chandler, Grandstand, and Topagoruk Formations. The sands of the Grandstand were outside the productive area encountered by other Umiat wells, which are located five miles to the east. Oil recovered in bailing tests was so minute that it was measured in pints and officially recorded as a trace. Lab tests determined the oil to be of a different type of crude oil than that found in the productive Umiat wells (Robinson and Bergquist, 1956). The small amount of crude recovered in each test is indicative of residual oil staining. No fresh water aquifers exist in the Umiat area, so this well poses no threat to sub -surface water resources. There is no pressure on the wellhead and it is fitted with a blind plate, a 2 -inch nipple and a brass gate valve (Figure 25). The well is located on an unleased tract at the crest of a hill that divides the north and south forks of Seabee Creek. Future development is unlikely because of its location outside the Umiat structure. Left unplugged, the well poses no threat to the environment and has no potential to adversely affect ftiture development. The surficial. landscape is dominated by willows with the exception of three piles of drilling muds that are located to the east and north of the wellhead. Vegetation is absent on the slick, clay - type material. The COE tested the piles and found them to be contaminated with barium, Figure 25: Umiat #1 is located about 5 which is not surprising given that barite is a miles from the Umiat airstrip. common drilling fluid component. Through sampling, the COE determined the barium has not migrated down the hill and poses no danger to the Seabee Creek drainage (Ecology and Environment, 1999). There is no 33 0 0 indication of stressed vegetation down -gradient fi-om the drill muds. Additionally, solid waste in the form of steel framing and scrap metal are near the wellhead. The solid wastes pose no threat but are unsightly. Umiat#ll Umiat #11 was spud June 1952 and completed two months later. The well reached a total depth of 3,303 feet with 486 feet cased. One cement plug was placed at 440 feet. The objective was to test production possibilities of the Grandstand Formation on a fault that parallels the Umiat anticline. The well encountered residual hydrocarbons in the Seabee, Ninuluk, and Grandstand Formations but no oil or gas was recovered during production tests. The sands of the Grandstand were outside the productive area encountered by other Umiat wells, which are over one mile to the south. The well is located within the Northeast planning boundary (see Map 2). The tract is located on lease AA -084141 but there is little possibility of the well interfering with future development due to its location outside the Umiat structure. The well was drilled in the alluvial plain of Bearpaw Creek, 0.6 miles from Umiat #8. A drilling pad was never created as operations consisted of mounting the drill rig on a sled and then placing it on top of large timbers that were secured to pilings (Robinson and Bergquist, 1956). A pile of unvegetated drilling muds is present 30 feet west of the wellhead in between the wellhead and the creek. The wellhead consists of a 10 '/4 -inch open-ended casing with a collar sticking up inside a 30 -inch conductor that is filled with water. Minor wood debris can be found around the wellhead. The well poses no risk if left unplugged. Wolf Creek Area Three test wells were drilled in the Wolf Creek area. The wells were drilled in the early 1950s with the intent of testing the northwest -trending Wolf Creek anticline structure. Wolf Creek # I and #3 (Figure 26) are located at the crest of a hill with about 250 feet of relief from the valley. Wolf Creek #2 is located about one and one- third miles north within the Wolf Creek valley. Wolf Creek #2 and #3 are open holes but Wolf Creek #1 is equipped with a wellhead. Figure 26: Wolf Creek #1 after adding a new ball valve to the wellhead. August 2004. Wolf Creek #1 Wolf Creek #1 is a gas well drilled in 1951 to 1,500 feet and cased to 48 feet. The well encountered very poor gas shows in the Killik Tongue and productive sands in the Grandstand Formation. The well produced at rates up to 881 MCFPD in open hole tests 34 of the Grandstand. The well is equipped with a blind plate, a 2 -inch nipple and a brass gate valve (Figure 26). There is a small gas leak in the threaded wellhead flange and, if the valve is opened, the well will flow about 10 MCFPD but the pressure is so low it does not register on a gauge. In its current condition, the well does not appear to pose a risk to surface or sub- surface resources. The drill pad is shared with Wolf Creek #3. Throughout the pad, there are some wooden pilings, metal anchors and scrap metal. The scraps should not be considered hazardous in this remote region. The leaking gas is of minor concern, however given the weak gas pressure and remote location; the overall risk is very minimal. Wolf Creek #2 Wolf Creek #2 is a dry hole. The well was drilled in 1951 to 1,618 feet and cased to 53 feet. It is located roughly I V4 miles north of the other Wolf Creek test wells. The purpose of drilling was to determine if the gas -bearing sandstone beds previously encountered in Wolf Creek #1 would contain any oil. The records indicate a very poor gas show was encountered in the Killik Tongue but no oil or gas was recovered in production tests (Collins and Bergquist, 1959). The hole also penetrated the Seabee, Ninuluk, Chandler, and Grandstand Fon-nations. r igure L7: Wolf Creek #2 had casing cut off at ground level. The well is located on an unleased tract within the Northwest planning area (see Map 2). No offers were received in the June 2004 lease sale for the tract and near-term development is unlikely, The wellhead consists of a plate welded onto the I I Y4 -inch casing cut off at ground level (Figure 27). There is no existing drill pad. Solid wastes consist of a few empty 55 -gallon drums upstream along the upper floodplain of the creek. The well poses no threat to surface or sub -surface resources and has no potential to adversely affect future development. Wolf Creek #3 Wolf Creek #3 is a gas well. The well was drilled in 1952 to a depth of 3,760 feet and cased to 625 feet. It is deeper than the other two Wolf Creek wells because its primary purpose was to test the Grandstand Formation (the producing formation around Umiat, 35 miles to the west). The Grandstand Formation produced from four different sands. In 35 0 0 open hole flow tests of the well produced at rates up to 445 MCFPD. The gas appeared to be sufficient to supply a small camp, but not of commercial proportions (Collins and Bergquist, 1959). Two plugs were set in the well above the Grandstand Formation. The top of the shallowest plug is inside the casing at 554 feet. In addition to the Grandstand, the hole penetrated the Ninuluk, Chandler, and Topagoruk Formations. Upon abandonment, the hole was filled with oil-based drilling muds and left open to the envirom-nent. A total of 103 barrels of crude were used. The well is located on an unleased tract within the Northwest planning area (see Map 2). No offers were received in the June 2004 lease sale for the tract and near-term development is unlikely. The well poses no threat to surface or sub -surface resources and has no potential to adversely affect future development. The drill pad is shared with Wolf Creek #1. There is some minor debri's at the site as noted 'in the Wolf Creek #1 description. The wellhead was cut off six inches from the ground surface. This allows seasonal precipitation to accrue in the hole and spill over the sides, but the well poses no threat to surface or sub -surface resources and has no potential to adversely affect future development. Fish Creek #1 Fish Creek #1 was drilled by the Navy in 1949 near an oil seep. Total depth of the well was 7,020 feet. The well was plugged back to approximately 2,550 feet, drilled to a new total depth of 3,018 feet and eased to 3,017 feet. The well was drilled to test a large gravity anomaly that suggested the possible presence of petroleum -bearing rocks and some structural anomaly that might be a trap for oil. Very poor oil shows were identified in the Topagoruk Formation at depths from 5,550 - 6,000 feet and a productive sand was reported at 3,000 feet. The well is not a flowing well but was pump -tested at rates averaging 12 barrels of oil per day through a gravel -packed completion. It also produced a small amount of methane gas. The hole encountered the Gubik, Shrader Bluff, Tuluvak, and Seabee Formations. Current condition of the wellhead is that it has no pressure at surface and consists of two wing valves and a master valve. The well is located within the Northeast planning area (see Map 2) on lease AA -081857 where, in 2004, ConocoPhillips Alaska Inc. drilled an exploratory well within seven miles. The target of the exploration is in the Upper Jurassic at depth of approximately 8,000 feet and it is not likely that this unplugged well will adversely affect development in the area. The recent Alpine Satellites EIS approves oil and gas development in this area. ConocoPhillips has proposed roads and a drilling pad less than eight miles from this well and will likely be 36 0 0 producing by 2008. Given the low level of risk, the plugging of this well should be postponed until infrastructure is established. Surficially, there are still some solid wastes present. The drilling pad and cellar construction consists of concrete reinforced with steel matting. The concrete, matting, and pilings are still in place today, albeit heaved by permafrost (Figure 28). Several 55 - gallon trash drums filled with debris are located off the concrete pad. Other light debris is also present within 500 feet of the pad. The oil seep is located about 1.5 miles to the southwest of the well site and is inactive. The USGS 305-1 reports the dimension of the seep as being 6' x 20' (Florence and Brewer, 1964), however, BLM personnel located the seep in 2001 and noted its dimension to be 3' x 6'. Simpson Core Test #28 Simpson Core Test #28 was drilled in September 1950 to a total depth of 2,505 feet and cased to I 10 feet. Despite the depth, the hole did not encounter any hydrocarbon shows. The well is located within the Northwest planning area (see Map 2) on a recently leased tract that received a high bid of $21.51 per acre during the lease sale of 2004. Exploration and development is a distinct possibility within the next 20 years but it is unlikely this well will have an adverse impact on development since the well did not penetrate productive zones and future development will likely target deeper, more productive formations. A drill pad does not exist, however a large area of disturbance is visible. The wellhead consists of open casing inside a wooden cellar. There is considerable solid waste near the well. These include: numerous metal pilings, drill pipe, large wood fragments (spool, plywood, timbers), and some partially crushed drums. The solid wastes are unsightly, but pose no threat to humans or the environment. Simpson Core Test #13 Simpson Core Test #13 was drilled in the summer of 1949. It was a relatively shallow test and did not generate any significant oil or gas shows. The well encountered residual hydrocarbons in the Seabee and Grandstand Formations at depths of 1,079 - 1,084 and 1,138 - 1,148 feet (Robinson and Brewer, 1964). No oil or gas was recovered during production tests. The well is over three miles north of the Simpson Core wells that penetrated productive Grandstand sands. Total depth of the well reached 1,438 feet. The top 26 feet are cased and the hole was filled with water-based drilling mud. Fresh water aquifers were not encountered. The well is located within the Northwest planning area (see Map 2) on a recently leased tract that received a high bid of $21.51 per acre during the lease sale of 2004. Exploration and development is a distinct possibility within the next 20 years but it is unlikely this well will have an adverse impact on development since the well did not penetrate productive zones and future development will likely target deeper, more productive formations. 37 9 0 A drilling pad does not exist. Seven-inch casing was cut off at ground level and is very difficult to locate. The well is open to the atmosphere. There is no solid waste, nor is there anything hazardous regarding this location. It should not be considered a risk to surface or sub -surface resources. Simpson Core Test #15 Simpson Core Test # 15 was drilled in August 1949 near an active oil seep. The well was drilled to a total depth of 900 feet and cased to 18 feet. The well encountered only residual hydrocarbons in the Ninuluk/Seabee and Grandstand Formations (Robinson and Brewer, 1964). No oil or gas was recovered during well tests. Additionally, fresh water aquifers were not encountered. The well is located within the Northwest planning area (see Map 2) on a recently leased tract that received a high bid of $21.51 per acre during the lease sale of 2004. Exploration and development is a distinct possibility within the next 20 years but it is unlikely this well will have an adverse impact on development since the well did not penetrate productive zones and future development will likely target deeper, more productive formations. There is no existing pad. The well was drilled about '/8 of a mile north of a natural seep. The well consists of open ended casing with a height of 18 inches (Figure 29). The area is clean with no solid waste. This well poses no risks to the environment or human activities. Simpson Core Test #14 Simpson Core Test #14 was drilled in 1949 to a depth of 290 feet. The records do not clearly state how much casing was run but the well was left with casing above ground open to the atmosphere. Its present day location lies within 1000 feet to the west of an active oil seep. The well was not drilled deep enough to encounter the hydrocarbon stained sands evident in the Simpson Core #I 4A well. The well is located within the Northwest planning area (see Map 2) on a recently leased tract that received a high bid of $21.51 per acre during the lease sale of 2004. Exploration and development in the area is a distinct possibility within the next 20 years. This shallow well did not penetrate any hydrocarbon bearing zones and poses no risk to surface or sub- surface resources, nor does it have the potential to adversely impact future development, 38 0 9 Simpson Core Test #14A Simpson Core #14A was drilled in 1949 to a depth of 1,270 feet and casing was set to a depth of 32 feet. The well encountered only residual hydrocarbons in the Ninuluk/Seabee and Grandstand Formations. No oil or gas was recovered during tests (Robinson and Brewer, 1964) and fresh water aquifers are not present. Present day location of the well is approximately 1000 feet to the west of an active oil seep. The well is located within the Northwest planning area (see Map 2) on a recently leased tract that received a high bid of $21.51 per acre during the lease sale of 2004. Exploration and development is a distinct possibility within the next 20 years but it is unlikely this well will have an adverse mipact on development since the well did not penetrate productive zones and future development will likely target deeper, more productive formations. East Simpson #2 East Simpson #2 was drilled in 1977 to 7,505 feet and cased to 6,427 feet. Five cement plugs were set, with the top of the shallowest plug set at 1,997 feet. The primary objective of the well was to test the Ivishak Sandstone where it onlaps the Pre-Devomian age basement rock (Husky Oil NPR Operations for U.S. Geological Survey, 1982). Small scale faulting was found between the wells in the area, possibly accounting for the thin section representing the Sadlerochit Formation. The well encountered very poor oil shows at 6,000 feet in the Torok Formation and Endicott age sandstones were cored with poor porosity and dead oil shows. The well is officially listed as a dry hole. Upon completion of the production tests, the well was plugged back to 1,997 feet and filled with approximately 280 barrels of diesel to facilitate permafrost temperature measurements. However with East Simpson #1 less than five rmiles away, the USGS has no plans to use this well for temperature monitoring. The well is located within the Northwest planning area (see Map 2) on a recently leased tract that received a high bid of $21.51 per acre during the lease sale of 2004. Exploration and development is a distinct possibility within the next 20 years but it is unlikely this 39 9 0 well will have an adverse impact on development. If this exploration and development establishes infrastructure nearby, it would greatly facilitate plugging this well and significantly reduce costs. Figure 31: East Simpson #2 is partially submerged during the spring thaw. Photo taken June 2003. Kaolak #1 The wellhead consists of a casing head, side gate valve, a master gate valve, and a needle valve. The drilling pad is of the thin pad variety and is slowly being reclaimed by natural processes. Exposed pilings stick up a height of two feet from the surface, but no other objects needing removal are present (Figure 3 1). The cellar is a wooden 12' x 12' with standing water. With the existing plugs and the static condition of the well, there is no risk to surface or sub -surface resources. The well is located on an unleased tract, in Southern NPR -A (see Map 2) where a lease sale is scheduled for 2008. Exploration and development in the area is a possibility within 40 the next 20 years, but since this well did not penetrate productive oil and gas zones it will not have an adverse impact. There are no major surface issues. The working area is still visible due to a multitude of wooden pilings around the wellhead and a cabin on the north end of the pad (Figure 32). Off the pad, the area is clean. The wellhead is missing its upper components. All that remains is the top flange above the base plate and the casing spool, leaving I I 1/4 -inch casing open to the environinent. The well is left with a casing head and is open to atmosphere. The wellsite is 45 miles southwest Wainwright, which is the nearest community. There are no hazardous materials or anything that would pose a risk to the general health and safety of the land. The cabin may be a concern, but dealing with the situation is outside the scope of this report. Meade #1 Meade #1 is a gas well drilled to a depth of 5,305 feet in 1950. The well was eased to 2,785 feet and two cement plugs were set, with the top of the shallowest plug tagged at 2,783 feet inside the casing. The well encountered some gas shows in one productive sand within the Grandstand Formation. The gas tested at rates up to 1. 1 MMCFPD during openhole flow tests of the sand at 2,949 - 2,969 feet. The well is estimated to have gas reserves of 10 BCF. Gas pockets are relatively common in this portion of NPR -A due in large part to the underlying coal. At one point while conducting tests, some problems were encountered while attempting to pull a testing tool out of the hole; a ball -peen harnmer was inadvertently dropped downhole, causing the tubing to stick. The tubing could not be freed and as a result, it twisted off leaving tubing in the hole. When the lost tubing could not be pulled out, heavy muds were pumped downhole and the well was abandoned (Collins and Bergquist, 1958). The well is located within the Northwest planning area (see Map 2). The well is adjacent to a recently leased tract that received a high bid of $10.26 per acre during the 2004 lease sale. Exploration and development is a distinct possibility within the next 20 years and has the potential to target the Grandstand Formation. If left unplugged the well has no potential to adversely affect future development. There is no pad present at Meade #1 Figure 33: Meade #1 wellhead. Several pilings and light trash are present, but s at ground level and consists of an open flange bolted to the top of the casing (Figure 33). This differs from the Navy reports that indicate the wellhead was abandoned in place. There is no record as to why it was removed. A BLM field crew bailed the hole and discovered a swedge and 2 -inch needle valve junked downhole. This site is very remote (30 miles south of Atqasuk) and since the gas zones are currently isolated below the cement plugs there is a limited risk of adverse impacts to surface or sub -surface resources. 41 0 Titaluk #1 0 Titaluk #1 was drilled in 1951 to a depth of 4,020 feet and is a dry hole. The well was drilled on the end of an anticline to test the oil and gas potential of formations within the Nanushuk Group. A few very poor oil and gas shows were encountered in the Grandstand and Topagoruk Formations, but no oil or gas was recovered during multiple production tests. The Ninuluk and Chandler Formations were also encountered, but with no shows. One cement plug was set at 3,471 feet. The placement of this plug is curious since the shows (albeit poor) were reportedly discovered above this level (Robinson and Bergquist, 1959). The well remains in a static condition. Titaluk #I is located within the Northwest planning area (see Map 2) on an unleased tract. No offers were received in the June 2004 lease sale. Near-term development is unlikely. Surficially, there are no concerns with this well. The well is open, 10 1/4 - inch casing above ground to a height of 3 feet. It is open to the atmosphere. The area of disturbance is comnletelv reve ated Figure 34: Titaluk #1 wellhead with wooden cellar. t�' with no solid waste concerns. The wooden cellar is in a state of disrepair and filled with water (Figure 34). The site is clean with very little debris. There are no hazardous conditions associated with the surface. The nearest settlement is Umiat, 60 miles to the east. The well poses no risks to human safety or the environment. Skull Cliff Core Test #1 Skull Cliff Core Test #1 was drilled in 1947 to a depth of 779 feet and is a dry hole. No shows of oil or gas were reported while drilling through the Gubik, Grandstand, and Topagoruk Formations. While drilling to the target depth of 1,500 feet, the drillstring was lost in the hole and fishing attempts were unsuccessful in recovering the lost drillstring. The drilling mud was bailed down to the top of the fish and the remainder of the well was filled with diesel to 54 feet to prevent the wellbore from freezing and facilitate downhole temperature measurements. It is plausible that the casing could corrode and the diesel fuel could seep into the sub -surface strata, but since there are no fresh water zones in the well it is not considered a risk that would adversely impact sub -surface resources (Collins and Brewer, 1961). The well is located within the Northeast planning area (see Map 2). The well lies adjacent to a recently leased tract that received a high bid of $10.77 per acre during the 2004 lease sale. Exploration and development is a distinct possibility within the next 20 years but it 42 0 0 is unlikely this well will have an adverse impact on development since industry will likely target deeper, productive formations. An oil seep located at the base of Skull Cliff (land/ocean contact) was observed and documented in the 1940s, which influenced the Navy's decision to drill. BLM and USGS crews searched for the seep when they were in the area but nothing was found at the cliff/beach contact. However, another seep was reported in 1996 by a group from the Academy of Natural Sciences in a small gully about a mile to the east near the old radio tower site. This seep was never confirmed by BLM. Surticially, a drill pad was never established, but a large area of activity is defined by roughly 200 drums, metal tracks, wood debris and various other scraps that litter the site (Figure 35). Presently, the well consists of open casing with a wooden plug shoved into it. There does not appear to be any stressed vegetation that might indicate a hazardous situation. Since the well AJA not encounter o1i and gas Figure 35: Solid waste primarily in the form of empty formations and has no pressure at drums litter the area around Skull Cliff Core Test. The the surface, it is not considered a wellhead is in the upper left portion of the photo. risk to surface resources. The only potential risk is that this site lies near a popular winter route between Barrow and Wainwright and it is possible for a snowmachine to impact the solid waste. Barrow is approximately 30 miles to the northeast and Wainwright is about 60 miles to the west. Ounialik #1 Oumalik #1 was drilled in 1950 and is a dry hole. The well was drilled to a total depth of 11,872 feet and cased to 2,762 feet. It is the deepest well drilled by the early U.S. Navy program. The well location was positioned on the apex of the Oumalik Anticline and drilled with the intent of revealing the oil, gas, and water content of the penetrated stratigraphy. Two cement plugs were set, the shallowest of which is inside the casing at 2,543 feet. Very poor oil and gas shows were reported in the Grandstand Formation, and poor gas shows were noted in both the Topagoruk and Oumalik Formations. Small undetermined volumes of gas were recovered during multiple production tests. It is believed that the gas encountered was large enough to furnish fuel to a camp but not large enough to become a commercial producer. The gas encountered during drilling showed high gas pressure, but the sandstones in which they were observed are thin with low porosity (Robinson and Bergquist, 1956). The gas zones are currently isolated by the cement plugs and pose no risk to sub -surface resources. The wellhead and a fabricated plate are below ground level. Two 2 V2 -inch nipples open to the atmosphere are above ground to allow thermistor cables to be run into the well. The ' well is located within the Northwest planning area (see Map 2) on unleased tract that received no bids during the lease sale of 2004. Near-term development is unlikely. If left 43 0 Ll unplugged, the well has no potential to adversely affect future development, The existing pad contains piping from a ground reffigeration system similar to Topagoruk #1. The ground in this area is somewhat swampy with high susceptibility to permafrost melt. Circulating cooled diesel fuel in the pipes enabled drilling to occur without thawing the ground. The steel pilings were pulled from the ground to be reused at another site (Robinson and Bergquist, 1956). However, steel pipe filled with diesel fuel remains. A 6 - inch circumference of stressed vegetation was noted around several of the low-cut pipes. Despite the diesel, the well does not pose a risk to any existing communities or habitation. It is in a remote location approximately 55 miles southeast of Atqasuk. Overall, the well poses no risk to people or the environment. East Outnalik #1 East Ournalik #1 was drilled on a ridge that overlooks an unnamed tributary of the Ournalik River. Topographic relief is approximately 100 feet. The drill site is highly remote as the nearest village (Atqasuk) is 65 miles away. The well was drilled in 1951 and reached a total depth of 6,035 feet and is cased to 1,100 feet. It is a dry hole. Very poor oil and gas shows were reported in the Grandstand Formation and very poor gas shows were reported in Topagoruk Formation. The well is located within the Northwest planning area (see Map 2) on an unleased tract that received no bids during the lease sale of 2004. It is unlikely that exploration and development will occur in the vicinity of this well in the near ftiture. If left unplugged, the well has no potential to adversely affect future development. The well was left with open casing below ground level and has thermistor cables protruding from inside the casing. The casing is marked by a 7 -foot, Y4 -inch pipe. The open pipe lies within a water -filled cellar. The standing water has produced numerous algae and other aquatic vegetation obscuring the wellbore. Surficial hazards consist of several 10 -foot timbers and a few 4 -foot pipes (probably rig anchors) sticking up out of the ground. The site is mostly overgrown with shrubs and appears to be relatively clean. The airstrip, incoming, and outgoing trail scars are obvious and can be used to navigate to the wellsite. There are no risks associated with the well in its current condition and was given this ranking due to its close proximity to Ournalik #1. Topagoruk #1 Topagoruk #1 was drilled in 1951 to a depth of 7,154 feet and is a dry hole. The intent was to test a small, buried anticline and the various formations associated with it. The well was cased to 6,073 feet, plugged back to 6,175 feet and then drilled to a new total depth of 10,503 feet. Prior to re -drilling to total depth, approximately 250 barrels of crude oil from Cape Simpson were added downhole to help offset lost circulation and caving. Additionally, 20 barrels of diesel were added downhole during the drilling phase. No plugs exist in this well. The well is left with open casing to the surface and thermistor cables protruding fi-om the casing (Figure 36). The well encountered the following stratigraphic units while drilling; Gubik, Grandstand, Topagoruk, and Ournalik Formations, Middle and Upper Jurassic rocks, Shublik Formation (Triassic age), Permian rocks, and Lower -Middle Devonian rocks. Hydrocarbon shows were limited to a few very poor gas shows in the Ournalik Formation. No oil or gas was recovered during 44 0 multiple production tests (Collins and Bergquist, 1958). The well penetrated no fresh water aquifers and does not represent a threat to surface or sub- surface resources. The well is located within the Northwest planning area (see Map 2). It is adjacent to a recently ]eased tract, receiving a high bid of $50.00 per acre during the NW NPR -A lease sale of 2004. Exploration and development in the area is a distinct possibility within the next 20 years but since this well did not penetrate productive oil and gas zones it will not have an adverse impact. There is not a visible pad, but rather an area of disturbance isturbance stretches 1/. mil� - Figure 36: Topagoruk #1 casing on its east -west direction and '/8 of a mile in a north- side. When the casing was pulled out of south direction. Solid wastes exist in the form of the ground, thermistor cables were piping remaining from a refrigeration system that discovered. circulated diesel to keep the permafrost frozen. A potential hazard exists because diesel still occupies the ground circulation lines. These lines stretch approximately 750 feet to the east, 25 0 feet to the north, and 100 feet to the south from the wellhead. Other debris on site include some large, partially -burned timbers, a water -filled wooden box (Figure 37) that resembles a cellar (1/4 mile east of the wellhead), and drilling muds. Atqasuk is the closest village approximately 30 miles to the southwest. The well is remote with the exception of a subsistence camp approximately one mile southwest of the wellhead along the Topagoruk River. 9 Figure 37: Drilling muds and a wooden box that resembles a cellar are located about 1/4 mile east of the wellhead. East Topagoruk #1 Topagoruk's wellhead consists of an open hole cut off at the ground surface with several thermistor cables. A thin piece of weathered metal fits around the cut-off casing to resemble a marker. The weathered metal has been smashed at the base and now lies bent in half on its side. Overall this site poses little hazard to the environment or human population. East Topagoruk #I was drilled on top of a small nidge in the Chipp River delta in 195 1. It reached a total depth of 3,5 8 9 feet and is cased to 1, 100 feet. The purpose of the well was to test an anticline with closure as well as test the fluid content of the perineable Cretaceous sandstone (Collins and Bergquist, 1958). A very poor gas show in the Topagoruk Formation is the only reported hydrocarbons encountered in the well and no oil or gas was recovered during multiple production tests. One cement plug was set in the 45 Ll well at 1,049 feet. 0 The well is located within the Northwest planning area (see Map 2) on a recently leased tract. The tract receiving a high bid of $84.99 per acre during the NW NPR -A lease sale of 2004. Exploration and development in the vicinity of this well is a distinct possibility within the next 20 years but it is unlikely this well will have an adverse impact on development since the well did not penetrate productive zones and future development will likely target deeper formations. A drill pad does not exist. There are a few rig anchors near the wellhead, but no other surficial. debris. The current state of the wellhead is open-ended 10 Y4 -inch casing. Casing height is three feet above the ground surface. It is housed in a small 9' x 9' water -filled cellar. The area is remote and poses no health and safety risks to humans or the environment. Knifeblade Wells There were three shallow test wells drilled in the Knifeblade Ridge area. Knifeblade #1 was drilled on the ridge at the head of a small stream, with wells 2 and 2A drilled about a mile downstream. The wells are in a highly remote location with Umiat being the nearest settlement, 65 miles to the east. Knifeblade #1 Knifeblade #1 is a dry hole drilled in 1951. The well was drilled to a depth of 1,805 feet and cased to 1,211 feet. The purpose of the well was to test the oil and gas properties of the Grandstand and Tuktu Formations (Robinson and Bergquist, 1959). The well encountered very poor gas shows in the Killik Tongue of the Chandler Formation and very poor oil and gas shows in the Grandstand Formation. The well is located on an unleased tract, in Southern NPR -A (see Map 2) where a lease sale is scheduled for 2008. It is unlikely that exploration and development will occur in the vicinity of this well in the near future. If left unplugged, the well has no potential to adversely affect future development. Surficially, there are no concerns associated with this well. A drill pad does not exist and the wellhead consists of open-ended casing (Figure 38). The wellhead is 8 '/8 - inch pinup inside I I by 12 V4 -inch Fig.,e 38: Knifeblade #1 is located in a marshy area at collar. The plumb -bob hit solid at 12 the headwaters of a small creek. feet. Total height for the well is about three feet. If this well is left in its current condition, it poses no risk to adversely impacting the surface or sub -surface resources. M" Knifeblade #2 Knifeblade #2 is another dry hole drilled in 195 1. It was the first of the three Knifeblade wells drilled and reached a total depth of 373 feet, cased to 45 feet, before being junked and abandoned. The purpose of the well was to test the oil and gas properties of the Grandstand and Tuktu Formations (Robinson and Bergquist, 1959). The well did not encounter any hydrocarbon shows. The well is located on an unleased tract, in Southern NPR -A (see Map 2) where a lease sale is scheduled for 2008. It is unlikely that exploration and development will occur in the vicinity of this well in the near future. If left unplugged, the well has no potential to adversely affect future development, Surficial issues are negligible. A drill pad does not exist and the wellhead consists of open-ended casing. There are approximately eight empty drums near Knifeblade #2 and #2A. The wells are highly remote and should not be considered a threat to the environment or human activity. Knifeblade #2A Knifeblade #2A, also drilled in 1951, reached a total depth of 1,805 feet and was cased to 38 feet. The well lies 28 feet to the north of Knifeblade #2A. The purpose of the well was to test the oil and gas properties of the Grandstand and Tuktu Formations (Robinson and Bergquist, 1959). Only very poor oil and gas shows were reported in the Grandstand Formation. The well was left with casing open to the atmosphere and poses no threat to surface or sub -surface resources in its current condition. The well is located on an unleased tract, in Southern NPR -A (see Map 2) where a lease sale is scheduled for 2008. It is unlikely that exploration and development will occur in the vicinity of this well in the near future. If left unplugged, the well has no potential to adversely affect future development. Simpson #1 Simpson #1 test well was drilled with a rotary rig in 1948 by the U.S. Navy. The well was drilled to a total depth of 7,002 feet and cased to 5,954 feet. The purpose of the well was to test the various formations of the Lower Cretaceous and Upper Jurassic rocks. The well encountered several very poor oil and gas shows and one productive gas sand in the Lower Jurassic at a depth of 6,183 - 6,193 feet. The well produced gas at rates up to 3.0 MMCFPD during open hole flow tests of this Lower Jurassic sand. The gas zones are currently isolated from other formations and the surface by two cement plugs set above the productive sand. The top of the shallowest plug is at 5,520 feet (Robinson and Yuster, 1959). The well is located within the Northwest planning area (see Map 2) adjacent to recently leased tract that received a high bid of $7.51 per acre during the lease sale of 2004. Exploration and development in the vicinity of this well is a distinct possibility within the next 20 years and this exploration has the potential to target the Lower Jurassic. Since the well is partially plugged, however, it poses little risk to surface or sub -surface resources and will not likely adversely affect any future development. 47 9 0 The pad is highly visible and was constructed in the same fashion as Fish Creek #1 in which concrete was used as a working pad. Concrete was poured over a landing mat which was placed on pilings. As a result of ground movement from perniafrost freeze/thaw cycles, the concrete has buckled in numerous places creating a partially - collapsed surface. This feature provides excellent shelter to small animals and rodents. Additionally, there is a small pile of drilling muds near the wellhead. The well was left equipped with a casing flange, spool w/ side bull plug, and another flange and nipple and is shut-in with no pressure at surface. The components past the flange have since been removed. Overall, the current condition of the site is non -threatening to the sparse human population and the surrounding environment. North Simpson #1 North Simpson #1 was drilled in 1950 to a depth of 3,774 feet and cased to 109 feet. No hydrocarbon shows were reported during the drilling of this well as no sandstone was encountered (Robinson and Yuster, 1959). Upon completion, no plugs were set and the hole was filled back with muds. The well is located within the Northwest planning area (see Map 2) adjacent to a recently leased tract that received a high bid of $12.76 per acre during the NW NPR -A lease sale of 2004. Exploration and development in the vicinity of this well is a distinct possibility within the next 20 years but it is unlikely this well will have an adverse impact on development since the well did not penetrate productive zones and future development will likely target deeper formations. Surficially, the area is wet with the wellhead partially submerged intermittently throughout the suminer (Figure 39). The drill site lies only a few miles from the Arctic Ocean. The work area is visible with metal pilings around the wellhead. It is unknown if additional solid wastes exist under water. The well was left with a bull Dluiz installed on summer. top of a swedge. The well is not near human activity, and does not pose a threat to surface or sub -surface resources. South Simpson #1 South Simpson #1 was drilled in 1977. The purpose of the hole was to test the Sadlerochit Formation where it laps onto the south flank of the Barrow Arch. The well was drilled to 8,795 feet and cased to 7,206 feet. Reports show that poor gas shows were identified in the Nanushuk Group, Kingak Shale and Shublik Formation. Gas flowed at a rate of 75 MCFPD between 6,522 - 6,568 feet within the Kingak Shale (Gyrc, 1988). The gas contained more than 70% nitrogen. The origin of the high nitrogen content is unknown, but appears to be a localized phenomenon (Bun-uss, 2003). Sandstone tongues 48 0 9 (Simpson sand) within the Kingak Shale in the Simpson and Barrow localities are known to display good gas reservoir quality (Houseknecht 2001). Poor oil shows were discovered in the Nanushuk Group and Shublik and Torok Formations. Drill stem tests did not recover any oil. The well is located within the Northwest planning area (see Map 2) on a recently leased tract that received a high bid of $5.01 per acre during the lease sale of 2004. Exploration and development is a distinct possibility in the near future since the well is properly plugged it will have no adverse impacts on development. Surficially, the pad and pits are in good shape. The cellar has been backfilled Figure 40: South Simpson #1 had its cellar backfilled with silt, with silt which resulted in consequently burying the casing head. the burial of the casing head (Figure 40). Above the surface, the wellhead consists of a 4 -inch line pipe and a master valve. The master valve is frozen in the open position. The needle valve previously located above the master valve no longer exists. Beneath the casing head the well is plugged to surface and has no potential to adversely effect surface or sub -surface resources. The wellhead stands about eight feet high. A plumb -bob was dropped and hit solid at 8 feet and stuck. It was subsequently lost. An old, stripped snowmachine sitting next to the wellhead is the only sizable object that would be considered solid waste. Overall, there is no risk associated with this well. Inigok #1 Inigok #1 was drilled in 1979 to a depth of 20,102 feet and eased to 17,432 feet. The well objective was to test a structural/stratigraphic trap within the Sadlerochit and Lisburne Groups (Husky Oil NPR Operations for U.S. Geological Survey-Inigok, 1983). Some very poor gas shows were recorded in the Sag River, Nanushuk, and Endicott Group. Poor oil shows were reported for the Kingak Shale and Lisburne Group. The best shows were found in the base of the Torok Formation at 8,852 feet. No oil or gas was recovered during multiple production tests. The wellhead consists of three spools, each with a gate valve, a master valve, and a needle valve. Ten cement plugs were set in the well and it is plugged to surface. The well is located within the Northeast planning area (see Map 2) on a recently leased tract that received a high bid of $20.34 per acre during the lease sale of 2002. Total E&P Incorporated drilled an exploratory well 15 miles north of Inigok #1 and used the gravel &J, pad and airstrip near the well for staging areas and a camp. It would be fairly simple to remove the wellhead but the well has no potential to adversely affect surface or sub -surface resources. Additionally, the well poses no threat to adversely affect future development. Inigok #1 is one of the few logistical centers Figure 41: Aerial view of Inigok #1. The drill pad and reserve pit within NPR -A (Figure are visible in the top of photograph. A road leads from the apron of 41). The airstrip and pad the airstrip to the drilling pad. are maintained with no solid wastes present. The wellhead poses no risk, and with the plugs already in place, could be removed. Additionally, this well has a year-round airstrip and serves as a logistical base to various NPR -A activities. 9 is USGS Monitored Wells The USGS has used wells drilled in the NPR -A for collecting temperature data to better understand both the global temperature pattern and its effects on the permafrost. The wells that are currently used are properly plugged above the hydrocarbon bearing zones and into the well casing. The wells are filled with diesel fuel down to the shallowest plug at depths ranging from 1,500 - 3,000 feet. For a list of wells see Appendix B. The program began in 1958 and will continue for the foreseeable future. After this project ends, the wells will have the diesel extracted and the well will be properly plugged to surface. Diesel is a non -corrosive agent, and even if the casing should corrode there would be no impact to the surface resources and minimal impact on the sub -surface resources as there are no known fresh water aquifers in NPR -A. The following wells are monitor wells with surficial issues. It is difficult to establish a rank since the wells are sufficiently plugged. The cleanup priority is difficult to determine as the primary threat lies with wells having downhole issues. However, political concerns could influence the timing in which the surface issues are dealt. East Teshekpuk #1 East Teshekpuk #1 was spudded in March 1976. The well was drilled to a depth of 10,664 feet. It is an active USGS monitor well that was properly plugged. The top of the shallowest plug is located at 2,400 feet. From that point to the surface, the hole is filled with diesel fuel. With the well properly plugged and diesel fuel being a non -corrosive agent, there is no downhole issue with the well at this time but there are solid wastes buried on site that may warrant removal. 50 0 0 East Teshekpuk #1 was drilled on a small peninsula on the southeast side of Teshekpuk Lake. The southern shore of the peninsula is protected from the prevailing northerly winds, however the north shore doesn't have the luxury of a barrier and is subject to erosion. Unfortunately, solid wastes from the camp and drilling operation were buried on the northern portion of the pad, possibly in the old reserve pit. The northern shore has been battered by numerous storms which have eroded the shoreline and exposed the solid wastes, The wastes are unsightly and potentially hazardous. While the nearest village of Nuiqsut is 52 miles to the southeast, Teshekpuk Lake is rich in subsistence resources and numerous summer cabins dot the lake's shoreline. It is possible that at the time of surficial restoration, the downhole could be pumped free of diesel and plugged to the surface. Awuna #1 Awuna #1 was spudded February 1980 and completed April 1981. It is the only well drilled in the southwest portion of NPR -A and is 90 miles south-southwest of Atqasuk. Awuna is the most remote well in the entire petroleum reserve. The well was drilled to a total depth of 11,200 feet. Drilling was conducted over two consecutive winters. Ice roads and an ice airstrip were constructed for logistical support. The project cost approximately $6 million (Husky Oil NPR Operations-Awuna, pg 5). Due to the orientation of the pad, the prevailing winds force wave action into the drilling pad, undermining the sands and silts which make up the pad. Below the sands and silts, Styrofoam was used to insulate the underlying permafrost. Wave action has eroded tens of feet into the drilling pad, exposing the Styrofoam, which consequently breaks loose and blows away. Wooden pilings exposed from erosion show how much attrition has taken place. Styrofoam can be seen all around the pad with pieces blown up to 5 miles away. Figure 42: Awuna wellhead with exposed wooden pilings and Styrofoam. Downhole, the well is in good shape with sufficient plugs. Diesel fuel fills the top 4,000 feet. The well is an USGS monitor well. Wellhead components are in working condition with no problems. The immediate concern with this site is the blowing Styrofoam, but as the years progress erosion could become a major issue (Figure 42). The loose Styrofoam should be cleaned up and erosion progress should be monitored on an annual basis. It is also worth mentioning that the same type of scenario is unfolding at Tunalik #1 (another USGS well). Wave action from the reserve pit is beginning to 51 9 0 underinine Styrofoam from the drilling pad. Tunalik #1 differs from Awuna #1 in that prevailing wind direction does not force erosion in the direction of the wellhead. Uncased Core Tests There are thirty-nine uncased core test holes. These holes were typically left filled with drilling mud and abandoned without being plugged. Drilling depths ranged between 500 and 1,500 feet depending on the purpose of the test. By nature, core tests were drilled to test soils, permafrost, or lithologic units. They were not drilled for oil or gas exploration purposes and did not encounter hydrocarbons. Many of the cores are stored in the Alaska Geologic Materials Center (Figure 43). The BLM has examined the cores and they are extremely friable. It is likely that these uncased core holes have naturally collapsed and harmlessly blended into the environment. There is no surface indication of their location and BLM has been unsuccessful in locating them during several visits to their reported location. The tin not nce an -Y test, are stored in the Alaska Geolouic Materials Center. ft potential risks. Barrow Gas Wells The Barrow Gas Field Act of 1984 (P.L. 98-366, 98 Stat. 468, July 17, 1984) allowed the U.S. Navy to transfer several wells to the North Slope Borough. The Navy drilled six shallow wells between 1953 and 1974 to test the natural gas potential. Between 1974 and 1982, 10 additional wells were drilled to help supplement the local gas supply. The wells were developed for use by the local government agencies and Barrow residents. The act conveyed the sub -surface estate, held by the federal government and any other interest therein, to the Arctic Slope Regional Corporation (ASRC). The BLM acknowledges the surface and sub -surface lands as conveyed and the Office of the Regional Solicitor has confirmed that the Transfer Act included the wells and well locations, and any liabilities associated with these wells are the responsibility of ASRC. 52 0 Square Lake #1 Plugged Wells Square Lake #1 is a Navy well that was drilled to a depth of 3,984 feet. Its primary intent was to test the Cretaceous rocks in east -west trending anticline structure (305H pg 424). No significant shows of oil were found. Gas shows were encountered in various sandstone beds between 1,600 and 1,900 feet, but otherwise the hole was dry. Upon completion, four plugs were reported to be set with the upper plug at 728 feet, well above the gas shows. Two other plugs were reported to be set in the gas zone, spanning depths of 1,640 - 1,840 and 1865 - 1934 feet. In addition to the six plugs, water and mud fill the remaining distance to the surface (Collins and Berquist, 1959). Upon successive visits to the site, BLM field crews dropped a plumb -bob down the hole and hit a solid obstruction between 8 and 10 feet. Don Meares, Northern Field Office, visited the site in August 2003 with an underwater camera and determined the solid surface to be cement. The Square Lake area is clean of debris with a few deadmen pilings (anchors) near the wellhead that could pose a ground hazard. The wellhead is open casing cut off at ground level. Umiat #2 and #5 The Umiat #2 and #5 wells were plugged and abandoned in 2002 by the COE (Figure 44). The wells were drilled on a common four -acre pad in 1947 and 195 1. The purpose of the wells was to test for producing lithologies and determine petroleum quantities. Umiat #2 penetrated the Gubik Formation, Nanushuk Group (Chandler and Grandstand Formations), Topagoruk Formation and Oumalik Formation. Problems with the drilling muds were encountered while drilling Umiat #2. Analysts determined that the fresh water drilling fluid caused formation damage and the Umiat #5 well was drilled adjacent to the #2 with a cable -tool rig. The well produced 400 barrels per day with the most productive sandstones in the lower Chandler and upper Grandstand. Below a depth of 1075 feet, 107 barrels of crude oil from both Umiat and Simpson were used as a drilling fluid, as well as I I barrels of diesel fuel (Robinson and Bergquist, 1956). In 2000, the Colville River threatened to erode both wellsites away. The COE took action under the FUDS program in the winter of 2001-2002 to plug, abandon and remove any surface features. The concrete lined cellar of Umiat #2 and wooden platform from Umiat #5 were removed. Costs were approximately $25 million dollars due in part, to soil remediation. Approximately 30,000 tons of petroleum -contaminated soil was excavated. The soil was 53 0 0 transported on an ice road to the Umiat camp where it was thermally treated in a rotary kiln to remove petroleum residues. Small quantities of PCB contaminants were unexpectedly encountered after the excavation was completed. The source of the PCBs has been linked back to the #5 well and the fluids used downhole. The ever -shifting Colville River continues to erode the north bank and is approximately 50 feet from the old wellbores. With the removal of hazardous soils, this site should not be considered a threat to humans or the environment. Umiat #3 Umiat #3, also known as Umiat Core Test #1, was spudded in December 1946 and drilled to test some of the oil bearing zones encountered while drilling Umiat #1. The well was drilled on the northeast comer of Un-iiat Lake just below the hill from Umiat #4 (Figure 45). Umiat #3 penetrated the Gubik Formation and the Nanushuk Group. The Grandstand Formation within the Nanushuk Group is considered to be the primary source of oil between the depths of 258 and 514 feet. The hole produced 50 barrels per day prior to shutdown. The well was re- tested nine months later with production dropping to 24 barrels per day (Robinson and Bergquist, 1956). The wellhead consists of homemade components with a single water service type valve and is capped with a needle valve. There is no seeping present at this Figure 45: The view from Umiat #4 looking southwest site, nowever seeps are common in toward Umiat Lake and Umiat. Umiat #3 is located on the area, including an active seep in the near shore of Umiat Lake. Umiat Lake. An extensive piping system is still visible. The pipes probably supplied water during the drilling phase. They connect Umiat #3 to #4 which then follow the hill from Umiat #4 to a side channel of the Colville River. Their function was to either carry water to the drilling sites or assist during the well's production phase. The overall surficial conditions including the wellhead and piping, do not pose a threat to human health nor the environment. BLM plugged the well in May 2004. Umiat #4 After encountering relatively poor oil shows on the first three wells, operations were suspended until 1950. Cable tool drilling rigs were introduced to determine if the fresh water muds had hindered the oil production in the previous wells (Robinson and Bergquist, 1956). Cable tool wells did not require the excavation of a cellar; therefore Umiat wells #447 did not have cellars. Umiat #4 is located on top of the hill to the northeast of Uniiat #3 (Figures 45, 46). The well was drilled May 1950 to a maximum depth of 840 feet. The hole bored through the Ninuluk, Chandler and Grandstand Formations. Oil was found in the upper and lower 54 0 sandstone of the Grandstand Fortnation. Drilling encountered good oil shows around 300 feet with a total 500 barrels produced (Robinson and Bergquist, 1956). The wellhead consists of I I '/4 -inch casing protruding 36 inches above the ground surface. The casing is capped with a steel plate. Upon removal of the cover, the hole was open to the environment. No valves or gauges are present. The well was plugged by the BLM on May 9, 2004. The well poses no risk to humans or the environment. Umiat #8 0 Figure 46: Umiat #4 prior to plugging. The wellhead is located in the center of the photograph. Like the other wells drilled in the 1950s, Umiat #8 was drilled using cable tools. The well was spudded May 1951 and completed August 1951. It is located on top of a ridge that separates Umiat from the Bear Paw Creek valley. Drilling intention was to determine the quality and quantity of hydrocarbons in the Grandstand formation near the crest of the anticline structure. The hole encountered the Seabee, Ninuluk, Chandler, and Grandstand Formations. The Grandstand Formation produced approximately 60-100 barrels per day of oil and more than 6 million cubic feet per day of gas. The well was shut in with a gas pressure of 275 pounds per square inch. The gas was analyzed by the Bureau of Mines and determined to be 97.3 per cent methane. Brine was mixed (35 lbs of salt per barrel of water) and used in the drilling fluid to prevent freeze up. Brine solution of approximately the same ratio of salt per barrel of water was used to kill the well and set the plug while cementing casing. A total of 21,695 pounds of salt were used in the well (Robinson and Bergquist, 1956). The well was plugged May 2, 2004. Prior to plugging, the well was nicknamed the "Wliistling Well" due to the gas of which was escaping through fittings and valves in the wellhead. The wellhead is easily the most complex of the I I Umiat test wells. It consists of five valves and multiple gauges. It has several homemade components and reaches a total height of ten feet. After reporting the seeping gas in 1996, two new valves and gauges were installed in 1997. The new gauges have been checked regularly since 1998 and have consistently read 250 psi. Despite replacing the two valves and gauges, gas continued to leak from the wellhead. The largest of the leaks occurred just above the top flange where a 4 -inch nipple and collar are welded together. Other leaking occurred at the fittings of some of the gauges. The wellhead is sited on a gravel pad. A series of piping extends from the wellhead to a small stock tank about 100 feet to the south. The tank probably was used as a holding tank for the oil while testing the production potential of the hole. The same style of stock tank is present in various old photographs found in the Umiat area and may be the same 55 0 0 tank. Oil from inside the tank was sampled in 2004 with test results positively identifying PCB contamination which is slightly below the level of concern. Umiat #10 Umiat #10 was spudded September 1951 and completed January 1952. This well was drilled to test the Umiat anticline and is located about a half mile northwest of Umiat #8. Total depth of the well is about 1,573 feet. When the well was bailed, it produced 222 barrels of oil in a 24-hour time span. The most productive layers occurred at 980 feet and 1,095 feet, penetrating both the Ninuluk and Grandstand Formation (Robinson and Bergquist, 1956). Also encountered were the Seabee and Chandler Formations. The hole was somewhat problematic as it caved considerably during drilling. Operations consisted of a drill rig set on a foundation of 12" x 12" timbers with a thin layer of gravel in between. Twenty-five pounds of salt mixed with Aquagel and water (per barrel) were used downhole to help lubricate the ... ...... . a marker (from the surface). drill bit above the 650 -foot More Aquagel-briine mud was used down to about 1,000 feet to keep the hole from caving. The wellhead contains two valves; a master and a gate, both are closed. The total height of Umiat #10 is approximately 10 feet. The 8 '/8 -inch casing is flared and open at the top. This well was plugged May 6, 2004 (Figure 47). Figure 47: Plugging op erations at Umiat #10. May 2004. el The surface near Umiat #10 is in good shape. There is no existing pad and no solid wastes. With the recent plugging of the well, it is not a risk to human health and safety or the environment. 56 0 APPENDIX B 0 20 Wells Currently Monitored by the United States Geological Survey: NAME Atigaru Awuna* Drew Point East Simpson 41 East Teshekpuk West Fish Creek #1 Ikpikpuk Kugura Koluktak* Kuyanak Lisburne North Inigok North Kalikpik Peard Bay Seabee* South Meade South Harrison Bay Tunalik* Tulageak West Dease HOLE DEPTH(meters) 648 884 640 600 727 735 615 582 227 856 532 625 660 591 393 549 399 556 756 823 *Are also part of the CALM network (Circumpolar Active -Layer Monitoring), 57 • • in remote areas of the leased acreage. These staging areas have the potential to aid BLM's future remediation work associated with the legacy wells. Map 3 shows the relationship of usable airstrips to legacy wells. BI,M efforts 1976-1982 The USGS initiated cleanup of the early Navy wells in 1976 and contracted Husky Oil NPR Operations, Inc. to manage the project. The NPR-A was divided into four quadrants; Arctic Coastal Plain, Northwest, Southwest and Southeast. The cleanup effort focused on the solid and hazardous materials that were abandoned in place by the Navy and was carried out during two phases. After the spring thaw, crews would travel by helicopter to new sites to break down and transport the wastes to an accumulation site. If a suitable site was located, non-combustible solid wastes were buried. While the ground was still frozen in the spring, aCat-Train crew retrieved wastes from storage sites established the previous summer. When hazardous materials (explosives and full drums of barite) were found they were transported to the storage site and hauled out the next spring. There is no evidence of anything hazardous remaining on site. In 1978, an extensive cleanup occurred at East Oumalik, East Topagoruk, Knifeblade, Ikpikpuk (explosives), Skull Cliff, Square Lake, Titaluk, Topagoruk,. and Wolf Creek. A total of $1.87 million dollarswas spent and 7.2 million pounds of solid wastes were handled, stockpiled oc• burned. During 1979, cleanup occurred at Fish . Creek, Grandstand, Gubik, Oumalik, and ----- -_. several other areas in which a well - -_ was planned but not drilled. Approximately $1.85 million dollars were spent and 24.1 million pounds were handled, stockpiled or burned. Field work for 1980 consisted of cleaning up what had been stockpiled and over-wintered from 1979. There is no recorded summary of cost or amount of wastes handled past 1979. In 1981, Husky discharged itself as contract operator and put out an invitation for bids. While waiting for bids, Husky continued its scheduled spring cleanup work at East Oumalik (Figure 5), Wolf Creek, Fish Creek,. Kogru River, Meade,_Oumalik, Square - ---- Lake, and Titaluk. The USGS did not fund additional work at Skull_ Cliff. The contract received no bids and Husky did not return. The USGS drilling program ceased in 1982. - " 1 <J 7 ~ ~ ~! is void of surficial debris. The cellar is visible in the mid- right portion of the photo. STRICTED FOR C-5FFICIA.&SE ONLY jT_ ;S, y `i,av COPY NO_AP -)�,goruk T."SO- `4,811 i.,io� I was beg"u-i-I cr 15, and as a dry �j4,t_', tC4a'll dzr�th c", 10,5035�, an S'e-'embey 5%, :��z cZ. a .,�,4ex"'Ur. yro t IT, at �Pjo 3T ZO" N, Losig. i Ow anal dip -A, -I. dv,� 11 0 f �2,8110 al -16 ap to 0" from 550,01 to in te 'ITe wel L was dr-i'lled test roc-.,�_s ef eand oldc�,- aep-.? And. invest - v wndi, �Dozs`bls .orodvictive f f""r S -,- 10 jlaf -D� c T C. r m a t o r "'s D- f C rc t.,we 0 u S ag"e, fr C,� I P -o c . i J c a C', I c 0 1 -A s, r E ,I -::,�t "11375, -In I Z, t n d a 1101 10 3 4. a te 6 0 -X u �3btx.,�ms, me"EA-1-0-e 1vas ii,he ej r t a 'aP` rO ina- te17 16EO 0 097c�,ati��zi beD-xg abaj:,�-- C'Sts of t wo 51 i P_,!A ind ca-, loa. S 0 f C- Ila -o e,� f z i -ced u:, L Ingod. Gri st._d�r of cores �_Jid cuttiagg, P6-_,.ric log, we -1) ex, gJ cal �4 Ouzd e"Lovation, is 26',� wad tne 3u..-_,Jnc u�,S l"I" r-,.,vTf �Aely 40, Of C�I�i 1-181' r,�-Urdied j, av ---o --Lbl�y C. x`::r- t1tc _7T A surfacs �Iz t be, These ic 'he, C -,-_b -,k comsis`- or C -C _1 ror, S1,10 ae n &2_ 4 Vi -v, - ,hich m-ke Uo Ea b wa 0 thc, abczre 3.50C, ax- T,,0,3t t of tt�sw ars, c, OEX aouS Thc is P. m c, ly ee-, .1, �r: m --d, asua^_ z 0, te S ., !� -, r av cop r�,3 cc�,�, vu,; qu_�,�,rtz, %7� fy- A -,,- dart: �;vck :77, x, en t s,� Thf, 0 w c i t h e i : r S- - a f i -ue ce often N, ep-, Cecus __0 B w v a�,v i'e are raxe, 1010 0 rj wud.,-� ae be� ecrea, -I. - the ba��e o.` -an C, gZ-a�n sizo,, and caly ra fsttf th:';I �)Xe SPI-F,,�� e S, rrei,,sat in ha lc,,�, w! .W.ae, I h be-�dz �,nd Of 30) an d 4, 0 and bu, 811--o" i Caw. is I S absey� bell C, to 00 cl i X- n n o d v- I e, s e_ c, E - I t a r 5,, i o i:,; the 55,3, v'rac", 100,_�` Z (I z e lii �,h "'rom Z,< tc 010,:^ C,�Q( thi S se plt�� ox iz�d tI U11"O 1. "E, o f " .-.C,� --are Y e. sillvy� n��oms_ nf�, 7r, ihe t c n1y in med'am L�_6: gnay -11cy �i L �v es, 0, P. 7 ra s 5r, N�,g zi nds;a thus dates this interval as Zone B -C, the rnier(1osoils ars. nondiagnastic, Zone A. Torok formation. Lower Cretaceous (4610-6600t'). is similar to Zone B-0 above, but Writic specimens of the radiclariaA Litbocampe, some of which were found ia the well cuttings at 46101 do not occur .',a beds you.nger than Torok, A Torok wicrofauna Is present ia this interval, as myell. Although the sectiorn Is dominantly of finely micaceous medium dark gray clay shale), it also has silty layers, and a few beds of medi= gray very fine grained sandstonit with very angular grains, composed of clear and white quartz, which often have a brownish tint under the microscope. and are seldom frosted. Ok-oikruak formation ?,, "pebble shale", Lovier Cretaceous (6600--69101). The sb--,rpest '3-itbolo-ic break in the Cretaceous section of Topagoruk Test Well No. 1 occurs between Core 55. at 6500-6510', and Core 56, at 8743-67531. The shale in the upoer core is ty-nical of the Torok section of which it is part; Core 56, however, is com-cosed of 'oebble shale"� which is a black, hard, glauconitic, often very pyritic clW shale. It has single grains and small. pockets of qaartz grains scattered throughout whiab are very distinctive. The grains range from granule to fine sand sl�lze, ajad are en�irely very clear quartz, very well rounded, with polished or Vitted surfaces. Gray- and black well rounded P'hert grains are also present, -�4-houch rare. IMAicrofossils I und in this interval are presen-11, in both Torok and Okpil-ruak beds 10 elsewbere; these strata are considered Okpikzuak in age because of ths-r li-Itholoa, wbich is distinctive and identical with that of the sediments in the basal 10001 of h the �,�-=Uik Test Well No. 1 (10,680-11,8721), whichwam— dated b t e presence of -;!�eleaypod Aucella crassicolis. Upper Jurassic, protably Oxfordian or Lower Rimmeridgian (6910-78201)� 'This z�6ction is identical, lithologically, with the. interval fiescribed abcvo, but it has -iific microfavna which is lika that fonne. in outcrops of the Siks"kpulk area that so contain &Lcellalronni, a pele4ypod identiffed by R,, Wt. Imlay as 'xfordiaa or av!.e-idgian in age. The base of this interva-1. ir. oarks"i by a densis, heavy (spec-ific �-ax i 1',y Z.35) glauconite sandstonee. COD-sist-f1w; 0"" o0lites I ri a -�( riatrix 0 -If hlem�&"U'J�tq (?) and blach shale. A "i ddle or Lower Jurassic (7820-86-400 1 ton-oists of 3001 of modium gray aon-- .- e calc.a--�-ooue siltztone with abundant iatarcall,��A:ic-ns of dark- gray clay, aad approximately '700'� of dark gr-, cla;,r shale, micaceous, L,-',.th ctrealzs and lines of Ammonites som Z031.047-81142 were identified '07 as '---4edl1e Juras,,sic, but this section is Tory in litholok7, sequence ead thickcn-,se tc; the section desit-,-nated (also by the ideLtiffboation of a=onites) P -S Lower Da South Barrow Tr*,st No, .3. 110 were found in ic�orez from %W1.9 intorval, but ditch sampless from lower `a-D'hs contaiaed a mixed foram it.1 'er-al fa=a cl' Triassic. Up -�c, and Possible U - . per Jurass., cwGr J-m--assie- the latte-r are like those -.1..n t.1 -m 1 -sower Jurassic sectioi, vf South ��arrow Test 'We -l! No. 3 anii Sim-osoa Test 'Well Exi� 1. ;7, 'r' -IE "c (BW -932W). Ostracads, sol4inc-I'd E�pines s d ritic ps'. cypods- Pra,�,Aat .1 1, �' "': Al T�Y 2 cizi-tings from 8640' downward through. the izterv-'.. -onteia`Mg t ie Triassic -��alqbia. and �:ti'Dat the top cf the 'T'Tiassic st�dimelats i's c, -o C6.40', The 1 i th-olo&y of this interv&l 5�f.-,, 000r -r represe t 1) the I na 941 V we 1 sy -:E�re bad contaminated, -W- ea-vings� P'lwo corev� at fli�-'17-89211 and a, vXl ly dstrt t -2 1 r com-oosed o:f 1� grAy, cl-,Ay FhZA-s a amiourvll� stone axe a!,moat en-v�iz�e.' C roe ly of the zanl� t' , Of -1: wi th somr; v i.7 fine -2 - I - is 2 S rip a ctons a a Apo 00 a' 1A one 'M I a Vpry Ynn2 "YO�n v, Q "Ll �Mstoms at 1820, E1,71. aah wra UN gr�v DeMISOUS 1.1010no VTV_� 241 bias of the Menica, A SMAI broWnh gZM7 ljxe�vnu�_ 'c VWL7051 at THU. Tie VSKIA Mg has to f=Vr?zOV in the 601f Poteltial uurvc- Ov� o-roaponle roughij to the rkliceouv umdOone. but it We saviral NOW Q ?'� VV:'QjVjW curTc 'esvinially at SSSO-87001, 8350-68801. and MOMS,). =-'� jrMAQ Acrnane below DIDO" in the self petratial aurva, that are act reflected. ��n Y01 castings, NIVAMI 02320-27MI), Two speAmenn of a Aramialfex found to date only in the', of the Slksnkruk-Anusbuk area, wera Wand in TapagoWl-, on. 1 at HaDy'-, Warews nbe Mow cvatact is pas at that poW. The ,V�: Qvz� Athaloghe break is a graW, sillescon sandetone a! 93801. Alch A like A , in, coraC zvctlua AM, Thu ccrej soclica consints of veg ry A00 grw 011cenas wandshov, W WIMune, Ath 121 ei white chart coaglem- t� row R523' to MY; the laAsr is Onedirlely avaplaia ty about 181 of mottled �1� grgy 01gyntcMa WOOn it very SHROX zc ar6n- of the Mocks aangc. Uslis of the Wn&-ranging brawhiagod op. are 5catteTS1 tWougo the rock in Ths of the interval, aad A s 02m 913BI FeWan acelcoanth fish OWS nexe D, ':;f oraa. husewo, A to as i�770-10, 040 WAS 31 hralugfc VMH cantawns ac SVGA aal its age I-. V"'�aQSQ of sea vWwt3t*, clayptoae aud sanistone, with a few AN; Ah. YQ can a little AterlamILQed red and green shale. A smali ; 0 f 4 n N r k� JI a 1 s P b F p r e s en _,% 5 z I � I � e, o s, c �, c; Lt , Sa angplar 4C :n Vap the ovarly!ag Ted bedsl Coro BE, A 10,228-10,22W. nzd the corne baio-w 0 " inn Ono of 55 to IS -A while AOMR A the youngor norata 07 more than 50, The v A2 lorgely a AM Tay tightly packed chert conglomerate, with some dark gra.,% NVA a a and a far SanStanes. A thia coal onGnans W A 19M. Well PreaFrVed, caltanized _ir is, 441"! MY were AWK A ed !I j, Schuy""', ".-hIc staled nt 0 21SOns, Oun of Lcie;cex, �Ss 13400nod at MAY 5q WX71 conglamenstl stone Nem MY to 52840 bled qzs, but a test WiUr at 5159' 7,00vered ac 012 cr go! W Wa AM (under 30 minutes) time be! A, A "tight oil sann with E qrssaue War" Ustroleum jaginsayl-- r4coveres AGn V com Ast ACM lows, to 1350 7enuvvred no oil Cr gas. f sit Ad f rom cc A WA 2 Wd. f rem 10, 191, to 10. 196" ". (Fe troleu-m Aagust 5. 19011, An oil lots in 0014 Wqrs Made 5016 YSIMI, YA low VY yulln'�t it! Av 6 a- tu'--ati on t -as ts 0 f, 2 re -,j7, -�a 'D-1 07 c aith -Pe 2.- 1 V�FL a.�� Volum E 1411 C-143' 31 08 24 -Foro sik L_.:eermeab-ii -.1 tar ar'c". 0 ore De-Oth -i,'f fecv e ab It"' i -ty C-rboaate Content, % 3, 1 5�17 ad� 16.38% 3-0 lTz,)!�rmeahle 2 4 1204F 2E. DO 4 F cy, 14,7 4 li, 4 120S.? 2), �31 9 �,l md. 13�2 4 12NN i'�8 � 8 md, 6 179C-1800(11 from 6 , 1,8 md. 16� 4 6 179C -1800(V from bo t tom) 17,7 rm s. al 1 .1. e 1�2 5972? ru C. 3�. 649EF Zl- ?1 16 5 4 78 & 6 le s 3 thaa I md� 942CiP 6.9 16.2 942CY 6 6 1'. 9427 51 94-a; 945C; 5.26 27�O .§�ectl,.Qc Gravit Ue- Den th necifia G 78o�; 78141 arg-U'acawn gla.ucoaita 3.35 64 782�1 Silt ��1410 2,64 2.67 1; 4�, s,l J. 't �3 P,;) n -s s "'a a, I o 2 � 66, 86 �Jl -;�)ne --.59 2, a s c ..... 3� 01 044 Perm i w a "'sous s4itptone 2.68 pl� 67 0 dL a �ma 23, 12 --ng-laraaratc, ?. &S 6 �)iub 5 7 V`?_ i 6 0 i 910 200 Z00 Sand, very fine to mediura. graJnekdi, with a few coarse grains. composed of very well roandsd t�,) subrci.rlded (rarely subangular) clear, white and yellow'quartz, Ver�- irare -Ioal. (T) particles also present. One Cretaceous forairIni.1"er (_ J::-,ka va.) was found. No saviDles received. Z"u? 'Wel.l Geologist's Beport listr, "C1V shale with coal Interbeds andi ir."erl�eds --,f limestone and. calcareous silts; abundant aagular and s"abroul'IdE,c, chort granu!�-isll. Coal, with some veray 2"..ae rxalned, very silt7t, very cal- careous, greenish �;-ray, ox" clegar and white quartz grains-, occasianal chert fram 12f:' to 2'JOI aontain a larg,., amount of ,-*emen,,',, Uo qamDje� It.'s I I geolo:,'-.J_st report�,3 I'shaaleat hiedUUM. hard, gray. with fine sand inte-beds and ±'ew th-In cc,al soaims" :F -:)r interval 111-3021. Sandstone, fine to verj fiae, Irard, light olive grayo very calcareous, of angula.- to subaagaL�x whitc and ciear quartz and ci�xasional dark grains, Some. gray shale, ra:7-ev :pyri ta and coaal,, Coal with soma s,�,.ndstono as ab,�,ve., ;Sandstone and claW shale ats Zlk,-ve, lwrith some coal. Coal, with small amount sandsi,one as a -Dove, Clay s1aale as re -ported lby- t -he ��;rell &�olo�-,.iste and sand, very fine sub- angullar whit's- at-,artz, T:,',aggmf�nt-:�' hard black sha-le 2,120-2M, . Sand,, as abover, and v6r-� grading to v;�_ry IiW sand- stone. With 0 sh,.z-: a, black� sof 1;, ca:rbonaceous, Sand, as above,-, Den th 3 1 0.121� 31 a I 10, 5 110, Saa�-'_lstone, Ilight gra (salt ind pepper). fine, ualcareous�, ma.ssive, moderately well ind;zr,a0W,:�d, Thin streaks of ,arbonaceous �Ia lower 6' - bocomaF; rather friable, 11�ir Carboaate Content De -o Fc;:rositZ Fes-mpabili'�z bX We�Ah_t I crP .- 5,17 mi, 16.38% 8 medduz light; graj clay shale Ead �'4 light gray. fine, frilable', almost 2 com aon-induratcd, oc:;asionall t1hin streaki'. o rnat6ie.J'_ "R."An streak oZ�-' coall z" ec i �ravi lar 84 10,017-22 7 2'.68 86 10,228 Devonian d_ark gr,,�r cGuallomerate 21 171 88 10, 394 V6 2,64 C 130 10 1 IA3 U 2,68 5 DO, 476 dark tM. .-it ccliglo-Merate 2"63 �)iub 5 7 V`?_ i 6 0 i 910 200 Z00 Sand, very fine to mediura. graJnekdi, with a few coarse grains. composed of very well roandsd t�,) subrci.rlded (rarely subangular) clear, white and yellow'quartz, Ver�- irare -Ioal. (T) particles also present. One Cretaceous forairIni.1"er (_ J::-,ka va.) was found. No saviDles received. Z"u? 'Wel.l Geologist's Beport listr, "C1V shale with coal Interbeds andi ir."erl�eds --,f limestone and. calcareous silts; abundant aagular and s"abroul'IdE,c, chort granu!�-isll. Coal, with some veray 2"..ae rxalned, very silt7t, very cal- careous, greenish �;-ray, ox" clegar and white quartz grains-, occasianal chert fram 12f:' to 2'JOI aontain a larg,., amount of ,-*emen,,',, Uo qamDje� It.'s I I geolo:,'-.J_st report�,3 I'shaaleat hiedUUM. hard, gray. with fine sand inte-beds and ±'ew th-In cc,al soaims" :F -:)r interval 111-3021. Sandstone, fine to verj fiae, Irard, light olive grayo very calcareous, of angula.- to subaagaL�x whitc and ciear quartz and ci�xasional dark grains, Some. gray shale, ra:7-ev :pyri ta and coaal,, Coal with soma s,�,.ndstono as ab,�,ve., ;Sandstone and claW shale ats Zlk,-ve, lwrith some coal. Coal, with small amount sandsi,one as a -Dove, Clay s1aale as re -ported lby- t -he ��;rell &�olo�-,.iste and sand, very fine sub- angullar whit's- at-,artz, T:,',aggmf�nt-:�' hard black sha-le 2,120-2M, . Sand,, as abover, and v6r-� grading to v;�_ry IiW sand- stone. With 0 sh,.z-: a, black� sof 1;, ca:rbonaceous, Sand, as above,-, Den th 3 1 0.121� 31 a I 10, 5 110, Saa�-'_lstone, Ilight gra (salt ind pepper). fine, ualcareous�, ma.ssive, moderately well ind;zr,a0W,:�d, Thin streaks of ,arbonaceous �Ia lower 6' - bocomaF; rather friable, 11�ir Carboaate Content De -o Fc;:rositZ Fes-mpabili'�z bX We�Ah_t I crP .- 5,17 mi, 16.38% 8 medduz light; graj clay shale Ead �'4 light gray. fine, frilable', almost 2 com aon-induratcd, oc:;asionall t1hin streaki'. o rnat6ie.J'_ "R."An streak oZ�-' coall Blow: Sand and sandstone, an above, aid =0. Ath a emaLl amount of AM chale 7 3,D,' 401 Z�aal' VS17 f Ne, 10 to, 312-1601 Coal, with a =211 snouat 30 yslloylsb asadnQue and gresniuh gx, vaqi fine to fine grained asalstone. MWO 60 Wdstane. yellowish, eat gicaUsh gray as abov't'!, some blask shale, 355-TE01 Coal and greenish grgy sandstone, Mh blLck clay ant rare gyrite, ZT-IND, and ra.z.-s-, Co -al, 310-001 Coal. AM some eandstene and blaW Any shalx 410-201 A zaEplo. 4 �� D �- -�, -JQ A tone, clay Mile ant coali with rare aley ironstone azE pyQW 49WED, Clay shale, Weresslug with depshc sandstone, and aame coal which decreases to rare with depth, 430-001 sha�,e apd sandstans as aW�'rzi' �":dtb. a znlall amount of Mitstone", very sandy, caloaxecus, argillaceous Some coal, and black clay skale in bottom 101. 11) - - IK Clay MY and mEadstoas as Move, hit with more siltsione, and saru clay ironstone aid black sbale, �,Scj C'lay ebals, silty. medium gray. haid. Aty mme Acne. Aa7 ironntone; aLd Alt3taus; pywits commea, WT shale, wit! a small anouat of czal and inonston�: pyrite, black MY shale and Mtataae zurs, 55>430, Sandstoua and Wtstonn with some ca -11, an -d a sirA-11 amount -�f ahala aah ironstone, 550-560, Coal, with a little gr4v 530-170, Siltstoas. cool. candotons. grzj andRack clay shale, and kranstons, ---- INEZ intiGn gr�30,?' salt aT;l pejarl. fine L�, occasional efreaks of carbon- accoun material, plant fragnAts in mudston�� MOAB, alunda--�;t 1noc,traquy ANILIM, Oak Wfective Arasijy Air i"zMeabi'i ----5770 1 ---- — I t cc 3P 2?. R 315.2 md- BUN 25. Ll- 2130 A, MWOMUSID MIUL Ot=-, C17- Mc Sandstone, fine to we, fine, groeWh gxayt sligktly calrazeaus, vax� posed of subaugular AM End clear 7--'nou-nt o -J"., Wax ironstoLe, E Q- 110 Sandstone an abovo, mnedi-zii gray al4w shale, anc� a sna,`U anno�:z:,t -nd sil�'Starve' �Lndstane, Way shale. and Waslaue; "i sma mi, blaioh. o"', a gray .)v- -at apper 10 1 � -40-720, Limsetone. very silty and arg!Aacecus. medium daA, gx'-ay ; 'ea of sandstone, TKOW, Sandstcne, as abo7s, with a email amount of limeoinne, Gaj shale inc", ru 760-790; P? 10�6 410, Core Sandstone, gray and black shale and coal-- � Clay shale, gray amd black. wi&;h some sandstone. �andstone, fine to medium graiaod, very slightly argillaceous and silty, "salt and pepper" s?m.de'lone, very slightly calcareous, friable; it is composed of subround to :3ubangallax clear and white quartz with a small amount of gray 3nd bladc, rock fragments. Some gray sbale, and a little clay ironstone are also present. Sandstone at above. with coal. Sandstone as above. with a lit"..'.e iroastone and black clay shal6, Coal and sandstone with occasional limestone frajgme�nts. Coal and sandstone as above. w-.��h some limestone� Goal with a little saudstone, occasjonal fragments of clay, 3ronstone and black shale. Coal and 'salt and pepper" sandtitone Dent Fecoverz D JL t C h 0 r� 7 J-� I-LJj 81 Clay shale, lilght gray,� backly to wab- coachoidal cleavage, Has 'slippez7d feel to the tout.,L. i,�arcasite aodule (11' across) at bottam of cera. A:buadaai-'� Zone 3 Mi-crofauna and small pelecypods, Clay shale. gray and blacllq coa:i ' , and, ixonstone. Clay shale, grayo sand-stoneo a:!--' - tftne, a,.na ironstone. Clay shale. gray, with a little ironstone and coal. Coal, with a small amount. of i:.,onstonet black- and gray clay shale. Coal. and gray cla�f shale�� with ��3ome iroastone azd "'salt and pepper" sandstone. Coalt gra�,,,r cla�r ihale and sand-3tene. Coal witk- small alaount of gray 4,,Iay shale and occakdona�L pieces Ozalt and pap er" sandstone. P Clay sha-le, gray, witIn some cozs:� and sandstone, -1-10 S 1 I , am-) ea. Coal, aamAstone a�ad clar shale, ,'3.--;Vlds tone, very fine grained, -P�tz�y silty and argillaceous, light olive gz,ray, ver,,- calcareout, with sone grny clLaj sha.Le and a little coal. Sandstone as above, with occas-Ional otprea�'.,Cz clay sltale and ironstone, 3andstone as above, with siltstone and clay shUe, Sundstone as abova, wit'11 gr&y c.` -ay shals -and ironstone, Dcer, th �Reco Or J 210 120 9 1 go . Sandstone,) Ilight gray (salt and pepper) f ine to mediur., 3ubangular, rery slightly calcareous, modarat-.(sly fria�ble, trace of mica. rfective Air Carbonate Conteat Po ro s -1 t -,r Fe rmea, b t 'a ig"'I t j- 4al.1 W 1 190 ISR, 26. C-6�1 200A, ;,,--d� 14.7�Z 12(09P 21 1 3- 1209"J 16 IOB 1 8 I Lq- _r -c _h 1210-12901 Undstonet yerr !Jae grajaed, very silty and argillaceous, light ajundlsnt plant fragmeats, rare wilt: Parting% olive gray, calcareous, and sandytoaeo medium to fine glained, "salt Baddiag flat, Mlicrofoisils ab=:dzani"�� and pepper", medium light gr�qr, .3jjg;,h'6Iy calcareous; grading to AM - stone, voq7 sandy and argillaceons, medium gray, slightly calcareaus and slightly micaceou, AXON& SlItetono, Mb sews vagy fiat erailed sandsWne =QQ3154 Saadrtono, siltstone and z1ay slE-Ie� 1340 -AW Clay shale and siltstow with a small 3scunt of saadstrne� MOAMI Altstone, with sendstona aad KEY GAS,, 1375-3380v KIM= and Way shale, with a small ancaat of ve4r One gxaincd Clay shale mad siltstone Ath streake sandstone. eandstone and "salt and pepper" sandstone; pyrite Comm= sanistm, very fine graMedt very Wify, light yallowint gTAY, Zan- GAW shale, zedium dark groy, non�caloarewus, with small amount Hit - calcareons, with many tanv bladt and rallow sizba'ng-alax Ezd eulbrounded stone aad rare strelks swidstone; soma qVxite, 1450-24951 Wawa, lioht AW gray to olivs gray, slightly micaceous; slightly calwarooun Meats eandsione at 1480-1001� Lq- _r -c _h 5 ARO -ADI IV Way sbale, modium gray, backly cleavage, ajundlsnt plant fragmeats, rare wilt: Parting% Baddiag flat, Mlicrofoisils ab=:dzani"�� D -i It cah HONOR, siltitons a2 abovap with 114Y shale; p7rite ramm= 090Q6101 saadatenz and untatonew with sooe clAy shale; pyrite r&xe. AN -M& Cla�r shals Lmd siltstone, with rFxe streaks vandston, 101ann Raj SUN, with small amouat siltstoas" 025-YOV WItstans, oaadstone ana clay sbals,. WO-Mch Clay shale mad siltstone Ath streake sandstone. MCQ7901 sanistm, very fine graMedt very Wify, light yallowint gTAY, Zan- calcareons, with many tanv bladt and rallow sizba'ng-alax Ezd eulbrounded graias, Streaks claV ahaA and KIM= W bottom 151. 6 1� sands"liari-to Ven fine erained, WiUM light gre'j- avgilla;iovs� silty, slightLy wicareous, ncn� calzarorm SaW Eraini are Pubangular, Vxgslk9� slear qanxto with some whito ant KKK grqy graiasn 5P, " , 'Q A- 1, below to i 8 I'l, 8 md, 112* Maystow medium gray, silty, winceons. vey'.i, calonracze'; very fine to fine gralnud, medlam M&'6 calcsxsam!� Micaceaus, with evenly baddat lamlnst� maKed scatters& flakes A oLrbonized planl'� romahas an Partirgs. Dip A 1, 14SVI WOM Q) 17,75 impermeable WCTOAMIn ra= Di to h 1800-1810, Sandstone, light yellowish grq�rj. very fine grained. 1810-18600 Clay shale and -siltstone with stpreaks medium gray sandstone. 1860-i9lo, Sandstone. medium gray,, Clay shale and siltatone. 1910-1935e Clay shale, medium dark gray, non-caleareous, with small amount siltstone and sandstone. Pyrite rare, 1935-12601 Sandstoneo with small amount siltstons and clay shale, 1960=20401 Clay shale, medium gray to medium dark gray, non -calcareous; and siltstone, medium gray, slight2,y calcareous. 2040-20901 Sandstone, very fine grained, silty, medium gray, slightly calcareous, with rare carbonaceous partinga, and a small amoun,6 sandy limestone, in bottom 101, Core iismearz 7 2087-20971 10, on 590" Sandstone, very fine grained, very calcareous, .VG17 8J.-Ity. medium gray. grading to very Cal- careous sandy siltstone at base, 2�0 below the top of the core is a 4" layer of claystonq,, medium dark- gray to light olive gray, slightly to ven, cale.areous, with small slickensides (dip koproximately 450) '; the lower part is broken .,Iatc ang%lar to subround fragments, in. a matrix of zandstoiae. MUnute vertical calcite veinle,:""n occur at the base of the sectjon� I'10" Clay medium dark gray, slightly micaceouso Slight4 Oaxbonaceouse with scattered laminae and lenses of medium gray siltstons, 312" Sandstone as in the lower part of core 6 above, with a I" layer of claqr shele as above at 20891 and a 411 leqer at 20901. �haevidtgitalium fragments and microfoasjUs very rare, Di tch 23.00- Clay shale, as above. with somst saadstone and siltstone, 1200- Clay shale, medium dark grajr, non-calcareous� very slightly.micaceous in part, w.-&th some siltstone, riodium grayq slight4v calcareous in -Dart.. Sandstoas, very fine grained, nodivm light gra,7, with a small amount of siltstone and cla,-,,r shale. wr'.5170_2390 i Clay shale and siltstone, grains of coal-, Rore Dam th Recovelz 2390=2399t go OR Clay slmle� meditLa gray to medium dark gray, nan� calcareous, often wits,- baci .cly cleavage, -with Occasional laminae aad thin lenses of silty ruedium gray shale, Small patches of sandy, car- b0nacevus Silt, and ftagmer-tal carbonized plant remainu throughout. in.oce—inas priams and Zone U microfossile common, W 2400-2560Q Clay shale and siltstone. Siltstone has grains of coal, It decreasez in abundance from almost half of the samples at 24001 to absent at 2950-29701 25301; a small amount, partlyoocurring as laminae in the shale, is shale present from 2,5300 to 25600. Top glauconitic DicjXomitra at 25301. 2560-25651 Sandstone, very fine, with siltstone and clay shale, 2565-2580, Clay shale, as above, 2580--.N.201 Sandstone, medium -fine grained, 'salt and popper", medium gray, friableo shalep. very calcareous, grading to very fine grained, silty in bottom 101. 2620-26401 Clay shale. with small amount siltstone. Core :11-h amneiz 9 2637-26421 30 116" Siltstone, very argillaceouse medium dark gray,, 3050-3220, slightly micaceoueb non-calcareouso grading into shale 116" Clay shale,, medium dark gray, non- calcareous,, 32 4T, - 3 " 3 with occasional slightly silty streaks. shale Zone B microfossils rare. Di tch gray, 2660-26801 Clay shale. with sandstone at 2455-266W and small amount siltstone with ..Ore RMth carbonaceous partings. 2680--274011 Clay shale, with some siltatone at base. 2740-27501 Sandstone,, with clay shale and siltstoue. 2750-2.830' Clay shaleo with streaks siltstone, 2830i-29001 Clay shale as aboveo udth interbedded sandstone and siltstone. 2900-29400 Clay shale, with rare laminae siltstoneo medium light gray, Core Dipt &!a� 10 2940-295of go On Clay sha-lec, medium dark gray, non -calcareous,, vex7 slightly micaceous�, with thin (up to 13-11) beds,� leases and laminae of siltstone, medium light gray, argil-laceous, non-calcareoust. poorly crosebedded, and contalaing occasional fine car-- bonaccous partings. Siltstone makes up approx- imately 15% of the total recovered core. Zone Is' microfossils common, Di tcla 2950-29701 Clay shale with rare laminae 0.1tatone. 2970-30101 Clay shale and siltstone. 3010-3030' Clay shalep. with rare siltstore laminae, S030, -3050' 'lay shale and "salt and repper" sandstone. 3050-3220, Clay shale with scattered�laminae and thin beds siltstone, 32 4T, - 3 " 3 Clay shale with thin beds sandstonep very fine grained, medium light gray, with carbonaceous laminae, and minor amouat siltstone. ..Ore RMth jagRXM 3240- 3249 6� On 190" Claystoneo very siltv, medium grvc, micaceouso slightly calcareous, t4tb flakes of carbonaceous materLel scattered thraughout. 21511 Claystone, very silty, micaceous, non-calea-racuso with abunda:A flakes of carboalzed -alant remalas M Core RUM Ramm. scattered throughout, 0 15" Biltstone, very sandyP medium 'light gray, slightly calcareous, -edth carbonaceous partings and thin beds (up to JR) of medium gray clay shale. 212" Clay shale as in Core 10 above, but with an increasing amount of mica, and flakes of car- bonized plant remains, toward the base of the core. A 1" layer of sandstone, very argillaceous, medium gray, non -calcareous, with abundant flakes of carbonaceous material occurs 30 above the lower end of the core, An ammonite from 32491 h,as beea identified by Ralph W. Imlay as Cleoniceras sp,,* diagnostic of Zones B -C. kicrofossils very rare. Ditch 3250-32601 Clay shale with thin beds sandstone. 3260-3310, Clay shale with scattered lamiaae siltstone. 3310-33251 Sandstone, very fine grained,, argillaceous, silty, light gray,, slightly to very.caleareous, of subangular clear and white quartz, gray cbert ,Ind gray and black rock fragments; scattered carbonaceous partings. 3325-342D, Clay shale with scattered laminae siltstone. 3420-3430; Clay shale, sandstone and siltatoneg,,interbedded. 34-30-35301 Clay shale with thin beds and laminas siltatone. 3530-3540, Clay shale with rare laminae siltstone. Core De-Ot Recoxe 12 3540-35490 00 13 3550-35601 20 6" Clay shale, medium dark grayo non-calcareouse with rare laminae and thin lenses of medium li ght gray argillaceous siltstoae. -Di-p 0-30. Microfossils abundant. -D i t ch 3560-3804cl Clay shale medium dark grV to d -ark grayo slightly micaceous with rare laminae. Core PeRt k1gaver 14 3804-38079 21 On Glay shale, medium gray to medium dark grV, non -calcareous, with laminae and thin (up to 2") beds of siltstonet, msdi,= light gray, sandy, argillac-eauso slightly calcareous (dolomitic?), with occasional partings of medium dark grV cla�r, Di -a 0-23. Siltetone total$ 15% of the resovered core. Hicrofassils very rare, 11 D i t ch 4790-489W CIV shale as in core 17 Core 22pt�b 'Recove;Z 19 4895-4899' 00 off A-899-49021 21 6 1; CI�W rhale, medium dark grav, slightly mi-caceous,,. non-ca-Icarecus. T-�oor sha3.y cleavage� Dip 3-60 M� Laminez and thin beds (up to thick) of medium light gray argillaceous siltstone make uo less than 51�� of the rock. Hicrofossils abss.nt�, one Small 'L yLdentalLi fragment Dias present� 'itch -Z9 —02- - 51: D 0 5 Clay shale as in Core 20. 12 Di tch 3810-3870, 01V shale, medium dark gray to da-rk gray, slightly micaceous with rare laminae siltstone, medium gray to medium light gray, 3870-Z9001 Clay shale with thin beds and laminae siltstone. 3900-4-10W Clay shale as above with laminae siltstone, Core t aft22—Vearx 15 4100-41101 01 a" Claystone, medium dark gray, slightly silty, micacexas, non -calcareous, conchoidal fracture, Alicrofossils absent. DI tch 4110-43451 Clay shale as above, with very rare laminae siltstone. Core 16 4345-4348 31 011 Clay shale, medium dark gray, slightly nsicaceousc noa-calcareous, with occasional laminae of light gray siltstone. Dip OP. 14icrofossils very rare. Ditcy 4348-.4632.1 Clay shale as above with very rare laminae siltstone, Core kep th Igaver 1? 4632-16351 30 on Clay shale,, medium dark graye non-calcareouse with very rare slightly silty medium gray laminae. 0 Poker chip cleavage(, dip 2 kicrofossile very rare, Di tch 4635-47851 Clay sb---ae as in Core 17. Core jtLth AtMvea 48 4785-47900 51 C Clay shalev medium dark gray,, slightly micaceous, non -calcareous, vith poor shaly cleavage. Dip 3-70 (?). TLare laminae of medium gray argillaceous siltstone, and very rare small T).Vrite nodules, Microfossile absent, D i t ch 4790-489W CIV shale as in core 17 Core 22pt�b 'Recove;Z 19 4895-4899' 00 off A-899-49021 21 6 1; CI�W rhale, medium dark grav, slightly mi-caceous,,. non-ca-Icarecus. T-�oor sha3.y cleavage� Dip 3-60 M� Laminez and thin beds (up to thick) of medium light gray argillaceous siltstone make uo less than 51�� of the rock. Hicrofossils abss.nt�, one Small 'L yLdentalLi fragment Dias present� 'itch -Z9 —02- - 51: D 0 5 Clay shale as in Core 20. 12 Core Dept D e -C -0 -Me r -z 21 156025-5010 0 14 211 W5" Sandstone, very fine grained, very silty and argillaceous, medium light gray. slightly cal- careous, with irregular intercalations and streaks of medium dark gray claq shale totaling about of the rock. 0191 Clay shale fragments, medium dark gray, very slightly micaceoas, non -calcareous,. Microfossils absent. 22 5010-50161 01 6" Fragments of dark grav clay shale and medium light gray sandstone, as above. Microfossils absent. Di tch 5010-50919 Clav shale as in Core 24 below. core De -pt R22—ne—rz 23 5091-50940 09 of$ 24 5094-50981 0 1 4" Clay chale, medium dark gravo non-calcareouso slightl�r silty,, micacecus (largely biotite),? with minute flakes carbonaceous material scattered tbrou,F,hout, Microfossils absent. Di tch 5098-51830 Clay shale as in Core 24, with laminas modium gray to medium ligbt gray siltstone and rare laminae very fine gra--',ned silty sandstone. C ore am Mth imz�e 25 5183-51930 go On 0090 014yetone, medium dark gray,, very slightly siltyi,, non-calcareouse with flakes of blotite and Carbon- aceous material scattered throughout, Top 1-11 of section is medium light gray saadstone,, very fine grainede very silty and argillaceouse non -calcareous,, with sbarp sandstone -clay contact dipping 180. 013" Sandstone, very fine grained, very silty and ar--- gillaceous, medium ligh�vl' gray, non -calcareous, slightly micaeeaas. with some bedding planes (occasi=OJ.y crossbadded) and minute tension cracks marked by a concontration of dark carbonaceous material, 0120 Clay shale, medivn dark gray, silty, micaceous with intercalations of medium li&-ht gray silty argil.-La- ceous sandstone at lower and. 3"211 Sandstone, very fine grainedr, vex7 silty and argillaceo-ast. sodium ligbt gray to light gray, slightly calcareous in part, composed of subangular to aagular grains of clear or White qzartzo some dark grains, and occasional flakes of mica. and M Core DI tch 0 RMI -h Zisameurz carbonaceous material. Possible crosebedding plans (marked by slight�g lighter color and coarser texture) dips 25 . ContemDoraneous deformation is marked by distorted partings of medium dark gray clay. Thin intraform- ational con4omerate of medium dark gray clay shale occurs at 5186% 10611 Interbedded and interlaminated clay shale and vez7 fine sandstone as above, with ir-. ragW.-Lr leases of clay, crossbaddinge and small-scale contemporaneous deformation. 312" Sandstone. very fine grained,�. very silty and argillaceous, as above, has sections with abundant laminae and thin beds of clay� dis- torted by contemporaneous deformation, alter- nating and intergrading with sections that - have subparallel carboAaceous partings spaced from 1 mm to I am kParto dipping 28-330, and I ff di a - occasionally offset by small (up to placoment) tkmust faults. Microfossils absent. 5193-5268'3 GI -ay shale,,, medium dark grayr micaceouso non -calcareous, slightly silty In part, with laminae of siltstone and very fine grained vei7 silty sandstone-, very rare -pyrite, Core De -0 th 26 5268-52780 01 on 27 5273-5268' 00 00 Di tch 5288-536oq Clay shaleo medium dark graye 'Ath laminae miltstoAs and sandstone,, very fine grainede silty, argillaceous, madium light gray, calcareous, slight increase'ia siltstone in lower 201. core 2M Mth Atsivneurz 28 5360-5365t 21 611 Claystonev grading to clay shale, medium dark gray to dafr. gra;.r. finely micaceous, witt, occasional laminae and small lenticles 14 t 53710-5375' 0 0,0 P 0 of sJ'AL-Ust-oze, &rg-illaceo-as, zedil= light, gra.y, non -calcareous; theR are Sometines slight2_7 distorted or broken with minute Yetn' faut1t3.. Dip of siltstone lamlsiaz Z_ �%_Qo 30 aip of Shaly cleavage Nlic.-Ofoecils a"osent, 01a.yetone, medl= d -ark Cray,, o c ca, si on��t Iy� f inalv Micaceous" Nlicrofossils absent, Clay -stone, merlium dwark gray, subconwicioi—al frac,=-s, with occasional lenticles and laminae of medi,= gray silt,,r c3la�r and msdli-far light grnv siltstoue,, Nlic�7(,fossile absent, Dli tla�l 5375-15470- "1 ehal 9 as -On 'Vora 30 abc-ve, rare -Rv,.,r I te. o r,� Racqjqrz V, 7?Y5_a_x8O 5o 0 a 54 -y sh-U-S, Medium dark finaly. aizc� cao- n�, with laminae ajad partinp ge of mediwa C.r4-,,r sill I�y- clza,v shale wid medium gray siltsteac-, wkdch are occasionally cror-stedded, IPalr pokor chip cleavaget. &-p widez 1 ZA., crofossils absent�,. M Ditch 54805bW 5550-5b751 Core Dep Clay shale as in Core 31 above. Clay shale with thin beds sandstone, very fine grained, silWo argillaceous, light gray, micaceousi) partly calcareous; grains composed of subangular WAte quartz with some white and gray chert and rare black rock fragments; contains occasional clay laminae. 32 5575-55821 & MV -8 r- Z 71 0" Claystone. medium dark gray. finely micaceous. irregular fracture; at 55771 is a 211 interval of distorted interbedded medium light gray silt, stone and medium dark gray clay shale; at 55781 is a 6" interval of thin siltstone beds with clay laminae,) showing distorted bedding. an intraformational conglomerate of siltstone frag- mentso and small normal faults (up to 11" dis- placement) which outline slumped blocks 1-20 in dianeter. Micro'k-ossils absent. Di tch 5582-56809 Clay shale as in Core 32 above, pyrite common in sample at 52901. Core DeD th LA �Veu :33 5681-56889 61 6" Clay stione, medium dark gray, slightly micaceous, non -calcareous, irregular fractures often have slickensided surfaces. A 6n section at 5686- 56864 has laminae and thin beds of siltstone and very f"ne grained silty sandstone, medium light gray, very slightly calcareous,, micaceous; some distortion is probably due to contemporaneous deformation, Microfossils absent. MIUM, 5690-5780' 'Clay shale with siltstone and silty argillaceous sandstone laminae as above. Core De -o th Recovery 34 5760-57909 04 611 Clayst.-Onep medium dark grV, very slightly mi- caceous, subconchoidal fractureo with occasionall laminae of medium grey silty clay shale, Plicrofo�asila absent, 35 579C-57950 O� ov 36 5795-58001 0.0, on Clay shale, similar to the clVstone in Core 34 but with poor shaly cleavage. Ilicrofossile absent. Core De� R Mth 37 5800-5802t 21 On Clay shalea medium dark gray. finely micaceous, non -calcareous, with poor poker chip cleavage. Dip 0-30. Interbedded laminae and thin beds of siltstone, medium light gray. occasionally slightly sandy, micaceous, and vez7 slightly calcareous, with some cross -bedding, total 1 /3 - of the core. Mlicrofossils absent. Ditch 5802-53601 Clay shale as in Core 37 above. Core 29ntb RtMver ___Z Z8 5860-58651 21 6# Claystoner. grading to, 1 shale. medium dark gray, non -calcareous, very[Affingus. with occasional laminae of medium gray silty alV shale,, distorted (possib4 by contemporaneous slumoing) in upnter part Dip of undisturbed laminae in lower part is 3 I'llicrofossile absent, Ditch 5865-59441 C -11-V shale as in Core MR. Core 2n Uth Jke_ �Vem 39 5944-59541 go 0" 8�0" Intercalated laminae of medium dark gray clay shale and medium light gray silt shaleo with clay forming. about 2/3 of the sediment, Poker chip cleavage dips about 20. Silt laminae occasion- ally thicken abruptly to lenses about 1/4" thick, l"O" Siltatoneq sandyr argillaceousp medium gray, slight4, calcareous; a vertical calcite -filled veinlet cuts through the bottom 3" of core, Microfossils absent� 40 5954-5964t 10, 00 T 00 Interbedded laminae and thin beds of clay shaler. medium dark grV,, uon-caleareous, micaceous,, and siltstone, medium light gray. sandyo argillaceous,, Slight1v czalcareous, contaiaing rare carbonaceous flakes. 30011 Sandstone,, very fine grained, very silty and argillaceouse medium light gray,, very slightly calcareouse micaceous (largely biotite)o with flakes o-? carbonaceous material (probably car- boaized plant remains) scattered throughout, Ffaint odor oil� Microf'ooi3ils absent. 41 5984-5-967f, 21 61, Sandstoi-_to as abovep but with, abundant carbonaceous partings in the top 611, and clay laminae aLd lenses at 5965". AMicrofo,3!3ils absent� 17 Core En 43 44 45 M- 47 4-8 0 ke2th ILqaverZ 5967-59741 41 3" Sandstone. very fine grainedo silty,, argillaceous, medium graye slightly calcareous, well indurated, It faint oil odor is present, and there was a -pale yellow cut, and clear yellow residue ia CC14� The sand grains are of angular, sometimes frosted white and clear quartz, and often have a slight brownish (bltuminotw) surface stain. Occasional grains of gray rock fragments and coal particles are also Dresent, Effective Air Carbonate Content RVth osi. Permeability 510 b -v Weight 5972 10.0 im-oermeable 2'� 14icrofossils absent. 5974-59841 20 On Sandstone as above. Hicrofossils absent. 5984-59900 04 09 5990-60000 So On Olaystone. medium dark grV.. micaceous, non - calcareous, with numerous laminae of medium gray 0 silty clay that dip approximately 10 - Verticalo smootb-surfacad fractures splitting sections of core into subequal parts are common. The clay - stone becomes slightly silty with depth, and the interval from 59980 to 59990 is dominantly silt - stone, although It contains some intercalations of clay. Microfessile absent. 6003-60131 80 60 Clay shale, medirm dark gravo micaceous, non- calcareoas, with laminae and thin beds of medium gray silty clay and siltstone which are often crosebodded. Vertical smooth -surfaced fractures are commone as it Core 45 above,. Microfossils absent. 6013---60239 10, 0" Glaystones medium dark gray, silty, very micaceous,., non -calcareous; -the lithology is vexy Uniform except for a 241 tection (at 60181) of siltatone containing somewhat distorted laminae of clay; vertical fracturesas abovee are common, and one foot of core from 60171 to 601W has been split by two Darallal vertical fractures about 1/2K apart, Microfossils very rare, 6023--60331 91 6" Clay sbale, medium dark gray. slightly silty, finely micaceous, non -calcareous, with poor shaly cleavage, occasional verticale smooth -surfaced fractures as in Core 47, Microfossils absent. Z Core Dev t le—covery- 49 6033--60431 W 011 W30 Clay shale as above, 10 2" Siltstons, light olive gray, slightly sandy, very slightly calcareous, micaceous, with rare carbonaceous specks. 01711 Clay shale as above. Hicrofoesils absent. 50 6043-60521 W 10" Clay shalee medium dark gray. non -calcareous, slightly micaceouso with good shaLy cleavage., Dip 0-4P_ Thin beds of medium grW silt shale u-ith Interlaminatei and often cross -bedded cl.-4v laminas increase with depth, AMicrofo soils abserit. Di tch 6050-61301 Clay shale as in Core 50. 6130-61409 Sandstone as in Core 51 below, core Re� �e 51 6146-6150 90 6" 3119 Sandstoase vex7 fine gralned, silty and argil- laceous, olive grayv micaceouso non-czileareouso Good odor oil. Saturation Test, Percentages by Volume 2ip—th Petroleum Water Total 614V 4�81� 2�8,* 7�649 61434 M2%(light) 2.46�(heavy) 2.15 5.23 :Iffec tive Air Carbonate Content Porosity PermeabIli-V Weight 6141 QIP lf�_Wp_ impermeable 10,10 Flakes and rare -aartings of earbonaceous material scattered throughout, A I" bed of clay sha-le is present at 61421. The sand grains are angulax to subangulare, and are often frosted. They ars composod largely of clear quartz, with some white qaartz and occasional brown or gray rock frag-- meats. Many bave a faint brownish surface stain (bitumen?). Glauconite, pyrite, and mica are very rare; carbonaesous grains are only slightly more common, W70 Clay shale, medium dark grayt, miCaceous, non - calcareous, with good shaly cleavage. Laminae and thim- beds of siltstone. occasionally slightiy crossbeddedt, occur in the lower &alf, The beds are approximately flatlying. 011" Sandstone as above 011' C14r shEae as above. W80 Siltatcne, sandy. argillaceous. light olive gray,, slightl�i calcareous, with carbonaceous flakes and partinige; concentrated in the uippp�r half. WOO Clay sba2ep medium dark gra: � _y, non -calcareous, mi- oaceotm., with good shaly cleavage in upper If. Slightly silty toward base,. Fragmental fish Mj M Core 2gRth Recove remains and very rare flakes bituminous material scattered throughout, At 61491 is an Irregular band, WI -J" wide, of medium grav silty sandstone, dipping koproximately 300. The sand grains are angalar to subangular clear quartzo with brownish surface stain, as in sandstone above, Microfossils absent. 52 6150-61601 90 6" Claystoust, to clw shale, medium dark gray. no*�_ calcareous. occasionally very slightly silty. Irregular laminae and bands of medium gray silty sandstone and sandy siltstoneD dipping 0-35 0 0 are present. and rarely are distorted by con- temporaneous deformation. One banda at 61571, Is 40 thick, with clay laminae in it; another. at 615919 is 60 thick, and also contains clay laminae. Microfossils absent. ki tch 616C-62321 Clay shale as in Core 52. 6232-62701 Interbedded sandstone and clay shale, Sandstone is dark yellowish brown, ve,,7 fine grainede with browa (oil?) stain,, and is very slightly calcareous. Grains are angular to subangular clear quartz, with some carbonaceous -oarticles, white quaxts and dark rock fragments. 6270-6430' Clay shale, medium daxk gray, non -micaceous to very slightly micaceous,, as in Core 52, Slight amount of sandstones as above, 6340-63501. 6430-6440" Clay shale as above, and sandstoneo very fine graineds silty, light yellowish brownt, grades to silt -stone of same color and composition. Is finer grained, lighter in color and tighter than sandstone at 62401. 6440-64801 Clay shale as above, C o re Ap2th jjggvea 53 6480-6490P V 3" 167r, Sandstonee very fine grained, very silty and argillaceousp ligbt olive gray, non-calcareouss with scattered laminae of medium dark gray clay. Sand grains are similar in shape and composition to those described in Core 51. 0180 Interbedded thin beds of sandstone as above and medim, dark gray clay shale� 10100 Siltstone, very argillaceous, slightly sandy,, medium gray, non-calexreoub, grading into 06611 Claystone, silty* medium dark gra6y; occasional 0 very silty streaks dip 15-20 110" Interbedded sandstone and clay sbale as above, V80 Sandstone as above. 141crofossils absent -- 54 64090-65000 61 on 107" Interbedded sandstone and claV shale as above. W6" Sandstone, very fine &rained, eil%rD argillaceouso medium gray, very slightly caleareouso very unifcrm� Fair odor oil- yelloW eat and resildue 9 11 KE Core t, h jjgLver In 0014- Occasional carboaaceous partings in bottom 30; just above the base of the section is a 3/40 bad of fine to medium grained silty sandstone with small scale crossbedding. Effe--tive Air Carbonate Content Rgyth _.k2E2si& PermeabilM by We ikM_ 6498P 4.72 impe=eable 16 r 5PP7 00110 Interbedded Clay shale and eilty very fine grained sandstone as above. with silty laminae in the clay shale. Microfossils absent. 55 6500-65101 91 61, Clay shale. medium dark grayo non-calcareoust, very micaceous (biotits), slightly silty� Poor sbaly cleavage. Rare flakes bituminous aad car-- bonaceous material scattered throughout. Microfossils absent. Ditch 6510--65551 ClV shale, dark gray, very slight4 silty, non -calcareous, very slightly micacecus� 6555-6590, Interbedded clay shale and saL,(Istoaee very fine grained. silty, argil- laceous,D very slightly calcareous, composed of angular light brounish clear quartz. 6590-66200 Clay shale and sandstone above; sandstone decreases to rare. with depth. 6620--6740c, Clay shale,, dark grVi, pyrite rare to abundant; waxy tan clay in some samples. Shale becomes darker with increasing de-oth. Biotite specks in tan wa.-qr clay fragment at 67dX.0. Rare ;rounded quartz �gaias ao in Core 56 near base of interval. A sharp lithologic break between Core 55 above and Gore 56 below thls ditch interval cannot be determined more accurately�from the ditch samples, due to bad contamination of samples by caving of the shale from further up the bole�, Care imMh im—Mem .56 674Z, -6753t 21 6" Clay shale. grayish black, Maly to subconchoidal fractvure, Mritic; clear quartz grains. medium to fino, rounded to very well rounded, sometimes with ,K'Aghtly frosted or pitted surfaces, scat- tered 1hroughout, The lithology is the same as the UTP'_)9r Dart Of the (1pebble shale" of the - (ie� S. Barrow Test Well No, 3o Barrow area 12651 to 162-51) and as in 8impson Test Well No. lo 52900 to 55701 � A 1" bed of limestone, deasep argil"'aceous,, medium light gray, occurs I" from the top of the recovered core, Micro.,10zails Common. Ditch 6753-665W Clay shallee dark gray to graviah black, hard,. rrrite aad tan vax'y clay common; light greenish grV clay fragmeats rare. Fare quartz g -rains as described ia Core 56 above,, A 2 mm. well rounded chert granix1a at 67601. Rare frc-:,,Sments of sandstone, medium to fine grainedo of rounded 21 to well rounded clear quartz and some blue-green glauconite grainso with calcareous,, silty, pyritic matrix, occur from 6790 to 681W. Occasional pieces of shale with laminae or small concretions of pyrite are scattered throughout the interval. One ?iece of pyrite containing brown, soft, well rounded, very fine sand size grains was found at MOO. A sandstone fragment from 68501 contains bituminous flakes. Core De]2 Lwoove 57 6649-6859, 58 Off Clay sbalep grayish black, good sbaly cleavage�, with quartz grains as in Core 56 above. Pyrite very rare, Carbonized plant fragment on one bedding plane. Mcrofossils very rare, Ditch 6860-70401 Olay shaleo grayish black, hardv with abundant pyrite, sometimes as concretions or laminae in the shale. Fragments of taal, wsay clay are rare to,common; rare to abundant rounded clear quartz grains, and occasional granules of black cherto are present; fragments of very fine grained brown sandstone and silt are common, Slickensides are on shale fragments from 68901, 69009 and 69300- tan waV clay with mica Darticles occurs as laminae in a black shale fragment from 688W_ Brown limestone fragments were foun4 at 68801 has a 0.5 mm. veinlet of fine grained sandstone lamiaae are p at 69001 and.69401. "Sandstone" mad rounded medium to very fine grains o glauconite in black shale matrix are 6930, -, it forma 5% of the sample at at 6950t is composed of black shale at 68601 and 694W; a fragment Lrk brows quartz. Brown, very resent in black shale fragments of well rounded to very well f cleax quartz and blue-green common in most samDles below 6960' and 69801; 2.5� of sample fragments with sand grains scattered through them. Greenish gray wazy clay One piece of shale at 69801 grades from grayish black with bituminous (7) flakes. One piece of has bituminous flakes, C ore DeRt Llecove 58 6929-69321 01 Off 59 6933-694V Oq 0" is present at 69701 black to brownish sandstone at 70000 60 6942-69520 09 00 61 7042--70521 30 off 10 9" Claystoue. grayish blackt, pyritic, with rounded fine to medium grains of cleariquartz as de- scribed in Core 56 above, VV Clay shale, grayish black-, slightly micaceouso p.vritic, with quartz grains as described above. Good shaly cleavage� beds approximately flat, Ricrofossils abundant, 22 Core 62 7052-70621 51 0" Clay shale as above. i1elecypod shells at 70601, ulth rare fragments throughout the recovered coree NUcrofossils common. Di tell 706Z-7604� Core Clay shale, grayish black, hard, as in Core 62 above, with rare T rite,, and rare to absent rounded clear quartz grains from 7062 to 75501, couanon to abundant 7550-77601. Coarse to fine grained well rounded sand of clear quartz and glauconite in a black shale matrix is common to 7MI. rare from 73401 to 77601. Black shale with abundant blue- green glanconite grainso but no quartz, Vs rare to common, increasing with depth. From 75601 to 77601 very finesand grains of white quartz and a small amount of white calcite, angular to subangular, vary from rare to abundant and increase with depth. Loose glauconite grains are common from 7630 to 77601. Brown limestone is common at 7360-701. Two fragments of large sabangalar quartz (?) grains in a pyrite matrix were found at 7550-60Q. Ditch samples below 61000 are probably badly contaminated by cavings, and do not represent accurately the intervals from which they were taken. The electric log shows a pattera.typical of shale down to 77601� from 77501 to 78041,, however, Is an abrupt, large increase in selfpotential,, matched by a smaller but equally sudden increase in resistivity, neither are, reflected in the samplesc. which contain nothing but black, sh--ale through this interval, 20 _Dt h 63 7604-78148 AtMvea 100 0" Grayish black hard massive argillaceous glau-- conite "sandstone",, As seen in a thin sectiono the rack Is composed of approximately 76'%5 medium to very fine,, well rounded grains of grayish green glanconite. The matrix is largely black clay but contains vez7 fine sub- angular quartz grains. Many of the glanconite grains have brovinish rime and some seem to be largely altered to a brownish material. Two or three similarly shaped grains consist of a yellow earthy mineral and one is reddish; these may be limonite and hematite respectively. A granular to flaky shiny rei mineral,, probably hematiteo is scattered through the core, The abundance of glauconite and of hematite vary, with the former decreasing and the latter in- creasing to 40%. In zome sections. A hematite� rich fragment has a specific gravity of 3.35. Microfossils absent. Di tch 7814-7829'3 Gray and black shale. 23 Core AR A 1192-1-2—M 64 7829-78391 10, 011 510" Siltstone, medium gray, argillaceous, well In- durated. non -calcareous, very slightly micaceous, with abundant intercalated laminae of dark gray clay totalling about 25% of the rock, Grades into 510d Siltstone as above but medium light gray; lighter color is due to decrease in clay laminae,, which are a minor constituent of this section. r iffective Air- Denth ForosijZ Fermeabili�X 78351 6A less than 1 md,, 14icrofossils abseat. 65 7839-7849t 81 41, Siltstone with clay intercalations as aboveo Microfossils absent. Cores 64 and 65 (7829-78490) are very similar lithologically to the Lower Jurassic of the Barrow area, though the rock is slightly finer grained, some- what harder, and lack: the greenish tinge of the Barrow section. 66 7849-78571 01 0 a No recovery Ditch 78.57-80201 Siltstone as in Cores 63 and 64 abovee, probably with some black and gray shale. Well cuttings through this interval are composed almost entirely of black shale, most of which probably caved from the over- lying beds. 8020-81041 Black and medium dark gray cla�, shalee with rare pyritee make up the samples from this Interval. The electric log has a curve typica of shale, except for some small "kicks" In the resistivity between 80351 and 80601 which are not reflected in the ditch lithology. Core Real -I 67 8104-81141 71 60 01V 3;�aleo medium dark gray, . non-caleareous, finel;r micaceous, fair shale cleavage, Dip 00 � Minute streaks an.d lines of pyrite throug.laout, Pelecypod at 81131; microfossils absent� Ditch 8114-82150 Black clay shale as in Core 67 above. 8215-8275% Siltstone, medium graye very a:-,-gillaceous. 827.5-8629 Black and dark gray clay shale as in Core 67 aboveo with some medium dark gray argillaceous siltstone betueen 85601 and 8629�. 68 8629-86340 50 0" Claystone, mediuA dark gray to dark gray, bard, spareely and finely micaceous, rare finely- disseminated carboaacecus flakes, slightly greaay luster under microscopee no cut, Non - calcareous; thin laminae and lenticules of light grVe hard silt shale� Dip up to 30. Microfossils absent. 24. 70 S200-OV2021 l(I 01U, Clay etrale, silty, dark grV, slightly mic-a- ceous, calcareous, haxdt, w.Ijtb wamerous laminae of medium gray hl-ghly calcareo-as siltstons, Microilossils absent, Di 9202-93801 Interbedded Calcareoas oiltstons and black and erqT s -],-,.ale as above. 9380-.94161 S&adstona, eilllceous:, very fine gzrainat,, light gray, Core 211�-Dth ktsmu 71 9-4j 06�-9 4,26 Saxndstone:-, vey.7 fine grained, white, contain- ing 16�29�o dolomite (7), probably cement,, lGrains are -pred".0-Minantly subangalar, -with moderate, sphericit,7, of whits and clecz quartz, often -�r a s t e ei-'., 13. -me g�aines a.ra clear anollar quartz - of lot� zvhericittv�- "J"ark rock f4ragments aad 2r, 0 Di tf-�% 8634---87211 Black shale as above, From 8675* to 872-11 the reeistivity curve of", the electric log has a pronounced Okick'; the self potential curve has only' a slight out'Feard curve. Zo change in lithology is found in the ditch samples which are probably largely composed of cavings from above, 8721��Z7900 Sandstone, very fine grained, silty,, elliceous, olive gray, possibly with interbedded siltstone and clV shale, 6790-8830t Although the ditch samples through this interval are black -and medlum dark gray clay shale f0eith one piec-9 of tan limestone at 87901) the self potential curve on the electric log shows as large a value as ill', does opposite the siliceous saadstone in the interval above, 88310-88401 Sandstone, very fine fgrained, white, with some grains of glaaconite, 8840-89171 Black shale as above, in the well cuttings; the electric log has a shar A P ' peak- in 91whe resistivitv curve from 88600 to 8880, which 4s not reflected in the samplesu� Dn't kism-erz 0910 Siltstcne. ve- 8917-892.10 sandve medium light rrW, ver.7 calcareous, hard, gla-aconite grains and n- I-aute stre.aks carbonaceous material. 21011 Glay shaler dark gTz:W, vex�r slightly r-,Ic4aceous, with fair sbaly cleavage, dip less than 30� Triaszic pelacypod (Monotis or LIQLO—bislf Pressions common. Microfcssils very rare, D -I tcI I 8921--91001 Black shale as aboveo with siltstonee very, sandyo argillaceoust mediux dark gray to medium light gray. very calcareous, with carbonaceous grains in the darker fragments, 9100-916W Siltstone, as in 6960-91004 above� 9160-9170, q Limestone, dark brownish gray, very slightiv sandy aad carbonaceous, 9-170-9200-9 5-41.1tstone, veril calcareous, at., above. core Dept Recove 70 S200-OV2021 l(I 01U, Clay etrale, silty, dark grV, slightly mic-a- ceous, calcareous, haxdt, w.Ijtb wamerous laminae of medium gray hl-ghly calcareo-as siltstons, Microilossils absent, Di 9202-93801 Interbedded Calcareoas oiltstons and black and erqT s -],-,.ale as above. 9380-.94161 S&adstona, eilllceous:, very fine gzrainat,, light gray, Core 211�-Dth ktsmu 71 9-4j 06�-9 4,26 Saxndstone:-, vey.7 fine grained, white, contain- ing 16�29�o dolomite (7), probably cement,, lGrains are -pred".0-Minantly subangalar, -with moderate, sphericit,7, of whits and clecz quartz, often -�r a s t e ei-'., 13. -me g�aines a.ra clear anollar quartz - of lot� zvhericittv�- "J"ark rock f4ragments aad 2r, Gary minute 2artlelei are present. thwuCh raze; pyrite and mica are absent, Silica is ajac present a* a oementing material, Iffective AN Carbonate Content, Dants by flighl I -k GO i1permeable WAR YieroAvAle absent; pe>Aypods ram, 72 womal Sandstcne as above, V017 light graYr BUGOOF w3jity, 11th 51.11 earboAatz coateat (larZel 1Y d,.KcmAQiK kicrofossi!8 absenk iwpi 94MAZY White calcareous sandMae ae K Oars 72, Q012 DOD A 5433-R&W =1 0" 0101 01,7 Kjae, meNum graj, siliceouz, hara, elightly micacecos, witl fair shaly cleavage, Shale flakes in uashcd sample range in color from dank gray Wo, lQbt Hounish gray apparently becoming lighter with increase in silinx� Pyrite absent, HicroArsils abeGnO 21101 Saadstcvez yezy fins exained, siltyn light gray, very hand, tigh-t1v r - cepented. with varFing pro- postiour of silica and caXboaatw Warbogate content at 94351 is 6.6%,,at 9450' is VIN/c, and at 0450, is 27M VertWal fractures are pre2ent, one bar a coating of Minns a7ystals of Clear qwLrtz, irregulw partings and interaslationa 0 -2 - medium AU jXny siliceous, slightly Micaceonl clay SHIe a's scattayed througbout, especialij,' in the lower part, and axe conosutraled Q M'' bands at 14341, TOW, 94441, aad MOn 7�racjaic- 1 2�. 0 a ( Ir spQ she!18 aad Upresslaml," are rain throaghout, iacxeasiag W tOMMOU at; ?438" nod 14481, The folIcKag is quoted from a report, Qtsd Aug, 2, 1951, on a sample from MY and at prepased by josiah Bridge of the UMGO, in consvitation wath G, A� Tooper and D, E, Dankle of the V� S, Natinaal wassumi, Whe saxple sontams a few fairly Wl preserned brachicroiz to Lg�p.�r aa d m leaVOke bodiss --,,M:,,h M�T� Dunklo UnnWiss as Wth of a neLocauth Wh, The brashiopod bas ao dia6roMs value, The fish WAY hGUBWO aro 80ilaT to Onee reportsd by 5, Dn Brazscn f7cmi the Phoupbarla fermation of V70MMg, ant to -ones reportal ---ack Prc-m the Vale formation of, -x, Dax-,izin states A& he has seen S1012ar teeth WOM the UPSON formEtIon of Woming, &I A theta formaticns ave clasesd as Permian, and it Core 741- 76 ,27 228-21-h seems pl,.-babl�r thase.snecinnens should be Con - to be llssrmiaa�4 I'-UcrofcPeiIs abseat� 9465-94:5811 3q ()M Sar dstcz�e as above, lwdrth clay -intercalations concen.t.-ated in ul2rer foot,,. Tknin sections frOM;, the i;tp.T:4j--r part of tha care show no evidence of metamorT.I.Isui, Sone graias kLaave been enlarged byz the i-4epozjtion of silica. in opticU contia� 1�y wi- Itib - the grzaiu, more commozI 7, thhe grains have befu rougherod lay soiutiar4, The matrix, wh.iclh ccruplstel'v fill, fa -Intter-gralu areas, is a T:uIIMtux'E of cl�ay and anornnh�ms silica, -Ath a little chert, 1�iiueral g�ains, other than quart2t, ars Vely raxe� cy A -L. -of 0 2 Z-' 1 2 abqerlt'� 9 14-159 - 1? 46 21 31 0 0 2 a n d s t o r za, v a ry JF in a �7 a I n e d, v e ry s �4 11 ty , a I i gI - T. 1,y - 111,00or-S, Medium gr4u, aon-- Ter"�' SL calcarecuts,, non-micasccase massive, Ath stref-lars arid intercallationb of ziltstoae and irregulax cIV partings. especia,,I�v in the lower part of th-e 9A-62-�i492,` 30, 011" latraformatif_'M,�-zl conglomerate of sm-all, usually fl -at, vubrouL�d to simbf--agular' dark grW ON -Ile ,:)ebbles lxa to "in diameter, scattered *n a, matrix of, sand#tar.e mhich is CoAtinuoue wit;zh o::u-idEto-ne"ImmediatelY 'below. The top of the --o-Ma- glomeratic layer is sk.ajrnu�er, and "aakes Pat 'Z=6ga- lar consact. -,��.dth the sandstone descrwibed in 'Cporz 76 above� Scattered m--i-sbble�a are alea present� "�,:n the uppe:-,r �3-2nds�oae described below, 22, C; z"iltvtoua, ve--,y eamdyr, argi',laceouz, medium dzr-,.- gr-Wi, vez�- diliceoue,; mcdium A -ray Siliceous Sand- stone at the, top of this interval grades into the siltstoap_ -:Inzercale.ti-�)ns --ad irregu-lax partings 0�11' da-ric V'ay clay are, Common- The Siltstone --Ibr:aake ieragularly, but voTi..-icall fractures exteraid th.,-o-agh FI-Cach of the core, S -mall brachiopods (Lirn �a sip ) are z;--xq tb-rovg]I,'ioj,t, and more aumercus :al. 94AES RAPO, aizd 94E,01, 0 1 .-atrafo-nnation-al aonglcmsra-'��-e as described abcve,, but mediumr. gray, 4�n core 75 abo-n,� &adf'�ag :-4z.�to m-otstoz.�'e as d"'96cribed abcve- L 4" of t�hals, madil'um. gray, it-lir;ec-as' ."'i ''res er-� 't 94F ,27 2cm th Cox* DER —t 77., 9492--9522' 30V 0# Siltstene as in Core 76, with one 1" bed ad two 2" bedz of zandstonef medium gray, very fine grained. slightly NIQ7, vetF siliceous, LOU- calcare*us' massive, between NOT azd 95010� Vertical fractures are common, and often aye Plightly oil stained, from oil added to i;he zili)LI-ing mad, 0111" SardttOW 7SqY fine grained, very silty, medium gray, 7ary cilicalus, non-calcareOus, MOM iulk- vo'-�7 silty Medizz grgy MY shale, ve-ZI7 siliceone, with conchoidal frac- 0141 Ray Watle, dark gray, slightly siliceous, with stit,y --aminae, goo? shaly Asavage, 1931 Sandstone as above, with two 1" bands of ell 7artlngi V and 11" below the top of the intervalc 1029 Siltatone as at the top of the cor, 10" Olgystuas, grgyish red. ve, silty; contact with siltstwas above ic irregular; gradational; bass of claystane is marked by intermingling of gra-Y and red mottled WK and siltstoneo and irregulaX- patches of reddizb color p5raist in the underlyiag gray alty eankstone for about W 2439 Sandstune, Ana to very fine grained, RIQT� reddish exay to madina graV� very silioeous, non - calcareous, grading into 0191 Siltstone; very argillaceons, medium gran ver&F siliceoas' noa-calcarsoas, grading into 3191 Claystone, very Alty, dark gray, very eililoons, with scattered minute carbonacvOus and pyritic Patchasp increasing ja nine with UPS,, to subconcholdal fractum, 107" Glaystons, medium gray, slityr very MUMMA non-caLwaxecus, with small scattered saaA4� PatchaF, in OPPSY Paxt, ani occasional small medium dark gray Panchez of carboaaceows xateriaL OW Q,Totnae ae abcTs, vory silty, mottlah with graVish red colox, the latter Wareasing wW-I (:te p t t. o'81 ClaVstuae as abana, but grayleh red throughout-, gTading to 1"06 Glarstdae as above, with gray and red marbled appeawrLace. 030 Ole"Wasp medium ligot graya with occasioms! small PS& patches� very sillaeows� with rape silt ani sand grains ant rare AM slickennidw Ally, 016" Yarblen grayish red and gray claystons, 0,61 Ciaystuns, waijum light gray. siliceous. not WQ� ElAgIC; rszy appaarance, C, o re t'ine to ver;,r fine, graineel, ziltv, A SaAe-r-Itly Siliceous, non- r -a-1. care a, e" grades intoo 0 4 6't Gongloruaratic Saadstoaa, Med"LUM 9r_V to mediUM dark gxzVr, fine to medium grained, silty.. sil-Lceoue: with scal-ttored Sabrownd US& Chert peblbler,� Up to !IaAeter, and small dark gray carbona-ceor-15 matchms' $andat,-,ae as 4raterval oiyerl, Tlgl M r I ying m. o e a t sj:_� nd S toae' "i cro f o si ab sen t, Hav Of the cores deccr4beal '!�elwo wers. S'. tom, Is � A the tee!! ��Ate to avoid ad a exceas:�.Ve S'Rin-ping kyeight.� t,!,Ee tha-1-Ckness ttAe sam-ple recelived 411a the Fairbanke ,.s pgjyep� in parerxtphesis aft-ar that of th-0 interval iVI re"are sent$, 7 C 95103-195381 ligbt gray, Ath white" gl'vc 3.af4 15" v'511 "'Ongiomi—ate, - pj�tere'a:) ehalk'y- app ear ing Chert Pebbles up tc% c coazse �i� -a �.tameter ia ta matrix 04 Is fize gz-ained q�iaLrtz ssm.d with Siliceous CeMsat 113" 5andstaae., fine -to miedi-= gra-inedo light gra;�,, very s',':..Liceouz, comTfosed of zubrouad to anCala-r clear -d white chert grains with vary rare -'a3angalar white Chart peb"VIes up to La diawmBter, Coatact wit -h conglomerate above az,cL bea-ov7 -14.s ir�negalar, but not gradational. 4490 eW'5r) Oouglom7srate. Ara ill�def-Vaed band, c -:bout l' -id pebbles andi half saudstoae miatriz, w ,e . cark s V�c dhauge from. sandstone to conglomerate, , m The am' matrix in thiz u, pper I" are to those Of the canglorwera.'_"E' tiolow, tle be-ing ia t-lbei-r proportior a., The congloiat�.rate peb-bles are predowiaaatly whizl;e chert,, *-f t�en alt;srad (be-ILOre depo zi tion in thas coxazzlo_.�v�-ate) IWO a chalky, appearance, tho, their has aot beez. aT.?prec4ably af-fecte-e., Abo'ut 20,�', of the pebbles -axe black aad C -Platy cherk one or tu-o light green chext --pebb.'les, and ncrm vien-al ;�;ray or b:rownisb gray silicsoaz e*11.1tcrX"-;.e. he an e pebble -s iwre also present,, T, . p ot b I a F, r g, f m Coarse zand size to 3/4" in dlameltler,, tbiough ays'��t zare be�ween 1j8P and 1/4" across, They ars aaga.11a'�7, to subroanded, and u-sAmv:11 3.7 of low c-'Vty, 'The awad Is clear and white a rtz, fiiine to coa��-�,o graiaedv� aad vlt�",, siliceou.6 ce"llentr. makes ul:,i approximately 2.9% of the roelk" Sandstz"as' Conglameyatile, vary fine to e0arse Siliceo"'Isr, lig-IAs gr8y cb'ert up tc 1/0 n dia'wetey� i n Vu e �j e kj t I j fr , - '-; -, �' " 5, n',ds Ic t�e, az a 031 atervall s:bove, g "-Z'- i- tc --rad' Go�-s 0 De -o th 'Recoven, 0'41' (0119 Sandstone as in 60 interval above, gradiAg ifito 2, 81 W119Congloms-rate, with vhitet b'j'.ack and &.-V chert pebbles up to 11 in diameter (averaglag about diE��ks' r', au:brou-nd to well rounds.d, of lak, apheriaitv,, u-Ith occasional ro=-ded siliceous .qaadst.-),:;iv and sUltstone pebbles, Itiatrix com- -Cpr i sea Lp-Droximi ate ly ld�-11 of the rock aad -41 a compos�i of J"�"iae to, coarse gra-11 as of clear and' ajart2;r i,4th -some chart,, aad --riliceous --ement- 0133" (0130) Gong.Lo;-_n�ra,te as above but With 701�7 matrix, -nslobles� the lattar ra-rely more than in 0"'16 �'OIr�) coaglom�:�.rate a�s above� but peb'hles more numaroas Oap to .501� cf rock) and lare'-er (up to I" in i am a te'�J' 1-'0" Wor�" ;%Onglomsvate as above, tut rebbles averap-,- in diajaaten, and -=giag up to :3/411; matr�x is fine to coaxse sandt siliceous cem,3nt,, and wic3rosi�-opic. double�eaded,, euhedral quaxt2 or.yetal's occurriag ---a ��sugaryO llntersticla2 ma- iterial., The bass ofl� this sect -on o -l' as rsc.��:Lved in Fairbaak,,,�,, has a thir. coating o -f -Iark, cla�v wbidc."t aV mark the contact with 4he secli-mente., (G;i-'"N3anCIsW"_I'sF, with stre�&s of sfitstone -and thl a J. �u�o to thick) beds of clay ehale,, The ,,; d, t rA 6 E mediwr- light gray, flits, to roarse, ed com ad of -satan,'Mlar to gi�brow-,A. cl'�,ar 'b -a D _r t. z - rare vl ite cbsrt A-r,,d -very ra.re "7a.Uu!_.a--_ Of whit�a enext, smd Silil-eo-as COUIS�-�t' Me ztreaks are aumerous., Flad %,v W" to the s&n.ds"Joas ia; ctc'� or diffe--ing i -i gxa`"a siz7s, 'ilsy zha'ls is also rdedium ,4--r t _'TI-vay, aaa Silicsous, wlitl fainit; laminaG whi c.' " adica-ts Uzat the beds are &pproximatS-Aly it is Silty aad Slightl;y' SandLy, and gradeve -G� 4t make E jai; up at)oat '10" of p1as Gactio-q receiveuL I ?�' - U o 44� 'reryr S?Z�4y" Medium light -ray, vGry ,n--licemas, ir-regu.1ar to vu,*vco ch i 2. fr", t b -�(I of clay -?,tone, medJum Ught g7 J, ay, --act -o, prezeat I" below the to,c�, o f the ay e to las. a� i1a eiltstone i�-atsrvc--_I _-'hove' gray, fine grained, cox�,xsedd of —Car glra�ins 1wit-lb, siliceous cement, pax,.; D' sq�tf ter t. 'r Are 81 0 .0 OR Q A—enon—YeAzz chert NewcM of amorphous cemeat and the grain sise increase graduall7 with depth, Artical ad irregular Wrizontal (bedding qlaae?) fractaren are present; the latter arc more 3amerows toward the bottom of the sectiop,, 0140 (014") Conglomerate of subrounded to angular pebbles 1116" to 2' 0 diameter, corposed of very fln,,R grained clear qqarts sandstcne VA much QW: ZAK ziliceous, Microc,stalline j?) cement,: The pebbles are hold in a matrix of We to coarse grained clealr and wo4v q�iartz witb silica cement, thich Is harder than the pebbles, and comprises atout 500 of the rocV 1000 (410) Sandstone, light gray, fine graiaed, ver7 sili- caous, Ath some amorv,hous Kite cement, Sand- stone is massiven and has vertical fracturez'' aad occasional laminae of sliGhtly finer, slightly- carbonacecus saadstone, A thin bed of sil%r silics'aus cla'rstws' if",? thick, occoxe W21 balow the top of the section, and waz deposited oa aa_V� andalating surface that mly represent a wids, shallow ripple Tarko Sandstone below the clay - stone Is very zlightly darker, slicAQ more silicesus, aad has less white amor;Oous cemeLt than that above, Microfossils Ment., 0" 1100 (04n) MadAnne az above, 10104 (40") San&Qas� vey fine grained, medium grau vez''F silicezuep AM Z" Ads of meMum gxqr silicenus clal Male 11 aad 4164 below the top of the .sectioa�_ The sanAtoue Variez sliehtly in colon, becomial vezy slightly darker Kea KIM= lighter when the sand grains are larger, The whi to, amorphoas cement of the sandstone. above. it laclin&' COMM 231 0" 1614" (314") aaadstaze, 7ery fine grained, slightly to veKr zMX; light gray to medium light gwy, vary SiMCDOUS, aom-aalcareous; Oltier sections aTe zligbthy Orker tham the coarser -grained Atenva1z, Two *' beds of medium dark graF slitatone. si�n� esous, sxgillacsous. dip appxazlmately flat-lyingf, occur in the AM 11 of the secticno 01100 (0110`1 sha2v,-, dark gray, non"micaceous, non- calcarsous, not silicsous, occasiona:. �ATeak_,. of pyrite, ani Wfnae of slit containing saw--:� magular sand grains. Saboancholdal to ehajr 34� fractars-, 0171 (0175) WtWne. w3diam dark grAy, sandr, slightly, carboaacaaas, very ofilescus, non-calcarsome, with some MY shale as above. 0 0 Ours ASK hoom OW" (013") Clay shale as above, 0111n(O'll") Wltoboae as Kbove but with less =14y shale. 119" (119") Clay Mhole an Dover with beds (up to in thick' of slitatoaq crossbodding and "swirl;7" beddine, in 54., 000 (019") Siltstone as above,, 110" (110") Glaynnone, similar to clgv shale Nova but lackk_ ing siltstone laminae; has concholdal fracture sad oacasional polished surfacee, sometimez wilh Makenzidez, OW 00") laterbedAd siltstoae and clay shale, with layer Gf intraformatioaaa conglomerate compored. of flat, rounded shaLe pAbles in light gra4j SONY, %KWOUS matrix at the top of the sec- tion, and a few similar pebbles M the base of a sazxay slltstoae bed 6" below the top of the ssatlaz� WarcAsHis absent, DI t :Q 9597-97701 laterbeWed. siltstona, and Waystone, as Q cores Have; magy fraZwente have cartonaceous partings, 977D-97951 Red cl,yetone with some rsd VIVO= 9795-98130 Eed sandstone, fine to varV One givinea, very calcareous, non - Micaceous. —Or j1pth khallia ak 980-93210 56 'Bed ANN Claystone, grayish red, often silty, AS WattSred Saad qTAaS, M7771 finely micaceoue paor to gooii shaly claavkge, strea1f._z and iryagWar be?s (up to 0" thick) W. silt!4!cne, v,,d silty veZy fine grained sandntoao- grayn& red to VQt glaj, slizhtly to Ve4y va> careovs� The sand gpaiaB are clear subanguior to zubroW partz, with rare colored (reddish, black; gxeenN ,7 QaInS, ana MaAMO (7) and calc_�recus cemo�,aK Beds approWmately flat- 1,yin,g, �Microfozsils absentc Atch 9621-98450 Saadetcae� brick red and light red, vVyy Mae grsiao& caleareouz A part, nov�Woacsouvv Vezy slightly silty� HOOKY LIM gray clay shale (?), 9855-99001 Ted sandstonso AgFstona, mW cd_Itotoae,,j-, writh interlaminated red and green clay shale, 9900940 Bed sandstone az abcvs, vith streaks red chext coaglamerate ''pebbles up to in diameter, POSODIV lurgnr) QcTeasia -a with depth, and- Waar smount of red slAystwont 924>9960? AllerDsQnC red sanisteas and claystone, azi red and Tsen clay qAale, 990_9920 Wmeptaae, blus-gwayo SUM 7STV NIS�ghtly - calcite VeMicts, 99901010575 Red sanletone with a amall o.,,F rs�". cla"etone as above, Bitc;l 10,0312-110,040' Z Ead sandstone with iniao,2 a-mour-01:Ps Qf ala�rsstone as 'n the ditch samples above. Da. -k gray c-Ahert --OnglowerLte z:rd black -nirbonacsous cl4vstone and C " ay shale as a Co A. res ef:5�100 Coal seamp blac2r, s-,�'bvitreouz luster, hanrdk, Dark egra;,T chert, oaaglonu,-�rat�s id,111,-'b smA-2,31. amou:�it black clayszi�ne near b,ase of `ntervall, Gore 9 —rIt —Re 1;0 —Ve 3 65 10,, 226- 10 229 3. 3 gray, IFebbles ;,-�age 1rom 1/115" to 1,120 in dia- meter,, but moet i�xe so -me ara seatterl'-d' tbrougk- the ccaz;se tje f*Sne grained saady matr�zrl and some are copceatrated in thin irregular layers. T -hey are cozmpose& of subangulaz tj-lhitso greq an,�' black cher%� The ruatzix consistc- of -A ZuvLT--,!PJIar cr�arsE? "'0 ve27 fMO gr-aly-ls Of same com.-position, itdt-In some st-Ity z -z -,d Inte-n-st-itia-31 materiaZ, I;!%-- uhfle well eemante�d byv al z a -1 s c D"ax-i-ex'r Shaller streak�l,� ofte'n. I. IMS ma:rking p�artings, dUp vdth� cs�bazzlaacaous; fil appp-,Paximatelf,r 355 0 c and are- sub-paxa-11al to tho bads, I, few Patches Q-A" Mill.7 qaaxtz cvt aerces matrix and. Deb-bles, IL'ni;,te a7�d zal hes 4 c of' yrI tA.,e are alr4c. .p. aaAd �n the -pebbieo� alDssntc, i 2;� SI -11 C, 3 8 41 kltez�natiLg daxk gr�&� hksX-,'t, csX-bCT- eous CILS;jr- ,; C st-loa-3 ae I -a Corer, U-10�), 0 rc- -Z---eoth Recovery 8z 10t,007-1010171 0q 39 oaglokiez�te of subano-aar pebbles of red, bi ck and 14-ght gray chert, ranging in size from coal -se, sand to 314" in diameter, with most betweea I/JIV and 1j4' In diaxeter, The matrix,, vjhIch makes up a snall proportion of the rock, contains zn�.11- round.t2a clear (raartz sand and silt,, and ca carec-u-s and humatitic cement, No bedding is visib--Le, though the long a-zes of the -Debblez usual4r :?-,re borazcir,tal� The rock racov'ered probably cama fl,om the to -o of Whe intsr-f.,a], cored., E,. 1 -,-:ro f c: s s I I z ab s a ra t 64 10c.017-10,0221 511-totcn-18, Very zaatpr� vei-y a--gillacecus, GrV, 4A' 1.�,-Ith hemp-'Itic cwent,. cl grains aze wicstl.,T raddish (--From surface staknl) q.tiarts, often with frosted surf,-:�.cez,, Augalax clear. quartz, WbJAe IQU-07t-7 7nd trhi,ts char " cra4 n,, -j. are a" so - present,, absent- Bitc;l 10,0312-110,040' Z Ead sandstone with iniao,2 a-mour-01:Ps Qf ala�rsstone as 'n the ditch samples above. Da. -k gray c-Ahert --OnglowerLte z:rd black -nirbonacsous cl4vstone and C " ay shale as a Co A. res ef:5�100 Coal seamp blac2r, s-,�'bvitreouz luster, hanrdk, Dark egra;,T chert, oaaglonu,-�rat�s id,111,-'b smA-2,31. amou:�it black clayszi�ne near b,ase of `ntervall, Gore 9 —rIt —Re 1;0 —Ve 3 65 10,, 226- 10 229 3. 3 gray, IFebbles ;,-�age 1rom 1/115" to 1,120 in dia- meter,, but moet i�xe so -me ara seatterl'-d' tbrougk- the ccaz;se tje f*Sne grained saady matr�zrl and some are copceatrated in thin irregular layers. T -hey are cozmpose& of subangulaz tj-lhitso greq an,�' black cher%� The ruatzix consistc- of -A ZuvLT--,!PJIar cr�arsE? "'0 ve27 fMO gr-aly-ls Of same com.-position, itdt-In some st-Ity z -z -,d Inte-n-st-itia-31 materiaZ, I;!%-- uhfle well eemante�d byv al z a -1 s c D"ax-i-ex'r Shaller streak�l,� ofte'n. I. IMS ma:rking p�artings, dUp vdth� cs�bazzlaacaous; fil appp-,Paximatelf,r 355 0 c and are- sub-paxa-11al to tho bads, I, few Patches Q-A" Mill.7 qaaxtz cvt aerces matrix and. Deb-bles, IL'ni;,te a7�d zal hes 4 c of' yrI tA.,e are alr4c. .p. aaAd �n the -pebbieo� alDssntc, i 2;� SI -11 C, 3 8 41 kltez�natiLg daxk gr�&� hksX-,'t, csX-bCT- eous CILS;jr- ,; C st-loa-3 ae I -a Corer, U-10�), 0 0 C-01-0 Rtsp —th k 2!:, Lne =- 86 10o 384-10, 3851 0G. 011 Sixamination of baud specimens from cores below 10,3851, and th-In sections from '10,Z951 and 10t4001 shows no evidence of matamorphism in thess rOcks� -NO alteration of the original sedimetts has taken pl-ace, and quartz grains shour ao eviience of strain. Delicats Etructures in the plant fragment's have been preserved intact. 61, on Ghert conglowere.te, medium gray. composed of 87 l0,3-85-l0,.S900 vabrovmd to sabangalar pebbles 1116-14 in d-ia- meter (average silicified argillaceouE cementi, Cho -rt is -predominantly Cray, witt, about 30% black- and a few green pabbles. and a few frag- zierats of gra;,Y-ish black sometimes carbonaceous claystone. ��3.artz veinletsp many of which out acrose tbe -oebbles, and a few of which have. mi -n -ate f faalts-, are abun-dant-, rare spinel(?). crystals occur vith the eubadral quartz crystals making up -cart cf' the vefts� Minate patches of pyrite are also T'Xesent' 88 101, 390�100 -110:30 134 011 200' I'llongloa-srate as above, grading rapidlv to %M Sandztcae. 26'in.e to medium grained, very siliceous, 51IGhtl- silty, melium dark grayo non-cal=eouc-e comr,oEed of subround to vu�baagular grains of ar chert; ei:eept for grain sizei, it is very S`Mt-- to the conglomerate 4�escribed. below, 3`01 "'hert com-poted of subangular to subroundede iosll sorted pebbles 1/1611 to 3/413 in diameter. averagiar -4Z. g 1/161i to .11. The coarser sizes aze coacentrat,,:�d in thin irregular beds grading to finer -grained teds above and below-, they d1p 50c. About 20% of the pebbleE are green or gray -green, 25% are blackv, and the rest are. madi-am tc I.-Ight gray chert, 4;.,_-rts ge-rains are rare, and other minerals and rock ftagments are vf,.-&7 r;Ere, ahe grains are ,ightly packed and dej,-,ositi,:��nn of additional chert aad quextz waround the grains has left very litt-le space retweer. gra-ins, this is filled.with fine ouarts silt, 'Zo-arts veinlets are -orsspnt,'and a vew of them continlas across Pebbles, 61a;rstoae, grayish bla.ck, el-Ightly si'6%L,, sligbt4v siliceousp noa-enleareous, non-mi'caceou%; tdk- rniwate dis--Oatinuoas caxbcaaceoas partings., Jxreguaar fractur-es '—�-e Common, most of Which have a shil3y carbonaceous film on the surface-, man,- -n3��,Y slickcatsides� wc-'hort, rLarrow quartz �-einlelfe witm eukiedral, crystals �and scattered f'�Pdrxel 7 enystal s"" --ro -or'-sent" as are small, rare of pyz"Lte� A. di -P of w-600 is 0 I-, to FLecoyj�.a vore Dl)v -� h shown by thin, slightly lighter colored layer.% of siltior material; the bedding is somewn-It irregu:Lar, k--�icrofossilz absent, l0vjW�-10,4121 90 On "laystone as ziboye,. bat slitier and slightly lighter �'daxk grt�y) ia color, Fractures and veinlets are less ammon, Vicro-A-ozoile absea`,,�. Ditch 10,43,2-10,,4331 Dark gray chert conglomerate ia u or !J3 of section, Witb black claystone in lower 2/3, Core . DO-) th ii;Rev�er 90 10,42Z-10,4500 1V G" l7t0"(10('09") 91 10; 450-1 U0, 44601 71 0 A"�6" W01') Pt6d (V 10,4EO-10,4611' Ov Of C14yes-tone, da.-ek gray,, occasionally slightly 5il'vv non--calcareGus,, with stibconchoidall fracture, fZ-,FGments have shiny black carbonac--ous stxfacest often with slickensid-vp- Fartinggs covered ir-th fragmental carbonized olaat remains ars co=on.s and are %bund -ant at 10,4411. An. irregUar bed,; I' thick, of medium gr.V veny fine grained silicsous saad- stone occu-re 10 above the bass of the core; the ton contains a discontiwaous layer of pyrite� Nodules of pyrite to 1`1 In �U a - Meter are preseat, on one or two bedding planen, Between 10,4361 alad 10,4371 is a 76 baad of ailtstone, zlA-gt.,tly lig.liter in color tbzin 'Whe claystone! the claystoae 4mmedilatel,-,, beloit 'It has carbanaceous partings with "ct�;iy bedding, iaddcald7e of contem-poraneous alumpiag, Dip approximately 350, Fragmental plant re- MaiDs from l0yxAlv were identified 1by James lf� Schopf as Fsilo or- no -r., near P. " R Nknt 011 - - - 2ELia�qtos Dawsor,,, . Zo stero (T) SP, Mov', p. C and stimella (?) Sp.; they are 1rp--robabl-,r Miiddla---be-io-nfaz, not younger", and '!possibly could be some -what older," Microfossils absent. claystone P-8 in Core zioove-; barads off ziiit stons iln 'Lousr ,-art as I- the lovez part of Core 88o 1,-,30omLag coarser and less vp-3-11 sortad wd 41h A, t b, Micr:�fasasils absent- 10��462-10,4661 62 00 1�60 (1163) 1111hel-t c=.g,1,0,.-eTatS as -��t bass of Core 91, 316a ii "-1ays40aa as in. Oare 90 above. Ito., ftv!� 'he -1 coaglomerate as abave� absant, Z 5 94 10A69-10o47V 10 Bit 8f? (10611) Chert conglomerate as abo7e� with about IQ�11- of the Debbles as somewhat larger than 10 in diameter. One or tu* of 'the rare VIack claystone pebbles have slight s=face in- dentations, eaused by pressure of smal-I adjacent chert pebbles. 95 10,472-10,4761 29 On 96 10t,476-10,4791 31 01" 97 lOc479-109486') V Off (410") 98 10, 486-10, 4871 11 or, 99 10 u 4e 7- 10 o 500 1 liq on (01211) 214" Chort conglomerate as in cores above, but wii;h some subrounded pebble a 2-410 in dia- mei�er, �Iebbles are nearly equi dimensional, and show no -jarticular orientation., Black' shale pebbles have been pressed against th-3 harder chert pebbles and their edges are ofl;sn alightly curved to conform to the ol-tt- !�..ne of the chert pebbles,* Chort conglomerate as above. Ch---.�rt conglowerate as above. Chort conglomerate as above, Chort cca-glamexate as above; it has a sh-Arp contact with Siltstoaer, slightly sandy, medium dark - Siliceous, argillaceous; the sharp but irregular contact with the under- lj,--.'.ng clwstone dips a-pproximately 400. Clajystoneo dark gray, hard,, with streaks of nodular Pyrite Darallel the bedding planef,, wh�f-.Ch dip about 400, Chort conglomerate as above, M.-'.orofossils abseat, 100 lot5c0-101�5061 50 On Ghort Conglomerate as above, The total dn th of the well is corrected to l0o50-31 from l0o50W� 10-11 1005OZ-1011503 11 06 No penetratiory 11' recovered from Core 100� clu)rt conglomerate as above, FiI 7c- . x e3c-a--R`u---cjje r October 26, 1951 26 "'~ '-. fiGURE 54 tit e ..- 'I ~ LðVi/e ('Þ I..ç; n!JfLk ','. ..:~·~it;.~~~,,~~- i~)' - . -. i,,:{~~¥;;",', . ,;"-.,:,,,,-,' :."":\. ,ISOPACH AND LITHOFACIES MAP.' J-1. ~'.."-:." .- ,:' ".- ~-:,... '.,'::/-,- ". -- ."3..'.: . . .. ':...:_':: .......,'. . - '. Thickness ~and-Shale_ Feet· Meters . Ratio jø-Io<-( At i garu Poi nt-1 750 229 <1/16 IOO-~ South Barrow 3 748 228 n.d.* oo-03"'i ~South Barrow 13 187 57 1/8.4 lOO-C1-t c> South Barrow' 17 503 153 1/3.2 IDÞ-It;¡1 Cape Ha)kett 1 178 54 <1/16 I OtJ-o'I 3 West Dease 1 431 131', 1/8 1ð(J-~'t Drew- Point 1 71 22 1/16 IOU-/OO West Fish Creek 1 252 77 <1/16 1()(>-Io3South Harrison Bay 1 667 203 (1/16 ioo-~ Iko Bay 1 643 196 1/3.9 /()/J-ijOO Ikpikpuk 1 S80 171 1/16 loo-ffl In.igok 1 150 46 <1/16 I 0(>-1 tJtJ North Inigok 1 136 41 1/11.4 100 ""5'5- Kugrua 1 616 188 <1/16 IOO"sc. Kuyanak 1 587 179 1/11.2 , uO -11.{&t Lisburne 1 ,(1) 100 -1S"q South Meade 1 714 218 1/7 IOtJ--~ Pear-d-l··- 205 63 <1/16 100 -/~3 Simpson 1 520 159 <1/16 locH~OI East Simpson 1 282 86 1/16 lDO~ East Simpson 2 87 27 1/8 ¡Db...en South Simpson 1 814 248 <1/16 .! 100 -16;) East Teshekpuk 1 1.038 316 <1/16 IÞO-"S- Topagoruk 1 782 238 1/16 IDb~ Tulageak 1 812 248 1/9.1 IOO-'~~ TUAa1ik 1 140 43 <1/16 (00 -otI.;) Wa lakpa 1 640 195 1/1.7 loo-oCftWa1·akpa 2 613 181 117.7 *n.d~. not detenmined. Unit J-1. which contains the reservoir "Barrow sandstone" in the Barrow area. lies unconformably on TR-3 and is restricted to the northern part. of the NPRA. J-I is Ear1y-Middle(?) Jurassic and coincides with foraminiferal zones F-17 and F-18 (Anderson. Warren.. and Associates. 1974-1979). " The thickness' of J-1 is related to its truncation by the overlying mid-Jurassic and basal "Pebble Shale" unconfonnities. The thickest section penetrated is 1.038 ft (316 m) thick at East Teshekpulc 1; this section extends to the west and parallels the Barrow Arch. Northward. toward the Barrow High and the Barrow Arch, unit J-l is progressively truncated by the basal "Pebble Shale" unconfonaity. In the eastern half of the NPRA. the mid-Jurassic unconformity deeply truncates .1-1 toward the southeast; J-l thickness ranges from 580 ft (177 m) at Ikpikpuk 1 to 136 ftJ4Z II) :at North Inigok 1.. _ ,~...' . In the western half of the ReserVe. t..unèation by the bisal ·Pebble Shale- unconfQnaity' is more gradual. and 140 ft (43 01) of J-l is present at Tunalik-, 1. .~, The-~'rãiél;"Ju.raS$ic unconformity probably truncates J-l '. , c_letel-!_~i". an east-west direction across the !Diddle of the NPRA. -~'<·':~'·:··__7-·_,,-__>_',"·:_~-,:·,:-+;~'-~__._:~:':'~d~.;I...::___..,".__~_/:""_".:: -<_:.:.__....,,- ,_'.:~_ -:.'-< .::_ '_ ",_ ,._ _ . ._,_'" -:;.\ ,~; -:-'T?~ -···Uñ-ft".r.;1-::ë~is~tsts~cif-'-C:ic·hiã+1Y'''.pOdtect :shale--unfts-th8t-coàl"sen--ùpWard,:".- . into:slltstone or sandstone. The only econCllically illlPortant sandstone in , J-1 is the -Barrow sandstone. - The unit becomes increasingly argil1aceous toward the south. away frOll the Barrow area. At South Meade 1.. a "sand-shale ratio of ,.1 to 1 probably denotes the southern limit of any pote~tial reservotr rock in .I-I. ~~. ·~~~.:':':i=5~::::-· .: '= _:::" ._:..~_. :~"_. .~=!~=;;;;:.:::~- ~=_.- ~,~~,:;':;;'~~,~"=--~;,~;,::-=- ~-...;;--:.:=;;;-<., ~~'.'. .J~ I I i ,;1 I --[ --. -I .:1;. .> ~~~ ;'. I .. --, [ I I I I J J ] ] "' _'-'-'.' _'~"'_='-.'c.:..+-.~.:....__"'-. ~.., '-'___ URE SO 4 is� Ati, P N. L LHOF A TR -3b IV, e e So vat. -44 APT" tj ru ter Sdnd-Shal. -0137 '. --Poi I I*"-. 1 `1- - -. -... Ratio 067 SQuth - a' '�:- �'. . - , South Ba S rr 3uth 8 47 C row 17 '14 so- 3.4 7".-'Ifest Do A Is 1.8 ape Hdlkett 0.0 . 19 Or 01 eir p ase,471 24 >118 131 40 f66;-7VP':k- ifes 1.4 t Fish 46 1.6 ./0()-103 'South 14 reek -:1 I 0 8 rrIson- 3 dy j v - - % - ' - Pik s4 IJ 3,9 puk. I' -(99: in, >8 jr- 100- 90k I 111.2 Orth - I � -1, '12 KU grua 1 44 - 6 3.1 icy tydnak 93 13 1.6 L isburne J3Z 28 <118 /CK3 sout 40 I/S. -1)0c Pea h Plea 132 2 de I (?) 40 2 "0& - /43 ' rd 1 122 /C6 - SIRIPSOn I -- 4.8 /66 -101 East S1 -- 216 37 /ca -a,03 East Simpson 1 116 66 1.2: "9-4 South Mpson 2 IS7 3S 1.8 /Ocv,-16a. East isImpson I IS4 48 2.1 0 eshekpuk 1 47 - -TopagOruk I Izg 44 3.o /00 - M5 143 2.3 /00 OWT'Jldgeak I /00- T"d I Ik ISO 39 2. 6 106 'V4 lakpa 117 46 111.3 k4lakpa 88 36 I.Z IZ6 27 Z.O -cat SInClal 147 38 Q/8 'Firco 16i"ville 45 Z. 86 . 11, 1111k itiver 1 46 14 2.3 In not 74 the 23 n.d.* Sandsto "Orthe e. Th"n Part to 36 �"t e u . Of the t (Jim) n1tranges I just South at t r, the South Rest Un 1 TR -3b of and FIsh1n thIcknes fro contains the Sag R, Creek I m 216 ft across the a to the with th th, (66 M) nOrthe "Palle north rn f.. Of fter 8ar ver "Pebb where It the jWpR,4 ve - and row if, e ckest dPPea le Shale- on ap, th - In th Problabi gh* The Unit at PeOrd I i's to unc.... e Barrow 7e 8,,,,, Y is Present de"lOPMent 'whether tFu, r"Y tru 1j'gh- E drea- TR -3b thins toward thIci OlvOrd th "Cates T ast Of Deis thins toward the Unit rR cation�;O'rt q only In the R -36 1 — I onlap e north -3b* Ne e 14let eServe s the a Occurs. -northeast. OF Deas a the basal the 0 The Cleanest* and It e Zalet, 718-3b c ns'nOrthern Sandstone It, strat,g Is Uncertain ,.� Istin Part no Or. raphl or a Cho tip Cles �V. silt RA wh Of u Unit drill b the S, ed sts Y t Of 'Ore. It 1 Og Riv, of )I Oward.. th OVerjapp, S a Sh or Is to date On the fteston, e 49 bar. eetl1kjj restricted to S. 1 At's fO Irest and ThA $and APobab-ly- 4--aft - sout he - . re % ese fscles the B. becojues t Of The-1-1 : i I � - - - Iduco ItIcs, lea, Ce -..-i - � - . - 1 5 UW bes area, South e areaj of Shelly to Drow area I 'Part ly OPR*nt n t� north ftorthw�ste in Overl, bl - I he S In the PPI*i barl, cr�4 -' Is. assoc to the 9 to Peard I ke Of lat north rn e Und located with east and K$Ig NPRA platfo,� ed the F 0 The rud I t 9 at Ish Secn. 0 X U, W are oar or Pfkpuk I reek p la, t form a o f �7: may be an A PeDreSen* Js-orcx� I* Li tho fzi-cieu; /I?c,,p T -)?-3 1. R VAR#OW k"�5O B�ARROW JV9 SCL -ot o 4G IN WEST BASED ON SEISMIC 00 ApHic INTERPRETATION. so 1 *01, 0. 2.4. 71 d) - 90.111APPOIN .167 ... TULA 1(30 00 ALI IMPSON I A! owl + JW 0 BALTON I AK I W.T. FORAN I got CLIFF' POINT A] ULL N. P. —kWLKLTT I D 51 CHUICCH/ SEA PEAR I WA AV/ 200 so IN Ku .. ...... ... JU 3 --- -- -- — ----- - — — — — — — — — — — — — — — — — — — — - KA--4 — — — — — — — — . 9+KE. — — -- — - — — — — — OUMALIOC I — — — — — — — — — — — — — — — - OUMALIK I -y—N.R. XOL.UWTAN -SQUARZI LAKE I N.R. P. I =AT I C16K a it T11 ALM I --I J AWUN I Lem VINCLAM KNIFIESLADE ITLE owe, j 2 jjR,_j TEXACO XAM LK I 71 IAL RESERVOIR AND AVERAGE POROSITY Well Thickness Average Porosity Feet Meters (Percent) '06-10q A�igaru Point 1 90 27 16 100-10( Cape Halkett 1 30 9 15 /00-0q3 W�st Dease 1 83 25 18 /00-m* rew Point 1 85 �6 15 /4V -1W st Fish Creek 1 36 �1 12 /W -1, 63 outh Harrison Bay 1 53 16 15 joO-2ooIkpikpuk 1 31 9 7.3 too-15'57Kugrua 1 107 33 9.6 too -is -4 Kuyanak 1 107 33 16 t6o-h-vSouth Meade 1 66 20 14 /oo-a,x.Peard 1 135 41 8.5 100-A.3 Simpson 1 105 32 18 iao-aw East Simpson 1 141 43 22 160-Q6,3 East Simpson 2 154 47 18 100 -117 -South Simpson 1 143 44 17 /oo-m2East Teshekpuk 1 87 27 10 /6o-&,6-Topagoruk 1 89 27 14 /oo-ov;-Tulageak 1 75 23 18 14O...VgWalakpa 1 61 19 18 /oo-d-g/gWalakpa 2 80 24 16 /W-65(Sinclair Colville 1 43 13 The Sag River Sandstone is the sandstone TR -3b parastratigraphic unit. The rocks Early Jurassic and are.restricted to the Reserve. 19 lithofacies of the are Late Triassic to northern half of the The Sag River Sandstone is a sheetlike sand body that probably consists of a series of overlapping bars. The lithology is typically light -greenish -gray glauconitic calcareous sandstone. The Sag River Sandstone becomes increasingly silty toward the south and west. At Inigok 1 and Tunalik 1, laterally equivalent siltstone and shales are present. The Sag River Sandstone also grades into equivalent calcareous and glauconitic siltstones, shales, and silty sandstones on the Barrow High. Porosity within the unit is very good in wells drilled on the Reserve. The lowest porosity, 7.3 percent, was at Ikpikpuk -1-�--t-he—fti-ghast -pqr.q-$jty, _pqrcent, was -in Ea.st-S-tmpsQn 1. Porosities above 16 percent were recor-d-ee.,-d---i-n---a-'I-*I----w—e-l�l-t--iri the -- no . rthwestern NPRA. A second area of good porosity divelopment. is over the Fish Creek Platform northward to where the unit is truncated by the basal "Pebble Shale" un.tonformity. There were several minor oil shows in the Sag River Sandstone at East Simpson 1 and East Simpson 2. BARROW. SO BARROW /VZp 14 so N. SKULL CLIFF I N.R. !MISSION NNW. 153, 152- ISO - TR -3b ONLAPS BARROW HIGH 4AA I aOTTOA# or 3AG RIVER TRUIVC4 SN4L SON I TE') By 84 r UiVCONFORAfITY (,SEIS m1c) J.W. OALTON I r.j. Fomm Top OF S4G 4. P. . . . . . . N I KALK T SlIALE X. r PT� I 'is my 53 M.N. N. P. .pawl LUKTAK I R. --r— E.49 . . . . . . . . . . . ISOPACH' AND� LITHOFACIM MAP,� T R:- �3aa ........... Wel I S- Thianess, Sand -Shale Clastic': FeWt.. Riters Rati o Ratio /00 At i g a ru, Point I 255 .78 11I.A '8 South Barrow 3 165 50 n -do nod&, Ax-lol Cape Hal kett 1 215 66- 1/1.4 3.1 -aci;) A. W. -Dalton 1 139 43 1/1.2 -0- /06-o43- We Dease 1 67 2t 1/1.2 0 /oo-my Drew Point 1 .510 155 Io2 9 ioo-/co West -.Fish Creek 1 231 70 <1/8 1.8 /oo-io(. We Ti -Foran 1 93 28 1/2.5 14 /co - ic3 South Harrison Bay 1 284 .87 1/10 1/6 /co - t3(, Iko -Say 1 58 18 2.4 13.5 fou _�)co Ikpikpuk 1 480 146 1/7 6.4_�y too - inq Inigok 1 343 105 1/6 18 jao_/c8, North Inigok 1 152+ 46+ nod. nod. jou-(S�s-Kugrua 1 372 113 (1/8 1.9 too, 16-C Kuyanak 1 184 56 1.1 0 /06-,qg Lisburne 1 250(?) 76 1.2 1/1.6 IM-15-tl South Meade 1 238 73 1/9.5 0 /00- goa Peard 1 300 91 5.1 18 jco./&3 Simpson 1 269 82 1/2.4 0 /oo-961 East Simpson 1 431 '131 1/8.3 10 /00-063 East Simpson 2 382 116 0 1/1.1 /00-,9:; South Simpson 1 524 .160 (1/8 23 East Teshekpuk 1 181 55 <1/8 1.6 100-il)6-Topagoruk 1 370 113 <1/8 0 loo. -o9,4 Tulageak 1 67 20 1/1.3 0 /co_ag�6-Tunalik 1 470 143 1.1 5.6 iob-eq,g Walakpa 1 284 87 2.3 8.5 /co-" Walakpa 2 313 95 2.1 7.9 Ikpikpuk 1 (480 ft, or 146 m) and Inigok 1 (343 ft, or 15 m) in the Ikpikpuk Basin. East of the Dease Inlet, the basal "Pebble Shale" unconformity truncates TR -3a. The truncation zone runs roughly east -west and is just north of J. W. Dalton 1 and W. T. Foran 1. West of Dease Inlet, the unit onlaps the Barrow High. Thicknesses of TR -3a at East Teshekpuk I and West Fish Creek 1 indicate thinning over the Fish Creek Platform. Thinning also is apparent on the flanks of the Meade Arch, as indicated at South Meade 1 and Kugrua 1. In the western half of the Reserve, the unit is thickest at Tunalik 1 and thins northeastward toward the Barrow High. Lithology and high gamma -ray curve deflections within TR -3a suggest that the thinning may be due to periodic nondeposition. The TR -3a unit consists of calcareous carbonaceous shales and siltstones, silty limestones, and silty calcareous sandstones. Glauconite is a common accessory mineral in the sandstones, and thin shell beds occur throughout the interval. Sand -shale ratios and clastic ratios indicate that the best sand development is in the northwestern part of the Reserve. High sand -shale ratios at Peard 1, Walakpa -1, Walakpa 2, and Iko Bay 1 indicate a source area northwest of the present shoreline. TR -3a is progressively more argillaceous toward the southeast and more calcareous toward the south. Over the Fish Creek Platform, the amount of limestone present increases significantly. At South Harrison Bay 1, the unit is mostly limestone. At Lisburne 1, with no nearby control, arenaceous limestone is indicated. Apparent lithologic, anoma,lies occur at East Simpson 2 where the unit is interbedded siltstone and limestone and Drew Point 1 where the high sand count may be caused by statistical variations, or may indi.cate a small barlike body flanking the Barrow High. A&-, ONLAP ONTO BARROW HIGH (LOGS) 7-9— StAoppow, T BASED ON SEISMIC -Te i7r-, 7e -,.-h r i n, so BA Z; 'RPRETATION. 30-s so BANNOV; ,3,_6w TU� W EAS Fi -0- 1671-00 - AN AgXPA. PEBBLE + AM Y 1 1.2 SH4�4e,, DALTON I V" + + + +,Do IN OA1 0 W -put" I T. FORAW I SKULL CLIFF 1. 64j 'Pool CHUKCHI SEA ....... ....... ------- ....... PEIRD 3 WAIA,wRIcHr 1/8,0 ---- Jvamu PT pq X GSIUA so 7-9. 400 - --------- - - - - - - - - - - UNALIK -------- - - - ------- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - --- ------ - - - - - - - - - - - - - - - - - - - - - -- - - - IGQK 1 - - - - - - - - - - - - - -- N.R AOLAK I OUVALIK I N. It. OUMALIX I N.R I LUKTAK I ;;_� 110 - SQUARE LAKE I N R, UNKAT I WOLF CRk9IL2 N R� I L i �.,-ICLAIR i ITTLE TWdT I KNIFF9LADE AWU I �_L-02.ZA w TEXACO KU XURUPA /=_1_07 0-/ 8epoka �_ FIGURE 72 1 TYPE LOG OF UNCONFORMITY,BETWEEN SAG RIVER SANDSTONE AND KINGAK FORMATIUNi SOUTH MEADE 1. WALAKPA 1, AND WEST DEASE 1 This, figure shows representative sections of the Sag River Sandstone at South Meade 1, Walakpa 1, and West Dease 1. In this report, the top of the Sag River Sandstone is chosen at a prominent gamma -ray and resistivity deflection that can be recognized regionally. These sections show that the log character of the Sag River Sandstone is fairly consistent in the Ivicinity of the Meade Arch, while the overlying rocks are variable. The uBarrow sandstone" and Saq River Sandstone are separated by a shale and siltstone unit. I k A A VAN NO T SLOPE N RALIZED SUBSURFACE u 0 N 0 U) w 2 Lj u 0 N 0 w _j BIOSTRATI GRAPH I C CORRELATION CHART(12/80) MODIFIED FROM ANDERSON, WARREN* AND ASSOCIATES, INC. C sygr 2A STAGE GENE AUZO GROUPS, FORMATIM WA'S NA..;TjF EPE A. W. A. 'NOFLAGIELLATE A.W.A. $POPE -POLLEN OENCRALIZI 810STRATMA ERA PCIUCID F-02 L AND MEMBERS IM FORAjj!jERA!' CYST ZONULES ZONULE3 PHIC UMIT� "I SANTONIAN HOLD- P-13 P -M21 F-16 P_T2I F- 17 QUATE* CENE P-11423 PRINCE CR99K ru.. F -I P -M24 PLEIST_ OCEME sualIc FM. MARY ITAK NOR TURONIAN U 99ASCIE Pm. F.- PLIO_ P 0 N T CINOMANIAN CINE P P_ T9 F-2 0 ' ALWAN z TOROK FM. OLIGO- ol"" APTIAN w u T I SASAVANIRKTOK FM. 2AAR9MIAK A N P A' F-3 0 SOCEIR P-Mll C L I La 9 PEBBLE SHALEe I_g ��g F-4 P -TIO 0 A III P MI. 4 1 u 0 N 0 U) w 2 Lj u 0 N 0 w _j XIMMERIOVAN OXFORDIAN KINGAK FORMATION I -L P -M Is uAISTRICHIMN C CNIF PRINCE CRICK Phl. MCI 'X P"' XAWVIAN F-9 P -MIT _F WORROWAN F-11 P -M If P-4 41 CAMPANIAN V F-02 L 0 P -M 19 F-13 SCHMA09H ONWIFFF P <W "I SANTONIAN L, L P-13 P -M21 F-16 P_T2I F- 17 if A: CONIACIAN P-11423 PRINCE CR99K ru.. P -M24 ITAK NOR TURONIAN U 99ASCIE Pm. F.- P CINOMANIAN P P_ T9 MANUSNUX GROUP ALWAN TOROK FM. APTIAN 0 2AAR9MIAK 9 0 HAUTERIVIAN M;.MA-RjAYZONI C PEBBLE SHALEe VALANGINIAN A III SCRRIASIAN XIMMERIOVAN OXFORDIAN KINGAK FORMATION I -L P -M Is ::,:�LELWMARDIAN 14 4__-.Lr%.AMPIAN F 4 La__ XAWVIAN VLATC 4 RIVER I ;E SHUBLIX FM. F_ 19 IV13HAK FM. r F-20 ECHOOKA FM. P -T P-Mis :E 11 F -S, P-TIZ P -M14 F-9 P -M Is F-7 ATOKAN -TIT P -MIG F-9 P -MIT _F WORROWAN F-11 P -M If P-4 41 MA - - - - - LIMESTONE F-02 L LOWIR P -M 19 F-13 LIMY UNIT P -Mao F- 14 M 901AMECIAN P-13 P -M21 F-16 P_T2I F- 17 P-MI2 P-11423 F-19 P -M24 - JAI�__ WANOO ATOKAN -TIT LIMESTONE P -T of UPPER LIM43TM UNIT WL&'jrnIVf `-ALAPAN WORROWAN C"CSTERIAN MA - - - - - LIMESTONE P -T20 LOWIR NO DfAGM 0 $TIC LIMY UNIT P M 901AMECIAN I ? ITKILYARIAK FORMATION P_T2I C 9 YAK SMALc m IV OSAGEAN A 111NDERNOOKIAN EVON I IAM F-21 MAMET'S ZONES at+ d "m gm kro P -T to P -T Is -TIT P -T of P-TjS MA P -T20 NO DfAGM 0 $TIC Sri C I ES) P_T2I m B P_TZ2 TETRA T—ECH REPORT NO. 8200 iri iu",F 's; , -;--J. \/ T i - cc w > æ Y- o::i u _I ~g \ / ;' ~ , « a. ~ « -J « ~ - « a. ~ « -J « ~ - ~ :J « z :::I r- 'V - ~ « lLI C) « -J :::I r- *~ :::I a:: o ø « a. o r- - ~ :::I a. ~ lLI :r If) ~ ¡J - Z o If) a. :IE iñ vi (\J z o If) a. ~ V> !.J - z o (/ a. ~ (/} LJ * - z fïS a. ~ (/ - lLI lLI ID « lLI en - a a:: « lLI a. * ~ :::¡ « ~ :::I o - lLI a « lLI ~ (/} - lLI Z a:: :::I ID CI) -J - ~ « z )! :::I ~ - « :::I II:: C> :::I ~ - ~ ~ ~ :::I -J o :\!: - ~ 0.. ~ :J « ~ :Z - ~ o C) z Z - :.:: o ø ~ - ~ :::I a. ~ ii: ~ - ~ ID o ~ z o CJ) ä: a:: «- ~~ CJ)ID - z « a:: o u.. ~ ~ - ~ lLI lLI a:: u :r CJ) ¡¡: ~ - r- ~ o a.. ~ lLI ~ S lLI ' en « lLI a ~ - z ~ « a ~ -oj ~ lLI ~ :r ~ u \ / 'i 1:: ~ o a:: a:: « ID vi r-t \/ I") ~ o a:: a:: « ID CJ) \l \4/' *1") ~ o a:: a:: « III vi - « z :::I ~ « - !i: :::I a:: « ø ~ FORAMINIFERA ZONULES a MAMET'S CAR- BONIFEROUS ZONES. ~1' N.1' NP NP N.P NP N1' N." NP N1' NP NP NP N.P No o NP NP N1' No NP NP NP N.? N? NP NP ~P 80 ~P t J. NP N.P NP N.P NP NP N P 1 F- ~ ~ [J"..,c N.P N.? N,? N.1' N.P. N.? N.P. No N.P N.P. N.? N.P. N.P No P 1· NP ~.P. N r NP NF NP NP N1' No NP N.P. N.P No NP N.P. N1' NP N.P. F- 2 N.P N.P. N.P. N.? N.? N.? N.P. N1' NP N.P. N.P. NP NP P , NP. N.P N.P N.P. N.? N.? N.? N.? N? 80 N.? NP NP NP N.? N.P NP 790 N.? NP N.? N.P N.P 533 N.? 2320 N.? N.? N.P N.? NP 830? P N i ¡ + I I t I i NP N.P N.? N.P N.P N.? N,P NP N.? No NP N? NP N.P ~ I I N.? N? N.P --- N? N.? N.? N ? N.? NP N? P N 3040 N.P N.? N.P. N? N.P. 050 I NP 4480 N.P. N.P. N.P. N.P. N.P. 540 I N P N.? 5820 N.P. N.P. N.? N.P. N.P. 940 I 6620 t I 90 t ?90 05 N.P. 2100 o I 5 N.? i N.P. I -L I ~ ~ I . , I 2640 I NP N.P NP NP N? N P I ~t· eo r:;--. 11001 NP 13401 N.P _1 2030 NP NP NP N.P N.P. N? NP N.P N.P N.P NP NP. N.P. N.? N.P. N.? N.? N.? F-3 N? 20 I ? N.P. N.? N.P N.P 500 N.P. N.P N.? 210 N? N.? N.? N.? N.? N? F-4 I N.? N.? N.? N.? 500 010 N.P. N.P. NP N.P 510 N.P. N.P. N.? N.P. 530 F-5 Poor Marine) N.P. N.P N.P 950 580 I 500 40 N.P 050 I 00 I I N? N.P N? N? 980 F-5 N? o II N.P N.P. 2090 2450 220 I 350 N.? 950 I 2190 N? N.? N.P. N.P. 2300 F-51o F-6 N? 560 N.? N.P. 2330 2840 550 I 620 N.? 2160 2440 N.? N.P N.P. N.? 2630 F-6 00 I N? N.? NP NP N.? NP NP. 590 I 490 I N.P N.? 2880 3410 3650 2090 040 N.? 2550 2940 N.P. N.P. N.P. N.? 3080 F-7 1I 460 N.?. N.? N? N.P N.P N.Þ t N? N.? 2450 ? 2040? 2090 100 I -----j . 160 I ~ . 740 . N.? 80 o 1 32 o I 25 1610' N? 100 2730 2820 3340 3610 N.P. NP N.? N.? 3410 F-8 670 N.P. 115 I 90 E.er.t. . 10669 95 00 I 00 o 2570 2220 3400 ~4fJô'~ /¿.:¿¿.-:' 5700 2360 I 3330 t 3770 5000 2630 t '¥ 760 I N.P. 200 ~mß~ ?1397 N.P. N.P 3530 t F-9 I -1- J 5950 540 N.P N.? 3 560 4800 5700 2640 960 I N.P. 2340 o I 26 740 I 990 2760 3420 4265 3520 3485 2860 690 3600? ~ ~ 6800 00 I F-IO m 060 I 900 7350 980 I 6930fI!4~0?1 ;(T,~Ô~ 6743 /. . 7650 2230 690 I 0620 2800 I 2490 90 I 8 2560 2037 ~ )7,/ 2064/. I N.P. 7042 N.? 3780 - 6340 f /6 520~ ~ I NP I 3~!O 3540 N.P. 10 I 4 O? I I 4 3360 30 I 2980 o I 41 N.R 80 I 5 5130 80 I 5 ~ 5260 5950 4800 4740 850 I 4740 000 5310 ~ 8749 5630 I I F- 6340 6420 ';~ 5303 N tacom. 13100 . 6240 6540, ~. 6720 6500 6.1.Q9 6760 2200 - N.P. N.? NR 1970 7490 9060 7240 7'Trn /.7~~0 520 I I N.P I 7380 ~~~ 5'iÓ% / .LL. N.? 7250 6740 2930 7320 7380 "777'7; ~. 77T7; /7510' /7620' d/. /.:;¿¿ N? N.P 450 I 740 t ? ? N.R. 7282 F-12 toF-I~ F-12 N.P. N? 5671' '?N.R 0992 Jur - E Cftl ?6100 I N.R 1..P 7790 9480 1490 950 I N.? NP N. P N? no I E.Cref Jur. ?16 Z 4 T ? N.R NP F-13 F_14IF-13 to F-14 ?N.? 8~ ~ '010; 8910 iI... N.P Z080 3380 + 3590 N.? 705Z 006TI N.? NP N.P. ?N.P. N.R N.P. N.R. N.? N.R N.? N.P. 0260 t- 1006 I 8100 -+- -±- 8190 7Z70 I N.P. N.P ± 7870 N.P. N.? I N.? N.P N.? L, Jur. ? 2080 N.R N.? F-15 ;2370 I N.P. Prob. Jur , 8104 7200 N.? N_P N.P N.? N.R. 7Z43 7830 7920 N.R. 6970 7960 NP ¡ riP ? -::-~t--:: ~~4J NP IN? I NP. ~_~+-~: i NP I + N? r:-~ N.P I NP I rI P ¡ rI? -+--r N piN? i -t N; -I I N.? I I----t I N P . I 5165 ~.H' N.R. ~ f ~......:..... N.R, N.R . 8890 , I N.R 9570 I \I 7360 N.? N.P N.P. N.P N.? t ., %IOOW 3~f ., ? 4fO 2f9 75,30 -!- i .L 8370 /8520' f -;;- 7480' N.? N.P. N.P N.R. N.R. 7fo N.? ?6600 6620 ..- ';:'6740 6900 ?5684? N.R T 9280 /8400 N.R 3087 N? 3560 ? ., /9;00/j ? ? N.R. N.R 8520 ~/ 0080 3990 3363 42&1 1 o 1 37 8670 7660 6705 716!) ?63041 6.346' N.R. 8532 NR 9930 1 ~-~ r ~40 . ., 5330 t 8tO' 670 t I 9fO 2000 t 8230 t ., ë9i'ò N.? 89:0 I N.? NP N.? N.? 7630 t N.? I a 20 2080' '" . 1 9330 95Z0' NR N.P. NP 1 ;;- '~9'2'10/' /. 6905 N.P I 5310 N R NR N? N.P 9600 ......,.,., 9910' N.P ? .6956 3360 N? 7780 f'Hó T 1.1.-E. Jur. !O ~ ? ¡I Jur. , 1638 N.R. N.? F-16 l ? N.R. f ? -rrrr 82.5.0/. F-17 E. Jur. ? 1999 N.R. F-18 ? .J1r. N.R F-18 to F-19 6370 9700 NR NR 0100 I 2210 I o I I o I 2448 8970 7590 I 9Z70 6977 0270 N.P. N.P. N.P. N.? . ?9~16 I N.P. ? ? ? ? N.R. N.? N.R N.? N.P. N.P. N.R , N.R N.R. N.P. : 0390 I N.P ¡; 9240 N.? 9510 NP 0350 N.? N.P. 4810 1 N.? ~::.~~~m '9816 9000 ~ Carb- ' Ptrm. ? 8 590 N.P. N.? 7460 ? N.R 8730 N.R 9170 HIO t NP 9970 N.R NR N.R NR N.R N.R 2480 3990 0570 N.P 9360 7650 9660 7554 520 I ? N.? N? 7135.5 N.P 9655 N.P N.P. N.R N.? '~.R N.? N? 30 I I I 390 II N.? o I 02 N.P N.? N.? 580 II N.? N.P 9050 I N.P. 9680 N.P N.? N.P N.P. NR. N.? N.R. N.? NP N.P. 600 I I NR N.R N R 50 I 4 I 830 I I N.P. 0275 N.P. 0470 I N.P 2060 I N.P. N.? 9550 N.? 9930 N.? N.? N.? N.? N.R. N? N.R N.P NP N.P 2380 I NR N.R NR 4740 2480 I N.P. 0720 I 8200 0620 N.P. 2400 1 N.? N.P. N.R. N.P. 10286 N.P. N.P. N.P N.? N.R. N.? N.R N.P N.? N.? '?N.R N.R N.R N.R 5215 2930 I N.? 10 1 1 I 8'00 0950 N.P 2840 I N.P. N.? N.R N.? 0440 1 N.P. N.P. N.P N.? N.R. N.? N.R. N.P N? N? N.R NR N.R N.R 5740 I 3480 I N.P. N.R. N.P 00 I I N.? 3230 I N.P. N.P. N.R. N.P. N.P. N.? N.P N.P. N.? N.R. N.? N.R N.F N.? N.? NR N.R. N.R N.R 6220 I 3760 I N.P N.R N.? 60 I I I N? o I 35 I N.? N.P N.R. N.? ?10620 N.P ? 7460 N.P N.? N.R. N? N.R NP' . 7390 1- L M;ss ?8Z20 NP NR N.R N.R N.R LMi3t. ?16490 L. Mil'. ?14000 N.? N.R. N? N.? N.? N.P. 4950 5310 N.? N.? I I N.R. N.R. N.? 4290 4360 N.P. N.? N.P. 3620? 3666 N.? N.? N.R. N.R. 20335 N.P N.? N.P. 3950 4015 N.P. N.? ?N.? N.R. 0503 N.R. N.R. N.R. N.R. 0664 N.P. N? I N.? 1740 8795 N.R NR. N.R. 7505 N.? N? N.R. N.? 7&20 7739 NP. N? N.P. ?N.P. 1002 NR NR N.R N.R. II NR NR NR N R N ~ ....,.. N R ,,11 N Q NR NR N.R Mill. '14850 T 56 I N.? 9630 0225 N.P. N.P. N.R N.R 1172 -J N.R. N.R. I r(//"~ i/~; ;)%~ NR. 9945 u .. , /// // ...... ~~~ ~i ~.-" ~>/ N.P N.? N.R N.R 7000 I NP . 6 580 6690 N. 2588 NR I ~a2 I 1"39 ~1 017 I 20102 N.? 5400 548 1 I I N.P. N.R. 273 N.R. 290 N.R I 1 8770 8864 N.R. 4Z7 1 I N.P. 7830 7946 3732 / % 4170 7730 7930 ZI70 N.R. 8310 F-19 N? N.P N.P. N.? N.R. N.P. F-20 to F-19 7880 60 I 8 N.P. N.? ~?~~~)~ N.R. 8580 F-20 N.? N.P. N.? N.? N.? N.R 9490 I F-2 7 I 83 N.? N.? N.P. N.P. N.R. 9550 + I 2.-2 8560 88Z0 N? N.P. N.P. N.R. 9910 l.-2 8980 9160 9020 N.? N.? N.P. N.R. 0270 i!:.-20 60 I 9 N.? N.P N.P. N.R. 0460 I to i!:.19 2.18 . N.P. N.P N.P. KR. ! N.? N.P N.P. N.P. N.1l 0640 I l.l7 to l.18 Dolomite Unit i!:.-16 L Miss '9320 N.? N.P. N.P. ? N.? N? N.? N.P. ? ? to l.15 Older 2.14 2.13 or N.? 9Z50 9367 N.? 9779 9900 N.? Z344 2536 N.? 2460 2890 Devonian? te i I I Aroi !'~'}.;...:" "..._:....~ e e "Old" Na\.")' \';ells (1944-S3) well Name Avak -, 10ö-08--:¡- South Barrow-l /()O -083 South Barrow- 2 I ()D -of)i..{ 1 I Sôuth -Barrow-3 laD ~o~ ! South Barrow-4 /(:> 0rD<9' \ Fish Creek-l I DO -1tR> I GJrandstand-l 100 -4>5"3 I Gubik-l Ibb-.g:), I I Gubik-2 I DO -:;):J ~ . Kaolak-l 100 -t:)~ Knifeblade-l )(JO - Ii) / YJ1ifeblade-2 I OD - ~9 Knifeblade-2A ì:S. ~~t J<'''iPe.Jota.òe 6- z.1eaåe-l OUmalik-l 10D-/l"{ \ Eas-t Ou.'nalik-l /00r"6- Simpson-l Il)Ò-/Go~ NlJiI"'fh S/",p~t:I,.,-1 l()D"ol'fr Squ~re Lake-l J 00 -,} (,.. Titaluk-l 10b-If)Ö 1 Topagoruk-l ¡DO -tqt Ea~t Topagoruk-l I -l~ 6- Umiat-1 IDO -Qeo, I ·1 i I .. IOo-Q.ID (oo-(}.( I Umiat-4 100 ,81::J , Umiat-5 IDD -913 I -- ! Umiat-6 100 -é}.lq¡ Umiat-7 I(;)Ó -ê/~-r I Umiat-8 lOP -~/(P I Umiat-9 Jó ö -Q/1- J Umiat-10 IDD-é)I1f Umiat-l,1 IDO ...é)/1 \. Wolf Creek-l Iöö-J11~ Wolf Creek-2 IVO-:1It?5 j Wolf Creek-3 1(1)-IIG) .-..--.-..' ...._.' -.--.---- ..~..~_._..._...~.~ >,..--." .--.---...--....-.. Umiat-2 Umiat-3 ~ 1 t , ~ ! . "Intermediate" Wells at Barrow. (1955-1974) , . South Barrow-S IDO -bd.t$ South Barrow-6 , (J() - öclo., ., South Barrow-7 16D;-o3D South Barrow-8 /06!-031 South Barrow-9 IDö-(:ß;J. South Barrow-10 Id:>-033 South Barro...·-ll I($> -ó'3~ ~ south Barrow-12 /óO""b~ ! t ~ . a .. __. ..___.__...__.._. ._n.+__ ._ __.__..._~_._~..~.__ J.t6