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159-012
From:Davies, Stephen F (OGC) To:Price, Jeremy M (OGC); McLellan, Bryan J (OGC); Wallace, Chris D (OGC) Subject:RE: Iniskin wells Date:Tuesday, April 5, 2022 8:45:19 PM Jeremy, Chris, and Bryan: From roughly 1995 to 2000, Blair Wondzell (AOGCC drilling engineer) and Steve McMains (Stat Tech) and Wendy Mahan (Natural Resources Tech) undertook a project to review the condition of Alaska’s wells. Blair, Steve and Wendy didn’t actually visit any well sites to my knowledge, they just used AOGCC’s well files to judge the condition of the wells and assign them to the location clearance categories that we now show in RBDMS. Nine wells have been drilled on the Iniskin Peninsula, as shown on this base map. To get a sense of scale, each of the squares is about 1 mile in width and height. AOGCC has very little information for six of these wells that were drilled in the very early 1900s. 1. Alaska Petroleum Company No. 1 00, PTD 100-126: Drilled to a depth of 1,000’ and P&A’d between 1902 and 1903. We have no additional records for this well other than the general location, depth, and spud and P&A dates. The source of that information is unknown. This well and the No. 3 well were both drilled in the same governmental section (Section 11, T6S, R24W, SM). Since no more specific footages from section lines are known for either well, both wells are spotted at the center of Section 11 on the map above. 2. Alaska Petroleum Company No. 2, PTD 100-127: Drilled to a depth of 450‘ and P&A’d in 1904. We have no additional records for this well other than the general location, depth, and spud and P&A dates. The source of that information is unknown. 3. Alaska Petroleum Company No. 3, PTD 100-128: Drilled to a depth of 930‘ and P&A’d in 1904. We have no additional records for this well other than the general location, depth, and spud and P&A dates. The source of that information is unknown. 4. Alaska Petroleum Company No. 4, PTD 100-129: Drilled to an unknown depth and P&A’d in 1905. We have no additional records for this well other than the general location and spud and P&A dates. The source of that information is unknown. 5. Alaska Oil Company’s Dry Bay No. 1, PTD 100-130: Drilled to a depth of 320’ and P&A’d in 1902. We have no additional records for this well other than the general location, depth, and spud and P&A dates. The source of that information is unknown. 6. Alaska Oil Company’s Dry Bay No. 2, PTD 100-130: Drilled to an unknown depth and P&A’d in 1903. We have no additional records for this well other than the general location, depth, and spud and P&A dates. The source of that information is unknown. Surface plugging and site inspection for the three more recently drilled wells on the peninsula was approved by the same US Geological Survey Regional Oil and Gas Supervisor in August of 1964. Iniskin Bay Association 1, PTD 100-132: Drilled to a depth of 8,775’ and suspended between 1936 and 1939. The report “Casing cut off at ground level, placed 5 sack cement plug at surface and installed regulation abandonment marker. Removed derrick and equipment and cleaned and leveled immediate well site. All work completed and inspected July 31, 1964.” was approved by the Regional Oil and Gas Supervisor for the US Geological Survey. Iniskin Beal 1, PTD 100-133: Drilled to a depth of 9,746’ and suspended between 1954 and 1955. The report “Placed a 3 sack cement plug at surface, replaced tubing bonnet and bull plugged all outlets. Installed abandonment marker, removed derrick and equipment and backfilled and leveled location. All work completed and inspected July 31, 1964.” was approved by the Regional Oil and Gas Supervisor for the US Geological Survey. Iniskin Unit Zappa 1, PTD 159-012: Drilled to a depth of 11,231’ and suspended between 1958 and 1959. The report “Removed rig and placed cement surface plug and regulation abandonment marker. Back filled cellar, leveled and cleaned up location. All work completed and inspected July 31, 1964.” was approved by the Regional Oil and Gas Supervisor for the US Geological Survey. Please let me know if I can help further. I’ll check with BLM to see if they have any records for these wells that we can copy and add to AOGCC’s files. Thanks and be well, Steve CONFIDENTIALITY NOTICE: This e-mail message, including any attachments, contains information from the Alaska Oil and Gas Conservation Commission (AOGCC), State of Alaska and is for the sole use of the intended recipient(s). It may contain confidential and/or privileged information. The unauthorized review, use or disclosure of such information may violate state or federal law. If you are an unintended recipient of this e-mail, please delete it, without first saving or forwarding it, and, so that the AOGCC is aware of the mistake in sending it to you, contact Steve Davies at 907- 793-1224 or steve.davies@alaska.gov. From: Price, Jeremy M (OGC) Sent: Tuesday, April 5, 2022 1:31 PM To: McLellan, Bryan J (OGC) <bryan.mclellan@alaska.gov>; Davies, Stephen F (OGC) <steve.davies@alaska.gov>; Wallace, Chris D (OGC) <chris.wallace@alaska.gov> Subject: Iniskin wells DEC was asking about these Iniskin wells. There are a bunch of old rusting barrels at the site, not sure which specific well. Looks like USGS signed off on the abandonment in the 1960’s and AOGCC provided site clearance in 1995. I can’t tell yet if there were any actual site visits made by AOGCC or if staff was relying on some other documentation in granting site clearance? 159-012 - Laserfiche WebLink (state.ak.us) 100-132 - Laserfiche WebLink (state.ak.us) 100-133 - Laserfiche WebLink (state.ak.us) IRII 8122 Bureau of Mines Report of lnvestigations/1976 Oil and Gas Seeps in Alaska Alaska Peninsula, W estem Gulf of Alaska UNITED STATES DEPARTMENT OF THE INTERIOR Report of Investigations 8122 Oil and Gas Seeps in Alaska Alaska Peninsula, W estem Gull of Alaska By Donald P. Blasko, Alaska Field Operation Center, Anchorage. Alaska UNITED STATES DEPARTMENT OF THE INTERIOR Thomas S. Kleppe, Secretary BUREAU OF MINES Thomas V. Falkie, Director This publ icatio n has been ca taloged as fol lows: Bl asko, Donal d P Oil and gas s eeps in Alaska. A la s k a Peninsula , western Gulf of Alaska. [Washington] U.S. Bureau of Mines [19761 78 p. il l us ., t a b l es. (U.S. Bureau o f Mi nes. Repo rt o f in vcsti· J:ations 8122) J. Secpa~e-Alaska Peninsula. 2. Petroleum pollution of wacer- Alaska Peninsula. 3. Wacer-Pollucion-Alaska P eninsula. [. U.S. Bureau of Min e s. JI . Title. (Series) T N23.U7 n o. 812 2 622 .06173 U.S. Dept. of the Int. Library CONTENTS Abstract................................................................. 1 Introduction................................................ . . . . . . • . • . . • . 1 Sampling procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Analytical procedures.................................................... 2 Iniskin Peninsula area............ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Well Creek, Bowser Creek, and Oil Bay............................... 5 Brown Creek and Dry Bay ............................................. 22 Iniskin camp area ................................................... 27 Becharof Lake a rea....................................................... 37 Becharof Lake-Kejulik River......................................... 41 Oil Creek-Puale Bay................................................. 41 Rex Creek-Puale ·Bay................................................. 59 Bear Creek-Becharof Lake........ . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . . . . . . . 59 Sal mon Creek-Becharof Lake ........................................... 59 Demi an Hills........................................................ 59 Gas Roe ks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 Observations...... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . 77 Appendix.--Method of determining amount of oil in water .................. 78 ILLUS TRA TIO NS 1. lniskin Peninsula , Alaska ..................... , ..•. ,................ 4 2 . Oil, gas, and water sampling locations on thG Iniskin Peninsula..... 6 3. Well Creek samp ling locations....................................... 21 4. Bear Creek anticline sampling locations............................. 38 5. Kejulik River gas sampling locations................................ 39 6. Cape Kekurnoi sampling locations ..................•........•........ 40 7. Demian Hills sampling locations ...........•..•...•.................. 58 8. Gas Rocks........................................................... 76 TABLES 1. Wells drilled on Iniskin Peninsula.................................. 5 2. Ana lysis of water from Bowser Creek well............................ 8 3. Analysis of gas from Bowser Creek well .............................. 9 4 . Analyses of water from Well Creek •............•.•................... 10 5 . Analyses of water from Bowser Creek................................. 15 6. Analyses of water from Oil Bay ...... ,............................... 19 7. Analyses of water from Brown Creek .................................. 23 8. Analyses of water from Iniskin camp seep area ....................... 28 9. Wells drilled in Becharof Lake-Puale Bay area ....................•.. 37 10. Analysis of gas from East Fork, Kejulik River ...............•....... 42 11 . Analysis of water from gas seep on Eas t Fork, Kejulik River ......... 43 12. Analysis of water from Kejulik River •............................... 44 13 . Analyses of water from Cape Kekurnoi a rea ........•.................. 45 14. Analysis of gas from Oil Creek seep A............................... 49 15. Analysis of oil from Oil Creek seep A .............•................. 50 16. Analysis of water from Oil Creek seep A ..........•....•.....•....... 51 ii TABLES--Continued 17. Analysis of oi l from Oil Creek seep B .....•...•.•••.•......•........ 52 18. Analysis of water from Oil Creek seep B ......................•...... 53 19. Analyses of water from Oil Creek .................•.•......•......... 54 20. Analyses of oil from Oil Creek bitumen.............................. 56 21. Analyses of water from Rex Creek.................................... 60 22 . Analysis of gas from Bear Creek gas seep............................ 62 23. Analyses of water from Bear Creek oil seep .............•............ 63 24. Analysis of oil from Bear Creek oil seep ............................ 65 25 . Analysis of water from Bear Creek ................................... 66 26. Analysis of gas from Salmon Creek gas seep ............•............. 67 27 . Analysis of water from Salmon Creek gas seep ......•...•............. 68 28 . Wells drilled in Demian Hills area .................................. 69 29. Analyses of water from Demian Hills area............................ 70 30. Analysis of gas from Demian Hills area ................•............. 74 31. Analysis of gas from Gas Rocks seep .......................•......... 75 OIL AND GAS SEEPS IN ALASKA Alaska Peninsula, Western Gulf of Alaska by Donald P, Blasko 1 ABSTRACT The Bureau of Mines investigated two areas of the Alaska Peninsula (Iniskin Peninsula and Becharof Lake) where oil and gas seeps were known to occur in an attempt to determine (1) whether the seeps are still active and (2) the amount of bitumen contained in the drainage leaving the seeps. The oil, water, oil-water, and gas were sampled and analyzed. Five oil samples were taken at four separate oil seeps. The API gravity of the oil ranged from 8.9° to 21.4° and the sulfur content was from 0.12 percent to 0.59 percent. Four of the seven gas samples obtained revealed fairly high caloric values, ranging from 746 to 924 Btu/cu ft, and averaging 844 Btu/cu ft. A total of 44 water samples were obtained. Bitumen content of the water was as high as 9,773 mg/l at one seep, but averaged less than 1 mg/l where the seep-drainage water entered the Gulf of Alaska. INTRODUCTION As part of an ongoing program in mineral resource and environmental evalu- ation, the Federal Bureau of Mines conducted field investigations during June, July, and August of 1973 and 1974 around the Gulf of Alaska. The investiga - tions were aimed at locating and sampling oil and gas seeps to establish the occurrences, document the locations, and sample and analyze the seep oil and gas . This report deals with investigations conducted by the Bureau of Mines on oil and gas seeps on the Alaska Peninsula (1) in the Iniskin Peninsula area and (2) in the Becharof Lake area from Puale Bay south to Wide Bay and west to the Ugashik Lakes. Similar investigations of oil and gas seeps are being con- ducted between the Copper River and Yakutat in the north -central Gulf of Alaska and will be published in a separate report. lPetroleum engineer. 2 SAMPLING PROCEDURES At each seep, an attempt was made to obtain enough of a sample of the oil at the site to perform a routine distillation analysis. Failing this, an oil- water sample was obtained. Regardless of whether oil or oil-water was obtained, additional samples of water were obtained at intervals in the drain - age of the seep. These samples were then analyzed routinely for cation- anion qualities. In addition, values were obtained for total dissolved solids and pH. Of prime interest was the value for the oil content of the water, expressed in milligrams per liter. When a seep was located, the sampling procedure was to locate the mouth of the drainage stream and take the first water sample from the mouth of the creek. Then, two to five additional water samples were obtained upstream from the mouth of the creek at various intervals, depending on the length of drain- age between the seep and the mouth. Normally, a sample of drainage water was obtained in agitated or freely flowing current, and another was taken in a calm, standing pool . The seep fluid was then sampled. If possible, enough free oil was skimmed off the top to constitute an oil sample for analysis. If it appeared that insufficient oil was present for a free-oil sample, an oil- water sample was taken. The last sample taken would be upstream of the seep area, far enough removed to be out of the influence of the seep . The purpose of sampling from the mouth of the creek upstream to the seep, rather than sampling the seep first and progressing downstream, was to insure that repre- sentative samples were obtained. Sampling the seep first would agitate the collected bitumen in the seep area; this would allow additional bitumen to flow into the drainage, which would not normally occur under undisturbed or natural conditions. Subsequent downstream sample collection could then result in an unrepresentative amount of oil in the drainage water. The amount of liquid sample obtained was usually 1 gallon. Samples were obtained by immersing the entire sample receptacle, where possible, into the stream or pond, with the top of the receptacle opening resting on the surface of the water. The fluid was then allowed to drain into the receptacle. This resulted in collecting surface water to a depth of approximately 1 inch. Gas samples were obtained by completely filling a stoppered bottle with available water and immersing the top of the inverted bottle in the water sur- rounding the gas seep. Gas bubbles then enter the opening in the bottle, displacing the water in the bottle. The bottle was stoppered while the top of the inverted bottle was still immersed in the water, thus preventing atmos- pheric contamination and loss of the gas sample. Owing to the large number of samples obtained and the commercial cost of analysis, duplicate samples were not sent to different laboratories to estab- lish indisputable results. ANALYTICAL PROCEDURES The water analyses contained in this report resulted as a secondary bene - fit derived from the primary objective of the analysis--determining how much oil was present in the water. The water analyses were obtained by atomic absorption spectrophotometry. The oil content of the water was determined by solvent extraction as described in the ap_pendix. 3 The oil was analyzed by routine distillation. The distillation recovers up to the point of thermal cracking. As a further exp l anation, 300° end point (E.P.) gasoline is good-grade gasoline. The 392 ° E.P. gasoline is regular- grade gasoline. The 500° E.P. distillates include diesel fuels, fuel oils, etc. All of the gas analyses were performed by the Bureau 's Helium Operations in Amarillo, Tex., utilizing standard gas-analysis methods. INISKIN PENINSUIA AREA The Iniskin Peninsula is described by the U.S. Geological Survey as being located "on SE coast of Alaska Peninsula between Chinitna and Iniskin Bays , 30 miles NE of Augustine Island.'~ The peninsula juts out into Cook Inl et and can be locat e d in the U.S. Geological Survey topographic map series on the Iliarnna quadrangle (fig. 1). Th e Iniskin Peninsula area falls within a geologic province known as the Cook Inlet Me sozoic Province. This province produces oil and gas in commer- cial quantities further to the north in the upper Cook Inlet Basin.3 According to the U.S. Geological Survey,4 'bil and gas seeps in the Iniskin Peninsula area of the Chinitna district, on the west shore of Cook Inlet, were discovered by the Russians about 1853 .... " It is believed that the hydrocarbons that occur on the surface migrate updip through fault zones . Supposedly, the seeps were initially staked in 1882 for oil exploration and development, but actual dr illing did not take place on the peninsula until 1900. The first exploratory well, drilled near Bowser Creek, had shows of oil, but was plugged and abandoned in 1903. Five additional wells were drilled on the peninsula by the end of 1906.5 All were nonproductive. 2 0rth, D. Dictionary of Alaska Place Names. U.S . Geol. Survey Prof . Paper 567, 1967, 1084 pp. 3 Blasko, D. P. Natural Gas Fields--Cook Inlet Basin, Alaska. BuMines OFR 35-74, 1974, 24 pp.; available for examination at the Alaska Field Operation Center offices in Juneau and Anchorage, Alaska, and in the office of the Associate Director , Mineral and Materials Supply/Demand Analysis, and th e Ce ntral Library , U.S. Department of the Interior, Washington, D.C. Blasko, D. P., W. J. Wenger, and J. C. Morris . Oilfields and Crude Oil Char- acteristics--Cook Inlet Basin, Alaska. BuMines RI 7688, 1972, 44 pp . 4 Miller, D. J., T. Payne, andG. Gryc. Geology of Possible Petroleum Provinces in Alaska. U.S. Geol . Survey Bull. 1094, 1959, 132 pp. 5 U.S. Bureau of Mines. Alaska 1/250,000 Scale Quadrangle Map Overlays Showing Exploratory Oil and Gas Well Drilling Locations and Productive Oil -and Gasfield Locations. BuMines OFR 69-73 , 1973, 87 overlays; available for examination at Bureau of Mines offices in Juneau and Anchorage, Alaska, and at the Office of Wilderness and River Basins, Washington, D.C. 4 lni1ki1 Shol R. 24 w. ..• 1tti••1 ...... ., ~- R.23W. R. 22 W. T 5S . FIGURE 1. -iniskin Peninsula, Alaska (adapted from U.S. Geological Survey map of the 11 iamna quadrangle). In September 1936, the Iniskin Drilling Co. spudded the IBA No. 1 (Iniskin Bay Association) south of Chinitna Bay . During 1936, the well was drilled to 2,540 feet and suspended for the winter. Gas shows were encoun- tered at three different intervals . In 1938, the well was reentered and deep- ened to 6,156 feet. Several zones were tested between 5,600 feet and 7,156 feet, resulting in a recovery of about 15 barrels of light-green, high -gravity oil. After testing, the well was again shut in for the winter season. Upon reentering the well and drilling to total depth of 8,775 fe e t, additional shows of oil and gas were encountered. The well was eventually plugged and abandoned as noncommercial. Other wells drilled on the Alaska Peninsula offered encouragement, but were eventually plugged and abandoned. In 1954, Alaska Consolidated Oil Co., Inc., began drilling the Iniskin Unit No. 1 on the Iniskin Peninsula. Drill- ing was suspended in November 1959, and the well was finally plugged and abandoned in 1964. Total depth of the well was 9,476 feet. The bit was reportedly drilling in Jurassic volcanics when the well was abandoned. Between 6,000 feet and 9,300 feet, the drilling records indicate oil saturation, but no recovery was made owing to lack of permeability. 5 Another semideep well drilled on the Iniskin Peninsula during 1958 -59 was the Alaska Consolidated Oil Co. Antonio Zappa No. 1 well, which had oil and gas shows, but was eventually abandoned. An interesting feature of this well is that the drilling records show that flowing hot salt water and steam were encountered on a drill-stem test at a depth of about 8,500 feet. There has been no drilling since that time, although the area still retains interest in terms of geologic prospecting . Pe rtinent data regarding the wells drilled on the Iniskin Peninsula are given in tab le 1. TABLE 1. -Wells drilled on Iniskin Peninsula Company Well Alaska Consolidated Iniskin Oil Co., Inc. Unit, Beal No. 1. Do ............... Iniskin Unit, Zappa No. 1. Alaska Oil Co ...... No . 1.. Do ............... No. 2 .. Alaska Petroleum No . 1.. Co. Do ............... No. 2 .. Do ............... No. 3 .. Do ............... No. 4 •. In is kin Drilling IBA Co. No. 1. 1 Based on Seward meridian. 2 Abandoned at shallow depth . Com- Location1 Spudded pleted 2,000 ' w, 1, 700 I N 8/4/54 1959 of SE corner sec 17, T 5 S, R 23 W. 2 ,3 70 I s' 290 I W Of 12/25/58 11/7 /61 NE corner, sec 18' T 5 S, R 23 W. SE l/4NWl/4 sec 35' 1902 1902 T 5 S, R 23 W. NE1/4SW1/4 sec 35' 1903 1903 T 5 s' R 23 W. NE1/4SW1/4 sec 11, 1900 1903 T 6 S, R 24 W. SW1/4NW1/4 sec 11, 1904 1904 T 6 S, R 24 W. SW1/4NW1/4NW1/4 1904 1904 sec 11, T 6 S, R 24 W. NW l I 4SW1/ 4NW 1I4 1906 1906 sec 11, T 6 S, R 24 W. 1,500' w, 1, 125 I N 9/7 /36 1939 of SW corner sec 8, T 5 S . R 23 W. Well Creek, Bowser Creek , and Oil~ Total depth, Status feet 9,746 Plugged and abandoned. 11, 231 Do. 320 Do. (2) Do. 1,000 Do. 450 Do. 930 Do. 1,905 Do. 8, 775 Do. Active gas seeps and suspected active oil seeps were observed in the area of the junction of Well Creek and Bowser Creek (fig . 2) in secs 10-11, T 6 S, R 24 W, Seward meridian (Iliamna quadrangle). Since it was the custom in early exploration for oil in Alaska to drill wells near, at, or on oil seeps, the seep area was located by surface evidence of oil-well drilling (that is, abandoned wells, boiler 6 ... + ~::i:::::::::::+~.... C H JN I T N A + 6 Mt.Chtnlto T.5S. +40° LEGEND ICS -ln i sk i n Creek Sample WCS -We ll Creek Sample BCS -Brown Cr ee k Sample BoCS -Bowse r Cree k Sample OBS -Oi l Ba y Sa mple FIGURE 2. -Oil , gas, and water sampling locations on the lniskin Peninsula (adapted from the U.S . Geological Survey map of the lliamna quadrangle), equipment, etc.). In this instance, an old boiler was spotted, partial ly hidden by trees and other plant growth . Two abandoned wel l s were locate d nearby, near the west bank of Bowser Creek. The wells were drilled by the Al aska Petroleum Co. between 1900 and 1906; the deepest went to approximately 7 1,900 feet . One well was situated on dry ground and the surface casing stuck up out of the ground about 2 feet, encased in what appeared to be cement and barrel staves. A wooden plug was wedged into the casing . No oil, gas, or water appeared to be escaping from this well or the area surrounding the well. Another well was located about 70 feet to the north. The surface casing pro - truded about 1 foot above the pool of water surrounding it. The casing was full of water, but the water did not appear to be flowing under pressure. Gas was bubbling up through the water inside the casing, and a sample of the gas and water in the casing was obtained. The gas displaced the water inside the sample bottle within about 1 minute. The gas would flame an ignited match, but would not sustain the flame. An analysis of th~ gas and water from this well is given in tables 2-3. There did not appear to be any discharge of water or oil attendant with the bubbling gas well. Another well (fig. 2), believed to be drilled by the Alaska Petroleum Co. in 1906, was located on the south bank of Well Creek about one -half mile upstream from the juncture of Well Creek and Bowser Creek. The well casing sticks up approximately 2-1/2 feet out of the surrounding pool of water. Oil was observed inside the casing, which was badly corroded on one side , and on the pool of water surrounding the casing . This pool of water drains directly into Well Creek. A sample of the water from the pool was obtained. Directly across the creek from the well were several oil seep areas. Four distinct seeps were spread over a distance of approximately 375 feet. The ponds containing suspected seep oil were located at the base of a well- defined, northeast-trending ridge. The oil on top of the pools of water appeared to be thick and weathered, and clung to the edges of the pool and adhered to the vegetation. Vegetation growth did not seem to be affected. When draining from the pools into Well Creek, the bitumen broke up and floated a sheeny rainbow from the pools into Well Creek. Oil sheen and oil residue were evident on almost all standing water in the grassy swamp. There were no indications that the oil seeps were vigorously active, such as gas bubbles, oil flow, etc.; however, the presence of relatively fresh oi l drop- lets indicated that the seeps were at least occasionally active . One Well Creek water sample was taken at a point above the drainage from the oil seep areas. Another Well Creek water sample was obtained at a point just below the last drainage from the observed seeps. Well Creek seep sam- ples were taken at what appeared to be the seep locations. Figure 3 illus- trates the relative position of the area and the sample locations. Analyses of samples from the well, stream, and seep of Well Creek are found in table 4. No indications of gas seeps were observed. In order to determine what effect, if any, the natural seeps have on the surrounding drainages, samples of water were taken on Bowser Creek at the fol - lowing points: above the point where Well Creek joins Bowser Creek , immedi- ately below where Well Creek joins Bowser Creek, at Bowser Creek below where the drainage from the gassy Bowser Creek well enters, and at the mouth of Bowser Creek at low tide. The analyses of these samples appear in table S. Since Bowser Creek drains into the head of Oi l Bay, water samples were also obtained from Oil Bay. Analyses appear in table 6. 8 TABLE 2.-Analysis of water from Bowser Creek well Sample from: Well x Stream Seep Other --- Area Iniskin Peninsula Sampled by U.S. Bureau of Mines Location NW 1/4, Sec. 11, T6S, Date samp l ed-"""6/~7--=3'-------- R24W (SM) Quadrangle 11 i amna Pertinent data regarding sample: Dry hole well. Gas bubbling up through water in surface casing. Analysis: Performed by Commercial firm Provided by ~---------------~ Special results: Oil content, mg/1---5.1 Ana 1ysis: Ca tions Mg/liter Meg/liter Anions Sodium 1109 48.23 Carbonate Potassium 2 0.05 Bi carbonate Magnesium 5 0.41 Sul fate Ca lei um 625 24.94 Sulfide Iron Chloride Hydroxide Total Cation 73.63 Total Anion Total dissolved solids, Mg/liter 4354 Observed pH 7. 3 Mg/ 1 i ter 0 67 30 2550 Specific resistance at 68 °F l . 48 ohm meters Meq/l iter 1.10 0.62 71 . 91 73.63 TABLE 3.-Analysis of gas from Bowser Creek well Stream Other Wel 1 X ---Sample from: Seep ------- Area Iniskin Peninsula Sampled by U.S. Bureau of Mines Location NW 1I4, Sec . 11 , T6S, Date sarnp 1 ed_6...,./_7 .... 3 ______ _ R24v/ (SM) Quadrangle Iliamna -~~;_,;;;.... ___ _ Pertinent data regarding sample: Dry hole well. Gas bubbling up through water in surface casing. Analysis: Performed by U.S. Bureau of Mines ~-----------~------- Provided by __________________ _ Specia 1 results: Analysis: Methane 79 .2 % Normal Pentane 0.0 % Oxygen 0 .0 % Ethane 0.0 % Isopentane 0.0 % Argon 0.2 % Propane Trace % Cyclopentane 0 .0 % Hydrogen 0.0 % Nor mal Butane 0.0 % Hexanes Plus 0.0 % H2S 0.0 % Isobutane 0.0 % Nitrogen 20 .4 % C02 0. l % Helium 0 .01% Total 99.9 % Calculated gross Btu/cu.ft., dry at 60°F. and 30 11 mercu ry 802 Specific Gravity 0.641 9 10 TABLE 4. -Anal~ses of water from Well Creek See pertinent Sample from: Well Stream Seep Other data Area Iniskin Peninsula Location NW 1/4, Sec. 11, T6S, R24W (SM) Quadrangle Iliamna -------- Sampled by U.S. Bureau of Mines Date samp l ed.......:6 .... 1....:...7-=-3 _____ _ Pertinent data regarding sample: Sample obtained from pond of water surrounding old abandoned well. Analysis: Performed by Commercial firm Provided by ---------------~- Special results: Analysis: Cations Mg/liter Meg/liter Sodium 1204 52.38 Potassium 6 0 .15 Magnesium 25 2.06 Ca lei um 860 34. 31 Iron Total Cation 88.90 Total dissolved solids, Mg/liter Observed pH Specific resistance at 68 °F Anions Carbonate Bicarbonate Sul fate Sulfide Chloride Hydroxide Total Anion 5226 7.0 Mg/liter 0 256 5 3000 l · 40 ohm meters Meg/liter 4.20 0 .10 84.60 88.90 TABLE 4. -Analyses of water from Well Creek--Continued Sample from: Well ---Stream __ x_ Seep __ _ Other --- Area Iniskin Peninsula Location NE 1/4, Sec. 10, T6S, R24W (SM) Quadrangle Iliamna -------- Sampled by U.S. Bureau of Mines Date sampled 6/73 -------- Pertinent data regarding samp le: Well Creek water sample upstream of oil seep area. Analysis: Performed by Commercial firm Provided by ----------------- Special results: Analysis: Cations Mg/liter Meg/liter Anions Sodium 72 3. 12 Carbonate Potassium Trace Bicarbonate Magnesium 2 0 .16 Sul fate Ca 1ci um 4 0.16 Sulfide Iro n Chloride Hydroxide Total Cation 3.44 Total Anion Total dissolved solids, Mg/liter 220 Observed pH 6.5 Mg/liter 0 49 94 24 Specific resistance at 68 °F 90.0 ohm meters --- Meg/liter 0.80 1. 96 0.68 3.44 11 12 TABLE 4. -Analyses of water from Well Creek --Continued Sample from: Well Stream X Seep Other __ _ --- Area Iniskin Peninsula Sampled by U.S. Bureau of Mines Location NE 1/4, Sec. 10, T6S, R24W (SM) Quadrangle Iliamna -------- Date samp 1 ed_6/_7_3 _____ _ Pertinent data regarding sample: Well Creek water sample below drainage of observed seeps. Analysis: Performed by Corrmerci al firm Provided by ________________ _ Special results: Oil content, mg/1---8.4 Analysis: Cations Mg/liter Meg/liter Anions Mg/liter Meg/liter Sodium 24 1.04 Carbonate 0 Potassium Trace Bicarbonate 49 0.80 Magnesium 0 .08 Sulfate Trace Calcium 4 0 .16 Sulfide Iron Chloride 17 0.48 Hydroxide Tota 1 Cation 1. 28 Total Anion 1.28 Total dissolved solids, Mg/l iter 70 --- Observed pH _6_._7 __ Specific resistance at ~°F ohm meters ---100 TABLE 4. -Analyses of water from Well Creek--Continued Seep X Other ---Sample from : Well ---Stream --- Area Iniskin Peninsula Location NE 1/4, Sec. 10, T6S, R24W (SM) Sampled by U.S. Bureau of Mines Date sampled 6/73 ~------- Quadrangle Iliamna _;:;...-..;.-..-.;.;..:..=----- Pertinent data regarding sample: Sample from seep pond. Analysis: Performed by Commercial firm Provided by ----------------- Special results: Oil content, mg/1---9773 Analysis: Cations Mg/liter Meg/liter Anions Sodium 23 Potassium Magnesium l Ca lei um 4 Iron Tota 1 Cation 1.02 0.03 0 .08 0. 16 l. 29 Carbonate Bicarbonate Sulfate Sulfide Chloride Hydroxide Tota 1 Anion Total dissolved solids, Mg/liter 71 --- Observed pH 6.3 Mg/liter Meg/liter 0 49 0 .80 2 0.04 16 0.45 l. 29 Specific resistance at 68 °F 6.3 ohm me t ers --- 13 14 TAB LE 4. ~Analyses of water from Well Creek --Cont inued Sample from: Well Stream Seep X Other ------------ Area Iniskin Peninsula Location NE 1/4, Sec. 10, T6S, R24W (SM) Sampled by U.S. Bureau of Mines Date sampled 6/73 -------- Quadrangle Iliamna -------- Pertinent data regarding sample: Sample from seep pond. Analysis: Performed by Commercial firm Provided by ________________ _ Special results: Oil content, mg/1---6938 Analysis: Cations Mg/liter Meg/liter Anions Mg/l iter Meg/liter Sodium 21 0.90 Carbonate 0 Potassium 1 0.03 Bicarbonate 49 0 .80 Magnesium 1 0.08 Sul fate 4 0.08 Ca lei um 3 0 .12 Sulfide Iron Chloride 9 0.25 Hydroxide Total Cation 1.1 3 Total Anion 1.13 Total dissolved solids, Mg/liter _63 __ Obse rved pH 6. 2 Specific resistance at 68 °F 145 ohm meters ~;:;;.._- TABLE 5.-Analyses of water from Bowser Creek Sample from: Well Stream X Seep Other Area Iniskin Peninsula Location NW 1/4, Sec. 11, T6S, R24W (SM) Quadrangle Iliamna -------- Pertinent data regarding sample: ------ Sampled by U.S. Bureau of Mines Date sampled 6/74 -------- Sample obtained in Bowser Creek 100 feet upstream of juncture of Well Creek and Bowser Creek . Analysis: Performed by Commercial firm Provided by ----------------------- Special results: Oil content, mg/1----<0.1 Analysis: Cations Mg/liter Meg/liter Anions Mg/ 1 i ter Meg/liter Sodium 43 1.86 Carbonate 0 Potassium Trace Bicarbonate 48 0 .79 Magnesium Trace Sulfate 12 0.25 Ca lei um 5 0.25 Sulfide Iron Chlor ide 38 1.07 Hydroxide Tota 1 Ca ti on 2 .11 Total Anion 2.11 Total dissolved solids, Mg/liter 122 Observed pH 7.2 Specific resistance at 68 °F 49. 7 ohm meters 15 16 TABLE 5. -Analyses of water from Bowser Creek--Continued Sample from: Well Stream X Seep Other --- Area Iniskin Peninsula Location NW 1/4, Sec. 11, T6S. R24W (SM) Quadrangle Iliamna ~--------- ------ Sampled by U.S. Bureau of Mines Date sampled 6/74 ---'--------- Pertinent data regarding sample: Sample obtained about 10 0 feet down- stream of Well Creek and Bowser Creek. Analysis: Performed by Commercial firm Provided by ________________ _ Special results: Oil content, mg/1 ---377 Analysis: Cations Mg/liter Meg/liter Anions Mg/1 i ter Meg/liter Sodium 36 1.55 Carbonate 0 Potassium Trace Bicarbonate 41 0.67 Magnesium Trace Sul fate 8 0. 17 Ca lei um 5 0.25 Sulfide Iron Chloride 34 0.96 Hydroxide Total Cation l.80 Total Anion 1.80 Total dissolved solids, Mg/liter 103 Observed pH 6 .9 Specific resista~ce at 68 OF 56.7 ohm meters TABLE 5. -Analyses of water from Bowser Creek--Continued Stream X Seep __ _ Other ---Sample from: Well --- Area Iniskin Peninsula Sampled by U.S . Bureau of Mines Location NW 1/4, Sec. 11, T6S, R24W (SM) Date samp 1 ed_6_/_7_4 _____ _ Quadrangle Iliamna ---~------ Pertinent data regarding sample: Sample obtained about 100 feet down- stream from bubbly gas well. Analysis: Performed by Commercial firm Provided by ____________ ----- Special results: Oil content, mg/l ---4.0 Analysis: Cations Mg/liter Meg/liter Anions Mg/1 i ter Meg/liter Sodium 39 1. 71 Carbonate 0 Potassium Trace Bi carbonate 41 0.67 Magnesium Trace Sulfate 13 0.27 Calcium 5 0.25 Sulfide Iron Chloride 36 1.02 Hydroxide Tota 1 Cation 1.96 Total Anion l. 96 Tota l dissolved solids, Mg/liter 113 --- Obse rved pH 6.8 Specific resistance at 68 °F 56.9 ohm meters 17 18 TABLE 5. -Analyses of water from Bowser Creek--Continued Sample from: Stream X Well ---Seep __ _ Other --- Area Iniskin Peninsula Sampled by U.S. Bureau of Mines Location SW 1/4, Sec. 11, T6S, R24W (SM) Date samp 1 ed_6...;./_7_4 _____ _ Quadrangle Iliamna -------- Pertinent data regarding sample: Sample obtained from Bowser Creek about 200 feet upstream of mouth at low tide. Analysis: Performed by Commercial firm Provided by ________________ _ Special results: Oil content , mg/1---14 Analysis: Cations Mg/liter Meg/liter Anions Sodi um 285 Potassium 11 Magnesium 16 Calcium 5 Iron Tota 1 Cation 12. 39 0.28 1.32 0.25 14. 24 Carbonate Bi ca rbo na te Sul fate Sulfide Chloride Hydroxide Tota 1 Anion Total dissolved solids, Mg/liter 835 Observed pH 6.7 Mg/liter Meg/liter 0 49 0.80 66 1. 37 428 12.07 14.24 Specific resistance at ~0 f 7 · l 3 ohm meters TABLE 6.-Analyses of water from Oil Bay Sample from: Well Stream Seep See pertinent Other data --- Area Iniskin Peninsula Location NE 1/4 , Sec. 23, T6S, R24W (SM) Quadrangle Iliamna -------- ------ Sampled by U.S. Bureau of Mines Date sampled 6/74 -------- Pertinent data regarding sample: Sample obtained from seawater of coastal bay called Oil Bay. Analysis: Performed by Commercia l firm Provided by -~------~------~~ Special results: Oil content, mg/1---0.l Analysis: Cations Mg/liter Meg/liter Anions Mg/liter Meg/liter Sodium 2584 112.38 Carbonate 0 Potassium 187 4 .79 Bicarbonate 111 1.82 Magnesi um 230 18 . 91 Sul fate 7 0; 15 Calcium 25 1.25 Sulfide Iron ChJoride 4800 135. 36 Hydroxide Tota 1 Cation 137. 33 Total Anion 137. 33 Tota 1 dissolved solids, Mg/liter 7888 Observed pH 6.9 Specific resistance at 68 Of 0 · 405 ohm meters 19 20 TABLE 6. -Analyses of water from Oil Bay--Continued See Sample from: Well Stream Seep pertinent Other data --- Area Iniskin Peninsula Location NE 1/4 , Sec. 26, T6S, R24W (SM) Quadrangle Iliamna -------- ------ Sampled by U.S. Bureau of Mines Date sampled 6/74 -------- Pertinent data regarding sample: Sample obtained from seawater of coastal bay at the mouth of Oil Bay near Oi 1 Reef. Analysis : Performed by Commercial firm ----------------~ Provided by ----------------~ Special results: Oil content, mg/1---<0.l Analysis: Cations Mg/liter Meg/liter Anions Mg/ 1 i ter Meg/liter Sodium 9754 424.29 Carbonate 0 Potassium 430 11 .01 Bi carbonate 134 2.20 Magnesium 498 40.94 Sulfate 12 0.25 Calcium 56 2.79 Sulfide Iron Chloride 16900 476.58 Hydroxide Total Cation 479.03 Total Anion 479.03 T0ta 1 dissolved solids, Mg/liter 27716 Observed pH 7.2 Specific res is ta nee at 68 °F 0 · 24 ohm meters Well Creek So111ple Som pie Well Creek Sample M E A D 0 w Well Creek Seep (No Somple) 21 - / -/~~- 210' ~ --/// ~---- / ;~ D -,,,.--Well Creek Seep Somple _ / _, / 5' -~ _.. iw-:,;,.;:;::: G Sample -----___.. -- FIGURE 3. -Well Creek sampling locations. 22 Samples of the surface beach sand at the head of Oil Bay were taken. One sample, taken about 100 yards east of the mouth of Bowser Creek on the west side of the tidal flats, had a bitumen content of 8.0 mg/l. A reconnaissance of the beaches was made at both high and low tides from the mouth of Oil Bay near Oil Reef, extending across the tidal flat and over to Oil Point. It did not reveal any additional seeps or any unusual deposits of oil, tar, slick, scum, etc. Brown Creek and Dry Bay Brown Creek was reconnoitered from a point above Rich Creek to Dry Bay in an effort to locate oil and gas seeps. Gas seeps were located during the reconnaissance (fig . 2). Several were sampled, but the results are not included because of the possibility of contaminated samples and unreliable analyses. In SWl/4 sec 26, T 5 S, R 23 W, Seward meridian, two distinct areas of gas seeps were found. On the west side of Brown Creek, a calm-water pond, fed by small springs and measuring about 15 feet wide, 35 feet long, and approxi- mately 2 feet deep, contained a substantial gas seep . Gas bubbles emerged intermittently throughout the pond in about 15 or 20 different and scattered places at approximately 30 -second intervals. No attempt was made to sample the gas because of the inconsistency of the seep location. Another gas seep was located nearby in fast-moving Brown Creek near the west bank. Gas bubbles emerging from the creekbed would be swept downstream about 15 to 20 feet before emerging at the surface. The gas appeared to be continuous and consistent . In SW1/4NE1/4 sec 35, T 5 S, R 23 W, Seward meridian, the remains of the equipment that Alaska Oil Co. used in 1902 to drill wells on Brown Creek were located . An old bailer, an old stove, and rotted lumber were evident, but the remains of the oil wells were not located. The area was looked over very closely , but there were no indications of oil or gas seeps. Samples of water were obtained from Brown Creek immediately above and immediately below the remains of the drilling equipment. The analyses appear in table 7. Another gas seep in Brown Creek was located about 1,500 yards upstream from the beachline of Dry Bay. Analyses of water samples upstream and down- stream from the gas seep are also found in table 7. TABLE 7.-Analyses of water from Brown Creek Sample from: We11 ---Stream X Seep __ _ Other --- Area Iniskin Peninsula Location NE 1/4, Sec. 35, T5S, R23W (SM) Sampled by U.S. Bureau of Mines Date sampled 6/74 -------- Quadrangle Iliamna ----............ =---~---- Pertinent data regarding sample: Sample obtained from Brown Creek ·upstream of old drilling area. Analysis: Performed by Co11111ercial firm Provided by ________________ _ Spec ial results: Oil content, mg/1---0.1 Analysis: Cations Mg/l iter Meq/l i ter Anions Mg/1 i ter Meg/1 i ter Sodium 14 0 . 61 Carbonate 0 Potassium Trace Bicarbonate 26 0 .43 Magnesium Trace Sul fate 7 0 .15 Calc ium 4 0.20 Sulfide Iron Chloride 8 0.23 Hydroxide Total Cation 0 .81 Total Anion 0.81 Total dissolved solids, Mg/liter 46 --- Observed pH 6 .8 Spec ific resistance at 68 °F 120 ---ohm me ters 23 24 TABLE 7. -Analyses of water from Brown Creek--Continued Sample from: Well ---Stream X Seep Other Area Iniskin Peninsula Location NE 1/4, Sec. 35, T5S, R23W (SM) Quadra ng l e___.r ..... J ..... i=am=n=a ___ _ --- Sampled by U.S. Bureau of Mines Date sampled 6/74 -------- Pertinent data regarding sample: Sa mpl e obtained from Brown Creek down- stream from old drilling area. Analysis: Performed by Commercial firm Provided by ------------------ Special results: Oil content, mg/1---5.2 Analysis: Cations Mg/liter Meg/liter Anions Mg/liter Meg/liter Sodium 19 0.81 Carbonate 0 Potassium Trace Bi carbonate 37 0. 61 Magnesium Trace Sul fate 8 0. 17 Ca lei um 4 0.20 Sulfide Iron Chloride 8 0.23 Hydroxide Tota 1 Cation 1.01 Total Anion l.01 Total dissolved solids, Mg/liter 57 Observed pH 6.8 Specific resistance at 68 OF 149 ohm meters TABLE 7 .· -Analyses of water from Brown Creek--Conti nued Sample from: Well Stream X Seep __ _ Other --- Area Iniskin Peninsula Location NW 1/4, Sec. 2, T6S, R23W (SM) Qua dra ng 1 e_I"""'l._.j-=a=m=na=------ Per ti nent data regarding sample: --- Sampled by U.S. Bureau of Mines Date sampled 6/74 ---------- Sample obtained from Brown Creek up- stream of lower gas seep. Analysis: Performed by Commercial firm Provided by ~-----------------~~ Special results: Oil content, mg/1---1 .5 Analysis : Cations Mg/liter Meg/liter Anions Mg/liter Meg/liter Sodium 17 0.73 Carbonate 0 Potassium Trace Bicarbonate 39 0.64 Magnesium Trace Sul fate 6 0.12 Ca lei um 4 0.20 Sulfide Iron Chloride 6 0 .17 Hydroxide Tota 1 Cation 0.93 Total Anion 0.93 ·;otc.1 dissolved solids, Mg/liter 52 Observed pH 7. 1 Specific resistance at 68 OF 129 ohm meters 25 26 TABLE 7. -Analyses of water from Brown Creek--Continued Sample from: Well Stream X Seep Other --- Area Iniskin Peninsula Location NW 1/4, Sec . 2, T6S, R23W (SM) Qua dra ng 1 e_r ..... J._.j.£:.a .... mn=a=------- Pert i nent data regarding sample: ------ Sampled by U.S. Bureau of Mines Date sampled 6/74 ---------- Sample obtained from Brown Creek down- stream of lower gas seep. Analysis: Performed by Commercial f i r m Provided by -------------------~ Special results: Oil content, mg/1,--2.4 Analysis: Cations Ms/liter Meg /liter Anion s Mg/liter Meg /liter Soaium 19 0.84 Carbonate 0 Potassium Trace Bicarbonate 39 0 .64 Magnesium Trace Sul fate 8 0 .17 Calcium 4 0.20 Sulfide Iron Chloride 8 0 .23 Hydroxide To ·'4 l Cation l.04 Total Anion l.04 Tota i dissolved solids, Mg/liter 58 --- Observed pH 6.8 S;.>~c.fic resistance at ~°F 128 ohm meters --- 27 lniskin Camp· Area As part of the project to determine the source and amount of bitumen that may be entering the Gulf of Alaska waters, it is normal procedure to seek out and inspect any known abandoned exploratory wells in the area of interest. To this end, three wells previously discussed were investigated: Beal No. 1, IBA No . 1, and Zappa No. 1. One well, !BA No. 1, drilled and abandoned in 1939, was found to be in good condition . No sign of bitumen was in evidence. No oil or gas seeps were found. At the drilling site of Zappa No . 1, abandoned in 1961, water with a rainbow sheen was emanating from a spring area near a built-up pad housing a test tank. It has not been determined whether the bitumen is from an oi l seep or from past industrial operations. The bitumen enters a small creek that drains into upper Fitz Creek. The rainbow is evident throughout the small creek drainage, as is a petrolic odor. However, the well is in good shape and shows no sign of contributing pollution. The same is true at the Beal No. 1 well. Rainbow -c olored sheen was seen on small ponds that surround the drill- ing pad and drain into Fitz Creek, but no particular natural oil seeps were identifiable. The observance of these bitumen occurrences took place in early sunmer of 1973 when the last of the winter snows were thawing rapidly and drainages were running swift and high. Another visit was made to the area during a rela- tively dry period in 19 74 when creeks were noticeably low . Standing pools of water exhibited the rainbow sheen when disturbed, but no bitumen was observed ooz ing out of earth in places previously noted. Comparisons of water samples taken during the wet and dry periods leads to the conclusion that it is quite possible that the only time bitumen (whether from natural seeps or past industrial operations) enters the drainage in the Iniskincamp area (fig. 2) is during periods of runoff caused by rain or snow melt. The water analyses from the Iniskin camp area are found in table 8. 28 TABLE 8.-Analyses •of water from Iniskin camp seep area Sample from: Well Stream Seep X Other Area Iniskin Peninsula-Zappa We l l Sampled by U.S. Bureau of Mines Location SE 1/4, Sec . 18, T5S, R23W (SM) Quadrangle Iliamna ~~~~~~~~ Date sampled 6/73 ~~~~~~~~ Pertinent data regarding sample: Sample obtained from soil surrounding suspected seepage. Analysis: Performed by Commercial firm Provided by ~~~~~~~~~~~~~~~~~ Special results: Oil content, mg/l---943 Analysis: Cations Mg/liter Meg/liter Anions Mg/1 i ter Meg/liter Sodium 456 19.82 Carbonate 0 Potassium 41 1.05 Bi carbonate 2208 36.2 1 Magnesium 63 5 .18 Sul fate 25 0.52 Ca lei um 317 12.65 Sulfide Iron Chloride 70 1.97 Hydroxide Total Cation 38.70 Total Anion 38 .70 Total dissolved solids, Mg/liter 2059 Observed pH 8. l Specific resistance at 68 °F 3. 6 ohm meters TABLE 8. -Analyses of water from Iniskin camp seep area--Continued Sample from: We11 ---Stream X Seep ---Other --- Area Iniskin Peninsula-Zappa Well Sampled by U.S. Bureau of Mines Location SE 1/4, Sec. 18, T5S, R23W (SM) Quadra ng 1 e_.._Il ....... i .... a ..... m"""na~--- Pert i nent data regarding sample: Date samp 1 ed __ 6_/_7_3 ____ _ Sample obtained from Fitz Creek upstrea m of observed seepage during wet period. Analysis: Performed by Commercial firm Provided by ~---------------~ Special results: Oil content, mg/1---7.4 Analysis: Cations Mg/liter Meg/liter Anions Mg/1 i ter Meg/liter Sodium 26 l.14 Carbonate 0 Potassium 1 0.03 Bi carbonate 49 0.80 Magnesium 1 0.08 Sulfate 12 0.25 Ca lei um 2 0.08 Sulfide Iron Chloride 10 0.28 Hydroxide Total Cation l. 33 Total Anion l. 33 Tota 1 dissolved so 1 ids, Mg/1 i ter 76 Observed pH 7.0 Specific resistance at 68 Of 105 ohm meters 29 30 TABLE 8. -Analyses of water from Iniskin camp seep area--Continued Sample from: Well ---Stream X Seep ---Other --- Area Iniskin Peninsula-Zappa Well Sampled by U.S. Bureau of Mines Location SE 1/4, Sec. 18, T5S, R23W (SM) Date sampled 6/74 -------- Quadrang 1 e_I_l_i a;....m_n_a ___ _ Pertinent data regarding sample: Sample obtained from Fitz Creek upstream of observed seepage during dry period. Analysis: Performed by Commercial firm Provided by ________________ _ Special results: Oil content, mg/1---0.l Analysis: Cations Mg/liter Meg/liter Anions Sodium 28 Potassium Trace Magnesium Trace Ca lei um 5 Iron Tota 1 Cation 1.23 0.25 1.48 Carbonate Bicarbonate Sul fate Sulfide Chloride Hydroxide Tota 1 Anion Total dissolved solids, Mg/liter 85 Observed pH 6.8 Mg/liter Meg/liter 0 41 0.67 12 0.25 20 0.56 1.48 Specific resistance at 68 °F 83 .9 0 ohm meters TABLE 8. -Analyses of water from Iniskin camp seep area--Continued Sample from: Well Stream X Seep Other --- Area Iniskin Peninsula-Zappa Well Sampled by U.S. Bureau of Mines Location SE 1/4, Sec. 18, TSS, R23W (SM) Date sampled 6173 -------- Qua dra ng 1 e--=-Il~i:...:a~m.:..:..:na:::-___ _ Pertinent data regarding sample: Sample obtained from Fitz Creek ~ownstream from observed seepage during wet period . Analysis: Performed by Commercial firm ----------------------~--~- Provided by ------------------------------ Spec ial results: Oil content, mg/1---5.3 Analysis: Cations Mg/liter Meg/liter Anions Mg/liter Meg/liter Sodium 98 4.28 Carbonate 0 Potassium 1 0.03 Bi carbonate 61 1.00 Magnesium 2 0 .16 Sul fate 20 0.42 Calcium 1 0.05 Sulfide Iron Chloride 110 3.10 Hydroxide Tota 1 Ca ti on 4.52 Total Anion 4 .52 Tota 1 dissolved so lids, Mg/liter 262 Observed pH 6.7 Specific resistance at 68 OF 83 ohm meters 31 32 TABLE 8 . -Analyses of water from Iniskin camp seep area--Continued Sample from: Well Stream X Seep __ _ Other ------ Area Iniskin Peninsula-Zappa Well Sampled by U.S. Bureau of Mines Location SE 1/4, Sec. 18, T5S, R23W (SM) Qua dra ng l e Il i amna ------~~ Date sampled 6/74 -------- Pertinent data regarding sample: Sample obtained from Fitz Creek down- stream from observed seepage during dry period. Analysis: Performed by_C_o_mm_e_r_c_i_a_l _f_i_r_m _________ _ Special results: Oil content, mg/1---<0.l Analysis : Cations Mg/liter Meg/liter Anions Mg/1 i ter Meg/liter Sodium 26 1.12 Carbonate 0 Potassium Trace Bicarbonate 40 0.66 Magnesium Trace Sul fate 7 0 .15 Ca lei um 4 0.20 Sulfide Iron Chloride 18 0. 51 Hydroxide Total Cation 1.32 Total Anion 1.32 Total dissolved solids, Mg/liter 75 Observed pH 6.7 Specific resistance at 68 OF 84 ohm meters TABLE 8. -Analyses of water from Iniskin camp seep area --Continued Samp l e from : Well Stream ·---Seep X Other ------------- Area Iniskin Peninsula-Beal Well Sampled by U.S. Bureau of Mines Location NW 1/4, Sec. 17, TSS, R23W (SM) Date sampl ed. __ 6_/_73 ____ _ Quadransle Iliamna ~~---------~ Pe r t i nent data regarding sample: Sample obtained from soil surrounding suspected seepage . Analysis: Performed by Commercial firm Provided by ---------------------~-------~ Specia l results: Oil content, mg/l---148 Analysis : Cations Mg/liter Meq/1 iter Anions Mg/liter Sodium 1950 84 .81 Carbonate 0 Potassium 23 0 . 59 Bi carbonate 634 Magnesium 63 5 .18 Sul fate 15 Ca l c i um 1108 44.21 Sulfide Iron Chloride 4400 Hydroxide Tota 1 Cation 134.79 Total An i on Total dissolved solids, Mg/l iter 7871 --- Observed pH 6. 4 Spec i fic res i stance at ~°F 78.5 ohm meters Mcq/1 iter 10.40 0 . 31 124.08 134.79 33 34 TABLE 8. -Analyses of water from Iniskin camp seep area--Continued Sample from: Well ---Stream __ x_ Seep __ _ Other --- Area Iniskin Peninsula-Beal Well Sampled by U.S. Bureau of Mines Location NW 1/4, Sec. 17, T5S, Date sampled_6_/_7_3 ____ _ R23W (SM) Qua dra ng 1 e__._J .._l 1...,.,· a=m"""na=------ Pert i nent data regarding sample: Sample obtained from pond drainage near suspected seep during wet period. Analysis: Performed by Commercial firm Provided by ~------------~~~- Special results: Oil content, mg/1---8.3 Analysis: Cations Mg/liter Meg/liter Anions Mg/1 i ter Meg/liter Sodium 1199 52. 17 Carbonate 0 Potassium 14 0.36 Bicarbonate 37 0.61 Magnesium 5 0.41 Sul fate 20 0.42 Ca lei um 890 35.31 Sulfide Iron Chloride 3100 87.42 Hydroxide Total Cation 88.45 Total Anion 88.45 Total dissolved solids, Mg/liter _52_4_6 __ Observed pH 6.5 Specific resistance at ~°F 1 · 25 ohm meters TABLE 8. -Analyses of water from Iniskin camp seep area--Continued Well ---Stream X -"'----- Seep __ _ Other ---Samp 1 e from: Area Iniskin Peninsula-Beal Well Sampled by U.S. Bureau of Mines Location NW 1/4, Sec. 17, T5S, R23W (SM) Date samp l ed_--'6/~7_4 ____ _ Quadra ng l e_11 ..... ; .... a .... mn ... a.__ ___ _ Pertinent data regarding sample: Sample obtained from pond drainage near suspected seep during wet period. Analysis: Performed by Commercial firm Provided by ________________ _ Special results: Oil content , mg/1---0.l Analysis: Cations Mg/1 iter Meg/liter Anions Mg/liter Meg/liter Sodium 24 1.03 Carbonate 0 Potassium Trace Bicarbonate 37 0.61 Magnesium Trace Sul fate 8 0 .17 Ca lei um 4 0.20 Sulfide Iron Chloride 16 0.45 Hydroxide Total Cation l.23 Total Anion 1. 23 Total dissolved solids, Mg/liter 70 Observed pH 6.7 Specific resistance at _§_oF 83.8 ohm meters 35 36 TABLE 8. -Analyses of water from Iniskin camp seep area--Continued Sample from: Well Stream ---x Seep Other --- Area Iniskin Peninsula Sampled by U.S. Bureau of Mines Lo cation NE 1/4, Sec. 25, T4S, R23W (SM) Date sampled 6174 -------- Qua dra ng 1 e_...1 .1.-l ;Lllllau.um..u.ina11...-___ _ Pertinent data regarding sample: Sample obtained from mouth of Fitz Creek. Analysis: Performed by Commercial firm Provided by --------------------~ Special results: Oil content, mg/1 --....::0.1 Analysis: Cations Mg/1 iter Meg/liter Anions Mg/liter Meg/liter Sodium 26 1.12 Carbonate 0 Potassium Trace Bicarbonate 43 0.71 Magnesium Trace Sulfate 13 0.27 Ca lei um 4 0.20 Sulfide Iron Chloride 12 0 .34 Hydroxide Total Cation l. 32 Total Anion 1. 32 Total dissolved solids, Mg/liter 76 Observed pH 6.9 Specifi c resistance at 68 Of 86.0 ohm meters 37 BECHAROF LAKE There are essentially three areas around Becharof Lake where oil and gas seeps have been known to exist . One area is the dominant anticlinal feature extending from the east end of Becharof Lake eastward to the ocean waters bordered by Puale Bay on the north and Portage Bay on the south. Demian Hills , located west of the very southern portion of Becharof Lake, is another area, and Gas Rocks, on the southern shore of Becharof Lake approximately midpoint of the lake, is the third. All three areas fall within the Cook Inlet Mesozoic Province. The anticlinal f eature between Becharof Lake and the Pacific Ocean (fig. 4), commonly called the Bear Creek anticline, can be located on t he U.S. Geological Survey topographi c map series on the Kar l uk quadrangle. The area, bounded by Puale Bay and Portage Bay, was the site of early drilling, probably on the basis of surface indications of hydrocarbons. During 1903-04, four wells were dri l led near the head of Oil Creek, which drains to the Pacific Ocean. All the wells were drilled near seep areas, but were unsuccessful in establishing commercial production . Dril l ing depths ranged from 728 feet to 1,542 feet. A 7,596-foot dry hole was drilled on The most recent wel l to be drilled in the pleted in 1959 as a 14,375-foot dry hole. the Bear Creek seeps . Salmon Creek during 1938 -40 (fig. 5). area was spudded in 1957 and com- This well was drilled upstream of Data regarding the wells drilled between Puale Bay and Portage Bay (Karluk quadrangle) are found in table 9. TABLE 9. -Wells drilled in Becharof Lake-Puale Bay area Com-Tota l Company Well Location1 Spudded pleted depth, Status feet J. H. Costello. No. 1 ..... NWl/4 sec 10, 1903 1903 728 Plugged and T 29 S, R 40 W. abandoned . Do ........... No. 2 ..... SEl/4 sec 10, 1904 1904 (2) Do. T 29 s, R 40 W. Humble Oil and Bear Cr eek 510 I s > 1,280 ' w 9/23/57 3/4/59 14,375 Do. Refining Co . 3 Unit of NE corner , No. 1. sec 36, T 29 S , R 41 W. Pacific Oil and No. 1 ..... SWl/4 sec 36, 1903 1904 1 ,421 Do. Commercial Co. T 28 S, R 40 w. Do ........... No. 2 ..... Sl/2 sec 2, 1904 1904 1,542 Do. T 29 S, R 40 W. Standard Oil Grammer 600 ' N, 2,050' w 7/17/38 3/30/40 7 ,596 Do. Co . of No . 1. of SE corner, California. sec 10, T 30 S , R 41 W. 1 . .;) Based on Seward meridian. 2 Unknown. Now Exxon Co ., U.S .A . 38 T. 29S. T. 30S. -<> T.30S. :_,,> T. 31 S. "'>"'a-<" . . .• . .' + LEGEND SCS -Salmon Creek Sample BCS --Beor Cr eek Sompl e RCS --Rex Creek Sample OCS-Oil Creek Sample FIGURE 4. • Bear Creek anticline sampl ing locations (adapted from U.S. Geo log ical Survey map of the Karluk quadrong le ). FIGURE 5. • Ke julik River gos sampling locations (adopted from U.S. Geologica l Survey mop of the Ko rl uk quodrong le), 40 R. 38W. 'A L. f pUI B A y ,I . . .. ' l •• • •• t ••• . • .+ R. 38W. •• • I "" ..... ,o;.·. I.• .,-' r· (~ ,.. R. 37 w . LEGEND BAY-Bay Sample +cK-WS ...-Cape Kekurnoi -West Sample CK -NS -Cape Kekurnai -North Sample R. 37 W. T. 28 S. T.29S. FIGURE 6. -Cape Kekurnoi sampling locations (adapted from U.S. Geological Survey map of the Karluk quad rang le), 41 The U.S. Geological SurveyB references the oil and gas seeps in the area between Becharof Lake and Puale Bay as follows: "In the Kanatak district active oil and gas seeps and oil residues are found principally in two areas: southwest of Puale Bay in the vicinity of Oil Creek and on the Bear Creek - Salmon Creek anticline ... The flow of oil at the largest of these seeps was estimated in 1921 to be about half a barrel per day." Becharof Lake -Kejulik River A significant gas seep was located and sampled on the East Fork of the Kejulik River (fig. 5). This seep is notable because the analysis indicates a relatively high Btu value. The seep itself was located on the north side of the main stream, a 6-foot -diameter water pool with gas emanating vigorously. The gas would flame upon ignition. Samples of the gas and water were obtained from this location, a nd an additional water sample was obtained near the junc- tion of the East Fork and mainstream Kejulik River . The analyses for t hese samples are found in tables 10 -1 2 . The peninsu l a between Puale Bay and Al inchak Bay (fig. 6) h as a number of unnamed, short-length creeks. Several of the creeks were investigated in an attempt to establish seep locations . Definite seeps were not observed, but areas suspected of being seeps were found. Samples were taken f r om three creeks and analyses are given in table 13 . Other creeks draining directly into Puale Bay were reconnoitered, but visual inspection revealed no seeps on Helen Creek , Portage Creek, Te r esa Creek, Dry Creek, Train Creek, and Katie Creek. According t o the analyses, water from these creeks did not contain significant amounts of oil . Oil Creek-Puale Bay The oil and gas seeps at the head of Oil Creek (fig. 4) are the most prolific of those observed on the Al aska Peninsula . Oil a nd gas issue from two separate springs situated at the foot of a small knoll on the southern side of Oil Creek. 8 Work cited in footno t e 5 . 42 TABLE 10. -Analysis of gas from East Fork, Kejulik River Sample from: Well ---Strea m Seep X Other ---- Area Becharof Lake Sampled by U.S. Bureau of Mines Location SW 1/4, Sec. 35, T26S, Date sampled 6/74 R38W (SM) -------- Quadrangle Karluk ~~~----- Pertinent data regarding sample: Sample obtained from vigorous gas seep near the headwaters of East Fork of Kejulik River , south of Katmai National Monument. Analysis: Performed by U.S. Bureau of Mines ---------------------- Prov ided by --------------------~-~ Special results : Analysis: Methane 73 .6 % Normal Pentane 0.0 % Oxygen 0.0 % Ethane Trace % Isopentane 0.0 % Argon 0.5 % Propane Trace % Cyclopentane 0.0 % Hydrogen 0.0 % Norma 1 Butane 0.0 % Hexanes Plus 0.0 % H2S 0.0 % Isobutane 0.0 % Nitrogen 25.8 % C02 Trace % Helium 0 .0\ Total 99.9 % Calculated gross Btu/cu.ft., dry at 60°F. and 30" mercury 746 Specif i c Gravity 0.664 TABLE 11 .-Analysis of water from gas seep on East Fork, Kejulik River Sample from: Well ---Stream ---Seep X Other --- Area Becharof Lake Location SW 1/4, Sec. 35 , T26S, R38W (SM) Sampled by U.S. Bureau of Mines Date sampled 6/74 --"'------- Quadrangle Karluk -------- Pertinent data regarding sample: Sample obta ined from vigorous ga~ seep near the headwaters of the East Fork of Kejulik River. Analysis: Performed by Commercial firm Provided by ________________ _ Special results: Oil content, mg/l---0 .1 Analysis: Cations Mg/liter Meg/liter Anions Sodium 48 Potassium Trace Magnesium Trace Ca 1cium 4 Iron "iota l Cation 2.08 0.20 2.28 Carbonate Bi carbonate Sulfate Sulfide Chloride Hydroxide Tota 1 Anion Total dissolved solids 9 Mg/liter 127 Observed pH 7.5 Mg/liter Meg/liter 0 67 1.10 Trace 42 1.18 2.28 Specific resistance at 68°F 54. 7 ohm meters 43 44 TABLE 12.-Analysis of water from Kejulik River Sample from: Wel l Stream X Seep Other __ _ --- Area Becharof Lake LocationSW 1/4, Sec. 30 , T26S, R38W (SM) Quadrangl e_Ka_r_l_u_k ____ _ Sampled by U.S. Bureau of Mines Date samp 1 ed---'6/...;..7_4 _____ _ Pertinent data regarding sample: Sample obtained from East Fork of Kejulik River near its juncture with the main- stream Kejulik River. Ana 1 ys i s : Performed by___;,.C.;;...om...;..m.;_;;e...;..r...;..c ..:..i a::....l;__f...;..i r...;..m;,;__ ________ _ Provided by ------------------ Specia 1 results: Oil content, mg/1--~o .1 Analysis: Cations Mg/liter Meg/liter Anions Mg/ 1 i ter Meg/liter Sodium 13 0.56 Carbonate 0 Potassium Trace Bi carbonate 24 0.39 Magnesium Trace Sulfate Trace Calcium Trace Sulfide Iron Chloride 6 0 . 17 Hydroxide Total Cation 0 .56 Total Anion 0.56 Total dissolved so l ids, Mg/liter 31 Observed pH 6.9 S~ecific resistance at ~°F 239 ohm meters TABLE 13.-Analyses of water from Cape Kekurnoi area Sample from: Well Stream Seep X Other --- Area Pua le Bay Location SE 1/4, Sec. 20, T28S, R38W (SM) Quadrangle Karluk ~~-'-'------ ---------- Sampled by U.S. Bureau of Mines Date sampled 6/73 -------- Pertinent data regarding sample: Sample taken from small seep at head of creek with mouth entering Puale Bay near VABM-Bay. Analysis: Performed by Commercial firm ~---------------- Provided by -----------------~ Special results: Oil content, mg/l ---44 .7 Analysis: Cations Mg/liter Meg/liter Anions Mg/liter Meg/liter Sodium l 28 5.55 Carbonate 0 Potassium 2 0.05 Bi carbonate 305 5.00 Magnesium 6 0.49 Sul fate 30 0.62 Ca lei um 2 0 .80 Sulfide Iron Chloride 45 1 . 27 Hydroxide Tota 1 Cation 6.89 Total Anion 6.89 Total dissolved solids, Mg/liter 363 Observed pH 7.2 Specific resistance at 68 Of 30.0 ohm meters 45 46 TABLE 13. -Analyses of water from Cape Kekurnoi area--Continued Sample from: Well ---Stream __ x_ Seep __ _ Other --- Area Puale Bay Sampled by U.S . Bureau of Mines Location Sec. 35 , T28S, R37W (SM) Date samp led 6/74 -------- Quadrangle Karluk -------- Pertinent data regarding sample: Sample obtained from mouth of Creek having mouth j ust west of Cape Kekurnoi . Analysis: Performed by Commercial firm ~---------------~ Provided by--------------~~~ Special results: Oil content, mg/1---0.l Analysis: Cations Mg/liter Meg/liter Anions Mg/liter Meg/liter Sodium 21 0 .90 Carbonate 0 Potassium 1 0.03 Bi carbonate 39 0.64 Magnesium Trace Sul fate 8. 0 .1 7 Ca lei um 6 0 .30 Sulfide Iron Chloride 15 0.42 Hydroxide Total Cation 1.23 Total Anion 1.23 Total dissolved solids~ Mg/liter 70 Observed pH 7.4 Specific resistance at 68 OF 87.0 ohm meters TABLE 13. -Analyses of water from Cape Kekurnoi area--Continued Sample from: Well Stream Seep X Other --- Area Pua 1 e Bay Location NE 1/4, Sec. 21, T28S, R37W (SM} Quadrangle Karluk -------- ------ Sampled by U.S . Bureau of Mines Date sampled 6/73 -------- Pertinent data regarding sample: Sample obtained from suspected seep at head of creek which drains into Shelikof Strait about 1 mile north of Analysis: Performed by Commercial firm Cape Kekurnoi. Provided by ----------------- Special results: Oi l content, mg/1---33 .l Analysis: Cations Mg/liter Meq/l iter Anions Mg/ 1 i ter Meg/liter Sodium 221 9.63 Carbonate 0 Potassium 5 0 .13 Bi ca rbo na te 476 7 .81 Magnesium 5 0.4l Su1fa te 10 0. 21 Ca lei um 1 0.05 Sulfide Iron Chloride 78 2.20 Hydroxide Total Cation 10.22 Total Anion 10.22 Total dissolved solids, Mg/liter 555 Observed pH 6.3 Specific resistance at 68 OF 20.0 ohm meters 47 48 Seep A (fig. 4) was found in a water-oil pond about 18 inches in diameter and 5 inches deep, which bubbled intermittently but constantly. A frothy oil covered the seep area. The water and oil from this seep flow into a pond about 20 feet by 40 ~eet. The base and sides of this pond are covered by a tarlike substance where the oil has settled out over a number of years. The water and oil from the seep run over this substance and continue on toward Oil Creek. It appears that the heavier fractions have filtered out throughout the years, aided by the vegetation; an area approximately 350 feet wide and 800 feet long is covered by a bitumen deposit ranging from 6 inches to 13 inches thick. This bitumen is also aided in deposition by seep B. The deposit is weathered dry on the surface, but the substance displays a moist, malleable, asphalt-type characteristic when penetrated. One strikingly noticeable aspect of this bitumen deposit was that the grass vegetation grow- ing in the bitumen exhibited greener, more consistent growth than that of the surrounding countryside. Gas bubbling up through the seep burst into flame when lit with a match. The flame was sustained as long as the emission was constant. Seep B (fig. 4) was located approximately 45 feet west of seep A. The seep was not as readily discernable as seep A, since it lacked the physical activity of a bubbling spring. The head of the seep area is a series of approximately five small water trickles that cover an area with a radius of 4 feet and collect at one point. The water-collection pond widens into a pool and then narrows down once more into a small running creek about 18 inches wide and 8 inches deep. Flow of water in this creek at the time of observa- tion was estimated to be about 6 gal/min. The oil stained the side of the creekbed and adjacent vegetation, and what appeared to be a paraffin was evi- dent in areas of slow running water and where twigs and branches of small willows hung across the creek. At the time of observation of the seeps on Oil Creek, most of the snow had melted, although snow banks still persisted in cut banks and hollows. Little rainfall had been received. However, it is evident that the flow of the springs and creeks carrying bitumen would vary markedly depending upon runoff from snow melt and rain. This is illustrated by the fact that the bitumen was spread high about and along the small creek banks and on the vegetation. Whether the amount of seep oil emerging from the springs is influenced by variance in precipitation was not determined. Two of the four wells drilled on Oil Creek were found by locating the rusting remains of drilling equipment. Although mounds of the tarlike sub- stance (undoubtedly used as boiler fuel) were found near the well locations, no active seeps were found nearby, nor were leaks detected from the wells. Of significance is the minimal amount of oil that seemed to be in the water in relation to the large amount that seemed to be issuing from the seeps. Analyses of the gas, oil, water, and bitumen from the Oil Creek seeps are given in tables 14-20. TABLE 14.-Analysis of gas from Oil Creek seep A Sample from: Stream Seep X Other Well __ _ ------- Area Oil Creek Sampled by U.S . Bureau of Mines Location NE 1/4, Sec. 10 , T29S, Date sampled_-"""'6/-'7-'4 _____ _ R40W (SM) Quad rang 1 e__,K.,,.a..,_r_._l =u k_,,_ ___ _ Pertinent data regarding sample: Sample obtained at Seep A at head of Oil Creek. Analysis: Performed by U.S. Bureau of Mines ------------------- Provided by ----------------~-- Special results: Analysis: Methane 91. 2 % Norma 1 Pentane 0.0 % Oxygen Trace % Ethane Trace % Isopentane 0.0 % Argon 0 . l % Propane Trace % Cyclopentane 0.0 % Hydrogen 0.0 % Normal Butane 0.0 % Hexanes Plus 0.0 % H2S 0.0 % Isobutane 0.0 % Nitrogen 6 .7 % C02 1.9 % Helium Trace % Tota 1 99.9 % Calculated gross Btu/cu.ft ., dry at 60°F. and 30" mercury 924 Specific Gravity 0.601 49 50 TABLE 15.-Analysis of oil from Oil Creek seep A Sample From: Well ---Stream ---seep __ x_ Other --- Area Qi l Creek Location NE 1/4, Sec. 10, T29S, R40W (SM) Sampled by U.S. Bureau of Mines Date Sampled 6/73 ~-------- Quad rang le ~K ... a .... r ..... l u ..... k"'------- Pe rtinent Data Regarding Sample: Sample obtained from Seep A at the head of Oil Creek. Analysis: Performed by Commercial firm General Characteristics: Specific gravity@ 60/60 °F. A.P .I . gravity@ 60°F . Saybolt Universal Viscosity @ 70°F., seconds Saybolt Universal Viscosity @ 100°F., seconds B. s. and water, 7. by volume Pour point, °F. Total sulphur, % by weight Recovery, % Temperature, IBP 5 10 15 20 25 30 35 40 45 50 Approximate Recovery 300° E.P. gasoline, % 392° E.P. gasoline, % 500° E.P. distillate, % 180 242 292 3~0 382 425 46 8 502 53~ 552 ·55g Distillation OF. Recovery, 55 60 65 70 75 80 85 90 95 E .P. 11.0 21.0 15 .0 % 0.9616 15.7 Not determined Not determined 73 Not determined o.ss Tempera tu re, oF. 57§ 58Q Recovery, % Residue, % Loss, 7. 61.0 39 .0 0 TABLE 16.-Analysis of water from Oil Creek seep A Sample from: Well Stream X Seep Other --- Area Oil Creek Location NE 1/4, Sec. 10, T29S, R40W (SM) Quadrangle Karluk ---.---...--=.; ____ _ --- Sampled by U.S . Bureau of Mines Date sampled 6/73 -------- Pertinent data regarding sample: Sample obtained in drainage creek about 100 yards downstream from Oil Seep A at head of Oil Creek . Analysis: Performed by Corrmercial firm ---------------~ Provided by ----------------- Special results: Oil content, mg/1---3.3 Analysis: Cations Mg/liter Meg/liter Anions Mg/liter Meq/l iter Sodium 26 1.11 Carbonate 0 Potassium Trace Bicarbonate 37 0 .61 Magnesium Trace Sul fate 5 0 .10 Ca lei um 2 0.08 Sulfide Iron Chloride 17 0.48 Hydroxide Total Cation 1.19 Total Anion 1. 19 Total dissolved solids, Mg/1 iter 68 Observed pH 6.3 Specific resistance at 68 °F 195.0 ohm meters 51 52 TABLE 17.-Analysis of oil from Oil Creek seep B Sample From: Well ---Stream Area Oi 1 Creek Loe a tion NE 1I4, Sec. 10, T29S, R40W (SM) Quadrangle Karluk _...;.-="'--'-""'""-'------- ---Seep _x __ Other --- Sampled by U.S. Bureau of ~ines Date Sampled 6/73 -------- Pertinent Data Regarding Sample: Sample obtained from prominent trickle stream making up Seep B at head of Oil Creek. Analysis: Performed by Commercial firm -------------------- Provided by -------------------- General Characteristics: Specific gravity @ 60/60 °F. A.P.l. gravity@ 60°F. Saybolt Universal Viscosity @ 70°F., seconds Saybolt Universal Viscosity @ 100°F., seconds B. s. and water, % by volume Pour point, °F. Total sulphur , % by weight Distillation 0 .9254 21.4 Not determined Not determined 73 Not determined 0.21 Recovery, % IBP T t oF . enpera ure, 456 Recovery, % 55 T t OF. empera ure, 5 10 15 20 25 30 35 40 45 so Approx1.mate Recovery 300° E.P . gasoline, 4 392° E.P. gasoline, % 500° E.P . distillate, % 504 538 542 546 548 550 60 65 70 75 80 85 90 95 E .P . 0 0 4.5 Recovery, % Residue, % Loss, 7. 31.0 69.0 0.0 TABLE 18.-Analysis of water from Oi l Creek seep B Stream X Sample from: Well ---Seep __ _ Other --- Are a Oi 1 Creek S~mpled by U.S. Bureau of Mines Location NE 1/4, Sec. 10, T29S , R40W (SM) Date samp 1 ed._6_1_7_3 ____ _ Quadrangl e_:....;.:Ka::...:.r...:.1.:;uk~---- Pertinent data regarding samp le : Sample obtained from creek about 300 yards downstream from Seep B at head of Oil Creek. Analysis: Performed by Commercial finn ~_;,.;.. _____________ ___ Provided by ________________ _ Special results: Oil content, mg/1 ---3.6 Analysis: Cations Mg/liter Meg/liter An io ns Mg/liter Meg/liter Sodium 26 1. 12 Carbonate 0 Potassium Trace Bica rb o na te 31 0. 51 Magnesium Trace Sul fate 10 0 . 21 Ca lei um l 0.05 Sulfide Iron Chloride 16 0.45 Hydroxide Tota 1 Ca tion 1. 17 Total Anion 1. 17 Total dissolved solids, Mg/liter 68 Observed pH 6.8 Specific resistance at 68 OF 220.0 ohm meters 53 54 TABLE 19. -Analyses of water from Oil Creek Sample from: Well __ _ Stream X Seep Other --- Area Qi 1 Creek Location NE 1/4, Sec . 10, T29S, R40W {SM) Quadrangl e_K_ar_l_u_k ____ _ Sampled by U.S. Bureau of Mines Date sampled 6/74 -------- Pertinent data regarding sample: Sample obtained about 50 feet below juncture of drainage from Seep A and Seep B at head of Oil Creek. Analysis: Performed by Commercial firm ~----------------------------- Provided by ~--------------------------- Special results: Oil content, mg/1---0.2 Analysis: Cations Mg/1 iter Meg/liter Anions Mg/1 i ter Meg/liter Sodium 37 1.61 Carbonate 0 Potassium Trace Bicarbonate 67 1.10 Magnesium Trace Sulfate Trace Ca lei um 0.05 Sulfide Iron Chloride 20 0.56 Hydroxide Total Cation 1.66 Total Anion 1.66 Total dissolved solids, Mg/1 iter 91 Observed pH 6.9 Specific resistance at 68 OF 124.0 ohm meters TABLE 19. -Analyses of water from Oil Creek--Continued Sample from: Well Stream X Seep Other --- Area SE 1/4, Sec . 25, T29S, R40W (SM) Location Karl uk ----------- Quadrangle Karluk -------- Pertinent data regarding sample: --------- Sampled by U.S. Bureau of Mines Date samp l ed_6 ... L ...... Z ...... 4 _____ _ Sample obtained at mouth of Oil Creek. Analysis: Performed by Commercial firm Provided by ----------------~ Special results: Oil content, mg/1---< 0.1 Analysis: Cations Mg/liter Meg/liter Anions Mg/liter Meg/liter Sodium 18 0.78 Carbonate 0 Potassium Trace Bi carbonate 24 0.39 Magnesium Trace Sul fate Trace Ca lei um Trace Sulfide Iron Chloride 14 0.39 Hydroxide Total Cation 0.78 Total Anion 0.78 Total dissolved solids, Mg/liter __ 44 __ Observed pH 6:7 Specific resistance at 68 °F 164.0 ohm meters 55 56 TABLE 20. -Analyses of oil from Oil Creek bitumen Seep _x __ Other ---Sample From: Well ---Stream __ _ Area Oil Creek Location NE 1/4, Sec. 10, T29S, R40W (SM) Quadrangle Karluk --'"";;:..;...;--=...;-------~ Sampled byU.S. Bureau of Mines Date Sampled 6/73 ~-------~- Pertinent Data Regarding Sample: Sample obtained from bitumen deposit buildup near Seep A. Analysis: Performed by U.S. Bureau of Mines ---~-----------------------------~-- General Characteristics: Specific gravity@ 60/60 °F. A.P.I. gravity@ 60°F. Saybolt Universal Viscosity @ 70°F., seconds Saybolt Universal Viscosity @ 100°F., seconds B. s. and water> % by volume Pour point, °F. Total sulphur, % by weight Nitrogen Dis t:illa tion 0.977 13. 3 - Not determined Not determined Not determined Not determined 0 .12 0 .27 Recovery, % IBP T t oF. empera ure, Recovery, % 55 T t oF. empera ure, 5 10 15 20 25 30 35 40 45 50 ~ Approximate Recovery (\ 300° E.P. gasoline, % 392° E.P. gasoline, % 500° E.P. distillate, 7. 60 65 70 75 80 85 90 95 E~P. Recovery, % Residue, % Loss, i. TABLE 20. -Analyses of oil from Oil Creek bitumen--Continued (See pertinent Sample From: Well Stream Seep Other data) Area Oil Creek Location SE l/4 , Sec. 10, T29S, R40W (SM) Quadrangle ~~~~~~~-- Sampled by U.S. Bureau of Mines Date Sampled -~6'-17:...:3~----- 57 Pe r tinent Data Regarding Sample : Sample obtained from mound ~uspected o~ being transported to well site from.main bitumen deposit for purpose of fueling boiler . Analysis: Perfo~d by U.S. Bureau of Mines .....;::,.~~~....;;.,;,:---------~~-~-~ General Charac teristics: Specific g ravity @ 60/60 °F. A.P.I. gravity@ 60°F. Saybolt Unive rsal Viscosity @ Saybo lt Universal Viscosity @ B. s. and water, % by volume Pour point, °F. Total sulphur, % by weight Nitrogen,· % 70°F., seconds 100°F., seconds Distillation 1 .008 8 .9 Not determined Not determined Not determined Not determined 0.24 0 .27 Recovery, % IBP T t OF . empera ure, Recovery, % 55 T t OF. empera ure, 5 10 15 20 25 30 35 40 45 50 Approximate Recoverz 300° E.P. gasoline, % 392° E .P. gasoline, % 500° E.P. distillate, % 60 65 70 75 80 85 90 95 E .P. Recovery, % Residue, % Loss, 7. __ !·-~!!.~·----- T. 29S. LAVA ····· ... Feat ly I! IS i l I ~-------------------~ ': . ' ... Ml. Oemion Mt. Lu "''· : ~ .. 3i 3lf "' "' • • a< a< -~-::-~---~-.:;:.:;----------~;:/~~::.---- _/··· FIGURE 7. -Demian Hills sampling loca t ions (ada pt ed from U.S. Geologica l Survey map of the Ugashik quadrangle), + V1 00 59 Rex Creek-Puale Bay Although no noticeable oil or gas seeps were observed on any of the forks or mainstream of Rex Creek, a blue-sheened water seep was observed near the south fork of Rex Creek. This seep was sampled, a~d the creek was sampled near its mouth. Analyses from Rex Creek waters are found in table 21. All of the creeks affected by the seeps previously discussed drain into the Pacific Ocean, on the western Gulf of Alaska. Two creeks with oil and/or gas seeps drain westward into Becharof Lake. The occurrence of these seeps is probably controlled by the same geologic conditions. Bear Creek-Becharof Lake A gas seep was located on Bear Creek downstream from the landing strip that serviced the drilling operations of the Bear Creek No. 1 exploratory well drilled in 1957-59. The seep was vigorous and the bubbles emerging from the base of the water pool were sufficient to ignite a flame despite a moderately strong west wind. An oil seep was also located on Bear Creek (fig. 4). The seep covers an area of about 100 feet by 150 feet. There are two separate seep ponds about 60 feet apart. There was no indication that oil was actively being seeped to the surface, although oil scum floated on the surface of the water and clung to the grass along the seep drainage. Occasionally, gas bwbbles rose sporad- ically to the surface through the water. The analyses of the gas and fluids from the Bear Creek seeps are found in tables 22-25. At the time of observation, the abandoned well site was found to be in excellent condition, with no seep of any kind emitting from the plugged hole. Salmon Creek-Becharof Lake No active discernable oil or gas seeps were observed on Salmon Creek (fig. 4). However, a sample of gas was obtained from a pool of water sur- rounding the surface casing of a plugged and abandoned well near the head of Salmon Creek. The emerging gas bubbles would not ignite. The gas and water analyses are given in tables 26 -27. Demian Hills The Demian Hills area can be located on the U.S. Geological Survey topo- graphic map series on the Ugashik quadrangle. The western flank of Mount Demian also had early-day oil exploration. Between 1923 and 1926, five wells were drilled near the oil seeps between Ugashik Creek and Little Ugashik Creek. This area is often referred to as the Pearl Creek dome (fig. 7). Information regarding these wells is given in table 28. 60 TABLE 21.-Analyses of water from Rex Creek Sample from: Well Stream X Seep __ _ Other --- Area Rex Creek Location SE 1/4, Sec. 30, T29S, R40W (SM) Quadrangle Karl uk -------- ------ Sa mp 1 ed by __ u_. S_._B_ur_e_a_u_o_f_M_ines Date sampled --------6/73 Pertinent data regarding sample: Sample obtained near the head of the South Fork of Rex Creek Analysis: Performed by Commercial firm Provided by ________________ _ Special results: Oil content, mg/1---9.6 Analysis: Cations Mg/liter Meg/liter Anions Mg/ 1 i ter Meg/liter Sodium 22 0.94 Carbonate 0 Potassium 1 0.03 Bi carbonate 38 0.62 Magnesium 1 0.08 Sul fate Trace Ca lei um 2 0.08 Sulfide Iron Chloride 18 0. 51 Hydroxide Total Cation 1.13 Total Anion 1.13 Tota 1 dissolved solids, Mg/liter 63 Observed pH 6.5 Specific resistance at 68 Of 220.0 ohm meters TABLE 21. -Analyses of water from Rex Creek--Continued Sample from: Well Stream X Seep Other --- Area Rex Creek Lo cation NW 1/4, Sec. 21, T29S, R40W (SM) Quadrangl e_ ...... Ka .... r_..l .... u ..... k ___ _ ------ Sampled by U.S . Bureau of Mines Date sampled 6/73 -------- 61 Pertinent data regarding sample: Sample obtained about 1 mile upstream from mouth of Rex Creek. Analysis: Performed by Commercial firm Provided by ----------------- Special results: Oil content, mg/1---4.4 Analysis: Cations Mg/liter Meg/liter Anions Mg/liter Meg/liter Sodium 23 0.98 Carbonate 0 Potassium 0.03 Bi carbonate 43 QI Zl Magnesium 0.08 Sul fate 2 0.94 Calcium 0.05 Sulfide Iron Chloride 14 0.39 Hydroxide Tota 1 Cation 1.14 Total Anion 1.14 Total dissolved solids, Mg/liter 63 Observed pH 6.5 Specific resistance at 68 OF 140 .0 ohm meters 62 TABLE 22.-Analys i s of gas from Bear Creek gas seep Well Stream Other Sample from: ------Seep __ x_ ---- Area Becharof Lake Samp l ed by U.S . Bureau of Mines Location SW l / 4, Sec . 35 1 T29S, Date samp 1 ed __ 6...:../_7_4 _____ _ R41W (SM) Quadrangle Karluk -------- Pertinent data regarding sample: Samp le obtained from active gas seep on Bear Creek downstream from Bear Creek well drilling site. Analysis: Performed by U.S . Bureau of Mines ~-----~------------ Provided by --~---------------- Spec i a 1 results: Analysis: Methane 85 .3% Norma 1 Pentane 0.0 % Oxygen 0.0 % Ethane 0.0% Isopentane 0.0 % Argon 0.2 % Propane 0.13 Cyclopentane 0.0 % Hydrogen 0 .0 % Norma 1 Butane 0.03 Hexanes Plus 0 .0 % H2S 0.0 % Isobutane 0.0% Nitro gen 14.3 % C02 0. 1 % Helium 0.01% Total 100 .0 % Calculated gross Btu/cu . ft . , dry at 60°F. and 30" mercury 867 Spec if ic Gravity 0.622 TABLE 23.-Analyses of water from Bear Creek oil seep Well Stream x Other Sample from: ------Seep ------ Area Becha rof Lake Location NE 1/4, Sec. 34, T29S, R41W (SM) Quadrangle Karluk ----~--..;.. ____ _ Samp 1 ed by __ u_. s_. _B_ur_e_a_u_o_f_M_i nes Date sampled 6/7 3 -------- Pertinent data regarding sampl e : Sample obtained from pond area of dormant oil and gas seep on Bear Creek. Analysis: Performed by CorTTTiercial firm ------------------------------- Provided by -------------------------------- Special results: Oil content, mg/1---18 .l Analysis: Cations Mg/liter Meg/liter Anions Mg/liter Meg/liter Sodium 28 1. 21 Carbonate 0 Potassium 1 0.03 Bi carbonate 73 1.20 Magnesium 2 0 .16 Sulfate Trace Ca lei um 9 0.36 Sulfide Iron Chloride 20 0.56 Hydroxide Total Cation 1. 76 Total Anion 1. 76 Total dissolved so lids, Mg/liter 96 --- Observed pH 6.7 Specific resistance at 68 °F ohm meters ---95 63 64 TABLE 23. -Analyses of water from Bear Creek oil seep--Continued Sample from: Well ---Stream ---Seep ---Other_x __ Area Becharof Lake Sampled by U.S. Bureau of Mines LocationNE 1/4, Sec. 34, T29S, R41W (SM) Date samp 1 ed.__,;6:;.(./,...;..7..;;..3 ____ _ Qua dra ng l e._u.iKa"'"'r...r..l.u.11"-k ___ _ Pertinent data regarding sample: Sample obtained from small trickle stream which drains the seep area into Bear Creek. Analysis: Performed by_Co_m_m_e_r _c ,_· a_l_f_i r_m _________ _ Provided by ----------------- Special results: Oil content, mg/1 ---4.1 Analysis: Cations Mg/liter Meg/liter Anions Mg/liter Meg/liter Sodium 26 1.14 Carbonate 0 Potassium Trace Bi carbonate 50 0.82 Magnesium 0.08 Sul fate 5 0 .10 Ca lei um 3 0. 12 Sulfide Iron Chloride 15 0.42 Hydroxide Total Cation 1. 34 Total Anion 1. 34 Total dissolved solids, Mg/liter 75 --- Observed pH 7.2 Specific resistance at ~°F ohm meters ---170 .0 TABLE 24.-Analysis of oil from Bear Creek oil seep Sample From: Well ---Stream Area Becharof Lake Location NE 1/4, Sec. 34, T29S, R41W (SM) Quadrangle Karl uk ---------- Seep X ---Other ------ Sampled by U.S. Bureau of ~ines 6/73 Date Sampled -----~----- Pertinent Data Regarding Sample: Sample obtained from heavy tar-like substance clinging to vegetative debris floating on pond of seep area. Analysis: Commercial firm General Characteristics: Specific gravity@ 60/60 °F. A.P.I. gravity@ 60°F. Saybolt Universal Viscosity @ 70°F., seconds Saybolt Universal Viscosity @ 100°F., seconds B. s. and water, % by volume Pour point, °F. Total sulphur, % by weight Dis ti lla ti on 0.9705 14.3 Not determined Not determined 56 Nat determined 0.59 Recovery, % IBP T t OF. empera ure, 550 Recovery , % 55 T t oF. empera ure, s 10 15 20 25 30 35 40 45 50 Approximate Recovery 300° E.P. gasoline, % 392° E.P. gasoline, % 500° E.P. distillate, 7. 564 578 588 590 600 0 60 65 70 75 80 85 90 95 E .P. Recovery, % Residue, % Loss, % 25 .0 75.0 0 65 66 TABLE 25.-Analysis of water from Bear Creek Sample from: Well ---Stream ---x Seep __ _ Other Area Becharof Lake Location SE 1/4, Sec. 20, T29S, R41W (SM) Sampled by U.S. Bureau of Mines Date sampled 6/74 -------- Quadrangle Karluk -------- Pertinent data regarding sample: Sample obtained in Bear Creek about 4 miles upstream from Bear Creek mouth. Analysis: Performed by Commercial firm Provided by --------------------- Special results : Oil content, mg/1---0.l Analysis: Cations Mg/liter Meg/liter Anions Mg/liter Meq/1 iter Sodium 14 0.61 Carbonate 0 Potassium Trace Bicarbonate 24 0.39 Magnesium Trace Sul fate 2 0.04 Ca lei um 0.05 Sulfide Iron Chloride 8 0.23 Hydroxide Total Cation 0.66 Total Anion 0.66 Tota 1 dissolved solids, Mg/liter 37 Observed pH 6.8 Specific resistance at 68 Of 173 .0 ohm meters TABLE 26.-Analysis of gas from Salmon Creek gas seep See pertinent Sample from: Well ---Stream ---Seep Other data Area Becharof Lake-Salmon Creek Sampled by U.S. Bureau of Mines Location SE 1/4. Sec. 10. T30S, Date sampled __ 6_,_/_7_3 _____ _ R41W (SM) Quadrangle Karluk -------- Pertinent data reg a rd i ng samp 1 e : Samp 1 e obtained from poo 1 of water surrounding surface casing of abandoned exploratory well. Analysis: Performed by U.S. Bureau of Mines ~---------------------- Provided by ~------------------- Specia 1 results: Analysis: Methane 18.9 % Normal Pentane 0.0 % Oxygen 0.4 % Ethane 0.2 % Isopentane 0.0 % Argon Q,Q % Propane 0. l % Cyclopentane 0.0 % Hydrogen Q.Q % Norma 1 Butane 0.0 % Hexanes Plus 0.0 % H2S Q.Q % Isobutane 0.0 % Nitrogen 3.0 % C02 7Z ,J % Helium Q,Ql % Total 22.9 % Calculated gross Btu/cu. ft., dry at 60°F. and 30" mercury 198 Specific Gravity 1. 324 67 68 TA BLE 27.-Analysis of water from Salmon Creek gas seep See pertinent Sample from: Well Stream Seep Other data Area Becharof Lake-Salmon Creek Sampled by U.S. Bureau of Mines Location SE 1/4, Sec. 10, T30S, R4 1W (SM) Quadrangle Karluk -------- Date samp 1 ed_6_/_73 _____ _ Pertinent data regarding sample: Water sample obtained from pool of water surrounding surface casing of abandoned exploratory well. Analysis: Performed by_C_o_m_m_e_rc_i_a_l _f_i_r_m _________ _ Provided by ____________ __: ___ _ Special resu l ts: Oil content, mg/l ---7.6 Analysis: Cations Mg/liter Meg/liter Anions Mg/1 i ter Meq/l iter Sodium 116 5.03 Carbonate 0 Potassium · 3 0.08 Bi carbonate 183 3.00 Magnesium 5 0.41 Su l fate Trace Ca lei um 9 0.36 Sul fide Iron Ch loride 102 2.88 Hydroxide Total Cation 5.88 To.ta 1 Anion 5.88 Total dissolved solids, Mg/liter 325 · Observed pH 7.0 Specific resistance at 68 OF 25.0 ohm meters 69 TABLE 28. -Wel l s drilled in Demian Hills area Com-Total Company Well Location1 Spudded pleted depth, Status feet Standard Oil Lathrop SE1/4SE1/4 sec 17, 1923 1923 500 Plugged and Co. of No. 1. T 29 S, R 43 w. abandoned. California. Do ........... Lee 1,600' E of SW 3/19/23 1/16/26 5,034 Do. No . 1. corner, sec 20, T 29 S, R 43 W. Do ........•.. McNally 2 ,000 I S > 500 ' E 1925 1925 510 Do. No. 1. of NW corner, sec 29, T 29 S, R 43 W. Tidewater Assa-Alaska 800' N of SW ciated Oil Co. Well corner, sec 20, 1/18/23 1/16/26 3 ,033 Do . No. 1. T 29 S, R 43 W. Do ........... Finnegan 1, 854 I S' 1, 074 I w 4/6/23 6/30/23 560 Do. No . 1. of NE corner, sec 30, T 29 S, R 43 W. lBased on Seward meridian. The old oil exploration camp on the west flank of Mount Demian was checked for active oil seeps. None were found. Several mounds of a tarlike substance were found near the remains of the drilling equipment . Since no other evidence of oil seeps were discovered, it was surmised that the bitumen was transported from other areas, perhaps the Oil Creek seeps to the east, and used as boiler fuel. Analysis of water taken in and near the Demian Hills camp and analysis of a gas seep found west of Demian Hills camp are found in tables 29-30. Gas Rocks Gas Rocks is located on the south shore of Becharof Lake (fig. 8). The area can be found in the U.S. Geological Survey topographic map series on the Ugashik quadrangle. This area has gas seeps emanating underwater offshore. No wells have been dril l ed near the area. An interesting seep area was observed just offshore of Gas Rocks on the south shore of Becharof Lake . A vigorous natural gas seep was observed at this location, obviously the reason for the geographic nomenclature of the area. Numerous fractures or cracks can be seen on the lake bottom in an area the size of which could not be definitely determined because of wave and wind action on the water. Bubbles are emitted continuously, and can even be observed on a relatively windy day. It is difficult to determine the areal extent of the seep area . Local residents claim that in the winter, the bubbles of gas keep the area free of ice. A sample was obtained and the analysis is found in table 31. 70 TABLE 29.-Analyses of water from Demian Hills area Well Stream Other X Sample from: ------Seep ------ Area Mt. Demian Location NE 1/4, Sec. 29, T29S, R43W (SM) Quadrangle Ugashik -------- Sampled by U.S . Bureau of Mines 6/73 Date sampled -------- Pertinent data regarding sample: Sample obtained from spring area about 500 yards NW of camp. Analysis: Performed by Commercial firm Provided by ________________ _ Special results: Oil content, rng/1---2 3.3 Analysis: Ca tions Mg /liter Meg/liter Anions Sod ium 166 Potassium 3 Magnesium 3 Calcium 1 Iron Tota 1 Cation 7.22 0.08 0.25 0.05 7.60 Carbonate Bicarbonate Sulfate Sulfide Chloride Hydroxide Tota 1 Anion Total dissolved solids, Mg/liter 423 Obse rved pH 7. 2 Mg/liter Meg/liter 0 317 5.20 34 0. 71 60 1.69 7.60 Specific resistance at 68 °F 31.0 ohm meters TABLE 29. -Analyses of water from Demian Hills area--Continued Sample from: Well Stream X Seep __ _ Other --- Area Mt. Demian Location SW 1/4, Sec . 20, T29S, R43W (SM) Quadrang 1 e_Ug~a.;..;;s..;..h_i k ____ _ --- Samp led ~Y U.S . Bureau of Mines Date sam pled 6/73 -------- Pertinent data regarding sample: Sample obtained from spring seep area feeding into Little Ugashik Creek. Analysis: Performed by__...c ..... omwim=e ..... r_,,.c~i a..:....l.:.._.:.f...!,.i .:...:rm.,:.:..._ ________ _ Provided by -------------------- Special results: Oil content, mg/1---3.1 Analysis: Cations Mg/l iter Meg/liter Anions Mg/liter Meg/liter Sodium 25 1.08 Carbonate 0 Potassium 1 0 .03 Bicarbonate 43 0. 71 Magnesium 0.08 Sul fate 2 0.04 Ca lei um 3 0 .12 Sulfide Iron Chloride 20 0.56 Hydroxide Total Cat ion 1. 31 Total Anion 1. 31 Total dissolved solids, Mg/liter 73 --- Observed pH 6.5 Specific resistance at 68°F ohm meters ---170 .0 71 72 TABLE 29. -Analyses of water from Demian Hills area--Continued Stream X Sample from: Well ---Seep ---Other --- Area Mt. Demian Sampled by U.S. Bureau of Mines Locatio nSec. 30, T29S, R43W (SM) Date sampled 6/74 -------- Quadrangle Ugas hi k -------- Pertinent data regarding sample: Sample obtained in Ugashik Creek below Demian Oil camp . Analysis: Performed by Commercial firm Provided by ________________ _ Special results: Oil content, mg/1---0.1 Analysis: Cations Mg/liter Meg /liter Anions Mg/liter Meg/liter Sodium 12 0.54 Carbonate 0 Potassium Trace Bicarbonate 21 0 .34 Magnesium Trace Su l fate Trace Ca lei um Trace Sulfide Iron Chloride 7 0 .20 Hydroxide Total Cation 0. 54 Total Anion 0. 54 Total dissolved solids , Mg/liter 29 --- Observed pH 6.7 Specific resistance at ~°F 394 .0 ohm meters --- 73 TABLE 29. -Analyses of water from Demian Hills area--Continued Sample from: We11 ---Stream X Seep __ _ Other --- Area Mt. Demian Sampled by U.S. Bureau of Mines Location Sec. 24, T29S, R44~J (SM) Date sampled _ __.;6:...:..../...;_7_4 ____ _ Quadrangle Ugashi k ~-=-------- Pertinent data regarding sample: Sample obtained about 1 ,000 feet below fork of Ugashik and Blue Creeks. Analysis: Perf armed by Commerci a 1 firm Provided by ________________ _ Special results: Oil content, mg/1---0.1 Analysis: Cations Mg/liter Meg/liter Anions Sodium 44 Potassium Trace Magnesium Trace Ca lei um Iron Total Cation 1. 91 0.05 1.96 Carbonate Bi carbonate Sulfate Sulfide Chloride Hydroxide Tota 1 Anion Total dissolved solids, Mg/liter 113 Observed pH 6. 5 Mg/liter Meg/liter 0 26 0.43 2 0.04 53 1.49 1.96 Specific resistance at 68 °f 59 · 5 ohm meters 74 TABLE 30.-Analysis of gas from Demian Hills area Sample from: Well ---Stream ---Seep __ X_ Other ___ _ Area Mt. Demian Sampled by U.S. Bureau of Mines Location Sec . 13, T29S , R44W (SM) Date sampled 6/74 ---------- Quadra ng 1 e Ugashi ~~--=---· _ n--=- Perti nent data regarding sample: Sample obtained about 1/4 mile west of Blue Creek. Analysis: Performed by U.S. Bureau of Mines ------------------~ Provided by ------------------~ Special results: Analysis: Methane 7.2 % Norma 1 Pentane 0.0 % Oxygen 1.8 % Ethane 9.0 % Isopentane 0.0 % Argon 0.3 % Propane Trace : Cyclopentane 0.0 % Hydrogen 0.0 % Norma 1 Butane 0.0 % Hexanes Plus 0.0 % H2S 0.0 % Isobutane 0.0 % Nitrogen 20.6 % C02 70. 1 % Helium Trace % Total 100.0 % Calculated gross Btu/cu . ft . , dry at 60°F. and 30 11 mercury 73 Specific Gravity 1. 335 TABLE 31 . -Analysis ·of gas from Gas Rocks seep Well Stream Other Sample from: Seep---'X-'------- Area Gas Rocks , Becharof Lake LocationN~J 1/4 , Sec. 9, T27S, R44W (SM) Quadra ng 1 e_U..._ga_s_h_i _k ____ _ Sampled by U.S. Bureau of Mines Date sampled 6/74 -"----------~ Pertinent data regarding sample: Sample obtained from vigorous wide - spread seep offshore from Gas Rocks in Becharof Lake. Analysis: Performed by U.S. Bureau of Mines --"--'--~~~-'---'-----'----------~ Provided by ------------------~ Special results: Analysis: Methane 0. 1 % Norma 1 Pentane 0.0 % Oxygen 3.0 % Ethane Q.O % Isopentane 0.0 % Argon 0.2 % Propane Trace % Cyclopentane 0.0 % Hydrogen 0.0 % Normal Butane 0 .0 % Hexanes Plus 0.0 % H2S 0.0 % Isobutane 0.0 % Nitrogen 12.3 % C02 84 .5 % Helium Trace % Total 100 .1 % Calculated gross Btu/cu . ft . , dry at 60°F. and 30 " mercury 1. Specific Gravity 1. 447 75 :-0 <P:' '1' I I I I I ' ~z-=· SI ... .. ... ---Gas Rocks Seep Area -tso' 0 ;··· .. 0 ~LAV ··~. c.-. •. . . . : ~v~ ~-------------r=-~~~~-t-t--~~~rl::::::=lr--~~~~~f-~~~~-"':"-t::-~~~~~-;.--LJ'~-t~-r-r-~~-r~-t~~~-~28t. FIGURE 8. -Gos Rocks. 77 OBSERVATIONS Of the areas investigated for oil and gas seeps on the Alaska Peninsula, only the seeps at the head of Oil Creek between the Pacific Ocean and Becharof Lake were active enough to be deemed significant. The seeps found on the creeks of the Iniskin Peninsula probably are active, as evidenced by fresh oil floating on seep ponds and a continual rainbow sheen being swept into the drainage creek, Well Creek. However, there was no visual sign , such as gas bubbling or a fresh froth floa ting on the ponds . Although bitumen content in some analyses ran quite high at the site of the seep , analyses of the water at the mouth of the creeks draining s eeps did n ot i ndicate a high degree of bitumen being carried to the terminal water; that is, Pacific Ocean, Becharof Lake, etc. No oil was found on the beach of Puale Bay . Lus h, green growth at seep sites often obscured the seep itself. In particular, the growth of grass through and on top of the asphalt deposit at Oil Creek was a stark and colorful contradiction to the barren surroundings . No attemp t was made to determine whether the resultant g r owth on or near seeps was because of or in spite of the bitumen escaping. 78 APPENDIX . --METHOD OF DETERMINING AMOUNT OF OIL IN WATER 1 Preparation of sample: Place the sample, usually 1,000 ml, in a sepa- ratory funnel of sufficient size to allow the addition of acid and solvent while still leaving space for proper agitation. Acidify the sample with 5 ml sulfuric acid per liter of sample. Extraction with organic solvent:2 Rinse the sample bottle carefully with 15 ml organic solvent and add the solvent washings to the separatory funnel. Add an additional 25 ml solvent to the separatory funnel; shake vigorously for 2 min. Allow the organic layer to separate. Withdraw the aqueous portion of the sample into a clean container and transfer the solvent layer into a clean, tared distilling flask capable of holding at least three volumes of solvent. If a clear solvent layer cannot be obtained, filter the solvent layer into the tared distilling flask through a funnel containing a solvent-moistened Whatman No. 403 (or equivalent) filter paper. Use as small a funnel and filter paper as practical. After all the solvent from the two extractions and the final rinsing have been added, wash down the funnel and filter paper twice with fresh 5-ml increments of solvent. Return the sample to the separatory funnel and rinse the container with 15 ml solvent. Add the solvent washings and an additional 25 ml solvent to the separatory funnel, and agitate for another 2 min . Allow the solvent layer to separate, and discard the aqueous phase . Add the organic extract to the tared distilling flask, and rinse the separa - tory funnel with 20 ml solvent. Add the solvent washings to the tared dis- tilling flask. Solvent removal: Distill off all but approximately 10 ml of the solvent extract by a water bath or electric heating mantle, observing all necessary safety precautions and keeping the heat source at the proper boiling point . Disconnect the condenser an<l boil off the remaining solvent from the tared flask at the same temperature. Dry on a water or steam bath. When dry, lay the flask on its side to facilitate the removal of solvent vapor. Introduce approximately three volumes of dry illuminating gas into the flask to displace the solvent vapor. Cool in a desiccator for 30 min and weigh. Calculation: If the organic solvent used is known to be free of residue, the gain in weight of the tared distilling flask is mainly due to oil and grease. The total gain in weight, A, of the tared flask less the calculated residue, B, f r om the solvent, as determined by the distillation or evaporation of a measured quantity, indicates the amount of oil or grease in the water sample: . (A -B) X l, 000 mg/l oil or grease = 1 1 . m samp e lAmerican Public Health Association. Standard Methods for the Examination of Water and Wastewater. New York, 13th ed ., 1971, 874 pp . 2 Solvent used was trichlorotrifluoro ethane. 3 Reference to specific trade names is made for identification only and does not imply endorsement by the Bureau of Mines. INT.-BU.OF MINES,P G11.,PA. 210 13 <>U.S. GOVERNMENT PRINTING OFFICE: 197&-603-7$5/89 3340000001885W IIII i{I II!II� II! II IIS II III! II II II I II II Juneau Mineral Info Center OIL AND GAS EXPLORATION ON THE INISKIN PENINSULA, ALASKA By Donald P. Blasko Alaska Field Operation Center Anchorage, Alaska *****************************Open File Report 69-76 UNITED STATES DEPARTMENT OF THE INTERIOR Thomas S. Kleppe, Secretary BUREAU OF MINES Thomas V. Falkie, Director (09--2(0 CONTENTS ILLUSTRATIONS Fi Index map of Alaska . . . . . . . . . . . . . . . . . . . . . 4 2. Iniskin Peninsula, Alaska . . . . . . . . . . . . . . . . . . 10 TABLES 1. Wells drilled on the Iniskin Peninsula. . . . . . . . . . . . 7 2. Analysis of gas from Bowser Creek well. . . . . . . . . . . . 12 Juneau Mineral Information Ctr. Bureau of Land Management 100 Savikko Road, Mayflower Is Douglas, AK 99824 i Page Abstract . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Land status . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Geologic potential . . . . . . . . . . . . . . . . . . . . . . . . 3 Seeps. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Drilling, Oil Bay and Dry Bay . . . . . . . . . . . . . . . . . . . 5 Drilling, Fitz Creek . . . . . . . . . . . . . . . . . . . . . . . 11 Vu 1 can i sm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Exploitation possibilities . . . . . . . . . . . . . . . . . . . . 17 Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 ILLUSTRATIONS Fi Index map of Alaska . . . . . . . . . . . . . . . . . . . . . 4 2. Iniskin Peninsula, Alaska . . . . . . . . . . . . . . . . . . 10 TABLES 1. Wells drilled on the Iniskin Peninsula. . . . . . . . . . . . 7 2. Analysis of gas from Bowser Creek well. . . . . . . . . . . . 12 Juneau Mineral Information Ctr. Bureau of Land Management 100 Savikko Road, Mayflower Is Douglas, AK 99824 i OIL AND GAS EXPLORATION ON THE INISKIN PENINSULA, ALASKA by Donald P. Blaskol/ ABSTRACT Oil and gas exploratory drilling was initiated in the Iniskin Penin- sula area in 1900 on the basis of oil and gas seeps which had been found there. Between 1900 and 1906, six holes were drilled in the Oil Bay -Dry Bay drainage area, the deepest going to 1,905 feet. All holes encountered oil and/or gas but commercial production was never attained. Between 1936 and 1939, a well was drilled on the Fitz Creek anticline to a total depth of 8,775 feet. That well produced enough qas to run the camp power plant and had good shows of oil. However, it was plugged and abandoned after strongly flowing salt water shut-off the potentially productive formations. Another well was drilled and tested at various times between 1954 and 1959. The Beal well was drilled to a total depth of 9,745 feet and again oil and gas shows were encountered throughout the hole. It was suspected that a heavy mud column adversely affected the potential reservoir sands by effectively plugging them and destroying permeability. The hole was plugged and abandoned. 1/ Petroleum engineer, Alaska Field Operation Center, Anchorage, Alaska. A well drilled in 1958-59, the Zappa No. 1, also encountered encourag- ing oil and gas shows but never attained commercial production. Flowing hot salt water and steam were encountered in the drilling of this well, and this may well have been the first well encounter with geothermal poten- tial in the State of Alaska. The Iniskin Peninsula remains an interesting area for possible hydro- carbon production as well as a promising geothermal resource area. INTRODUCTION Natural oil and gas seeps on the Alaska Peninsula led to "early -day" oil drilling in several areas of the Peninsula. One such area was the Iniskin Peninsula, located on lower Cook Inlet near the northern portion of the Alaska Peninsula. By 1975, nine wells had been drilled on the Iniskin Peninsula; all encountered encouraging oil and gas shows but none attained commercial production. Logs and drilling records were studied and it appears that all wells experienced common problems, including trouble with hole caving. All wells encountered encouraging gas formations at shallow depths, and the deeper wells encountered strong flows of salt water at depth. The last well drilled on the Iniskin Peninsula encountered hot salt water and steam. ACKNOWLEDGMENTS The author wishes to express thanks to Robert G. Bottge, mining engineer and minerals economist, Bureau of "dines Alaska Field Operation Center (Juneau), for his candid suggestions regarding the preparation of this report and his contribution concerning mineral processing by exploit- ing geothermal and natural gas resources. LOCATION The Iniskin Peninsula lies on the west side of lower Cook Inlet V approximately 30 miles west of Homer on the Kenai Peninsula. It is located on the Iliamna quadrangle in the U.S. Geological Survey topographic map series (fig. 1). The Iniskin Peninsula is within a geologic province known as the Cook Inlet Mesozoic Province./ LAND STATUS Under the Alaska Native Claims Settlement Act (Public Law 92-203, Section ll.(a)(3)), the Iniskin Peninsula was withdrawn for Native selec- tion under the definition of "Village Deficiency" lands. According to terms of the Act, villages were to make their selections by December 18, 1974. Most of the land on the Iniskin Peninsula has been selected by villages in the Cook Inlet region, although title to the land has not vet been conveyed (December, 1975). GEOLOGIC POTENTIAL The earliest accounts of petroleum activity in the Iniskin area are to be found in U.S. Geological Survey reports.!/ In addition, geologic investigations which resulted in a detailed stratigraphic section description of the area concluded that the Fitz Creek anticline was a structure favorable 2/ Miller, D., T. Payne, and G. Gryc. Geology of Possible Petroleum Provinces in Alaska. U.S. Geol. Survey Bull. 1094, 1959, 132 pp. 3/ Martin, G. C. The Petroleum Fields of the Pacific Coast of Alaska, With an account of the Berino River coal deposits. U.S. Geol. Survey Bull. 250, 1905, 64 pp. ,k3 4 l L� for the accumulation of oil.4/ In 1966, Detterman reviewed the work of previous geologic investigations and reported on the results of more recer field work on the Alaska Peninsula, as well as interpreting the geologic data obtained from wells drilled in the Iniskin Peninsula -5/ Although the Jurassic rocks could be considered good source rocks, and do contain oil and gas in the wells drilled, commercial production has not been attained. SEEPS Oil seeps were first noted on the Iniskin Peninsula during 1882.x/ Claims were staked near the headwaters of Bowser Creek and Brown Creek in 1892, but drilling never took place and claims were abandoned. During 1896, more claims were staked in the Oil Bay area and work was reportedly begun in 1898 by the Alaska Petroleum Company.7/ DRILLING, OIL BAY AND DRY BAY The earliest drilling on the Iniskin Peninsula began around the turn of the century near the seep areas. The first well was drilled to about 4/ Kirschner, C. E. and D. L. "linard. Geology of the Iniskin Peninsula, Alaska. U.S. Geol. Survey Oil and Gas Investigations Preliminary Map 95, 1949, 1 p. 5/ Detterman, R. L. and J. K. Hartsock. Geology of the Iniskin-Tuxedni Region, Alaska. U.S. Geol. Survey Professional Paper 512, 1966, 78 pp., 5 plates. 6/ Work cited in footnote 5. 7/ Work cited in footnote 5. C 1,000 feet and encountered natural gas in several zones all the way to total depth (table 1). Oil was encountered at around 700 feet, but a water zone below the oil-bearing strata had enough pressure to cut-off the oil flow. The well was subsequently plugged and abandoned. Three additional wells were drilled by the Alaska Petroleum Company between 1904 and 1906. One of the wells was drilled to only 450 feet and then abandoned. The other two wells had oil and gas shows, but were never completed as producers because of hole caving above the potentially productive zone. The Alaska Oil Company was formed in 1901, and began drilling on Brown Creek near some gas seeps in 1902. Two wells were drilled to shallow depths without success. It is assumed mechanical difficulties played a Dart in these drilline operations.$/ All of these "early -day" wells were drilled to the south and east of the Fitz Creek anticline about 5 miles south of Chinitna Bay (fig. 2). During 1973 and 1974, U.S. Bureau of "lines personnel located and observed remnants of oil wells drilled in the early 1900's. Seeps and seep areas were also investigated near what is now known as Well Creek (Iliamna C-1 quadrangle). A definite determination could not be made as to the activeness of the oil seeps. However, oil was seen rising to the surface of ponds and streams, and the waters draining the seep areas continually carried a rainbow sheen indicative of bitumen. Also, free oil was found floating on still ponds 8/ Work cited in footnote 5. r The greenish -colored oil varied TABLE 1. Wells drilled on the Iniskin Peninsula DRILLED BY --------- WELL NAME---------- LOCATION----------- SPUD --------------- COMPLETED---------- TOTAL DEPTH-------- STATUS------------- ALASKA PETROLEUM COMPANY NO. 1 NE 1/4, SW T. 6 S. , R. 1900 1903 1,000' Plugged and 1/4, Sec. 11 24 W., (SM) Abandoned DRILLED BY --------- ALASKA PETROLEUM COMPANY WELL NAME ---------- NO. 2 LOCATION ----------- SW 1/4, NW 1/4, Sec. 11 T. 6 S., R. 24 W., (SM) SPUD --------------- 1904 COMPLETED ---------- 1904 TOTAL DEPTH -------- 450► STATUS ------------- Plugged and Abandoned DRILLED BY --------- ALASKA PETROLEUM COMPANY WELL NAME ---------- NO. 3 LOCATION ----------- SW 1/4, NW 1/4, NW 1/4, Sec. 11 T. 6 S., R. 24 W., (SM) SPUD ---------------1904 COMPLETED ----------1904 TOTAL DEPTH --------9301 STATUS ------------- Plugged and Abandoned DRILLED BY --------- ALASKA PETROLEUM COMPANY WELL NAME ---------- NO. 4 LOCATION ----------- NW 1/4, SW 1/4, NW 1/4, Sec. 11 T. 6 S., R. 24 W.I. (SM) SPUD ---------------1906 COMPLETED ----------1906 TOTAL DEPTH --------1,905v STATUS ------------- Plugged and Abandoned TABLE l.- Wells drilled on the Iniskin Peninsula- Continued DRILLED BY --------- ALASKA OIL COMPANY WELL NAME ---------- NO. 1 LOCATION ----------- SE 1/43 T. 5 S. SPUD ---------------1902 COMPLETED ---------- 1902 TOTAL DEPTH -------- 320' STATUS ------------- Plugged DRILLED BY --------- WELL NAME---------- LOCATION----------- SPUD --------------- COMPLETED---------- TOTAL DEPTH-------- STATUS------------- DRILLED BY --------- WELL NAME---------- LOCATION----------- SPUD --------------- COMPLETED---------- TOTAL DEPTH-------- STATUS------------- DRILLED BY --------- WELL NAME---------- LOCATION----------- SPUD --------------- COMPLETED---------- TOTAL DEPTH-------- STATUS------------- NW 1/4, Sec. 35 R. 23 W., (SM) and Abandoned ALASKA OIL COMPANY NO. 2 NE 1/4, SW 1/4, Sec. 35 T. 5 S., R. 23 W., (SM) August, 1903 1903 Abandoned shallow depth Plugged and Abandoned INISKIN DRILLING COMPANY IBA NO. 1 1,500' W., 1125' N. of SW Corner Sec. 8, T. 5 S., R.23 W., (SM) 9/7/36 1939 8,775' Plugged and Abandoned ALASKA CONSOLIDATED OIL COMPANY, INC. INISKIN UNIT BEAL NO. 1 2,000' W., 1,700' N. of SE Corner Sec. 17, T. 5 S., R. 23 W., (SM) 8/4/54 1959 9,746' Plugged and Abandoned a TABLE 1.- Wells drilled on the Iniskin Peninsula - Continued DRILLED BY --------- ALASKA CONSOLIDATED OIL COMPANY WELL NAME ---------- INISKIN UNIT - ZAPPA NO. 1 LOCATION ----------- 2,370' S., 290' W. of NE Corner Sec. 18, T. 5 S., R. 23 W., (SM) SPUD --------------- 12/25/58 COMPLETED ---------- 11/7/61 TOTAL DEPTH -------- 11,231' STATUS ------------- Plugged and Abandoned 2 R. 2s W. A R. 23 W. R. 22 W. .k 1� T 5S. WSW* ftNI Peery A sit Reck Adapted from U. S.G.S. Iliamna quadrangle Figure 2.— Iniskin Peninsula, Alaska 10 in weathering characteristics, but some of the oil definitely looked "fresh." Active gas seeps were also found near the wells drilled on Bowser Creek and Brown Creek. Gas was observed bubbling up through the water inside the surface casing of an abandoned well on Bowser Creek and a sample was obtained. The analysis of this gas appears in table 2.9/ DRILLING, FITZ CREEK During 1936, a well was spud along Fitz Creek. The location of this well presumably was picked on the basis of the identification of a geologic anticline (Fitz Creek anticline). The well, called the Iniskin Bay Association No. 1 (IBA No. 1), was drilled by the Iniskin Drilling Company (sometimes referred to as the Havenstrite Oil Company). Drilling was done only during the summer and fall months, and it took three years to complete the well as a dry hole. However, oil and qas shows were encountered at intervals below a depth of ahout 4,700 feet to total depth of 8,775 feet. Near the end of the drilling year of 1938, several zones were tested in the interval between 5,604 feet and 7,156 feet. According to the log, the well "produced enough gas (10 p.s.i. per day) each day to run electric power plant." In successive shut-in and bleed -off periods, the well produced 15 barrels of light -green oil in one hour. An analysis of that oil was accompanied by the following comment on the analysis sheet: "This is a very high gravity (46.80 API) paraffin base crude, very rich in gasoline 9/ Blasko, D. P. Oil and Gas Seeps in Alaska. Alaska Peninsula, Western Gulf of Alaska. Bum-ines RI 8122 1975 (in press). 11 TABLE 2.- Gas analysis from Bowser Creek well Sample From: Well X Stream Area Iniskin Peninsula Location NW 1/4, sec. 11 T 6 S, R 24 W. (SM) Seep Other Sampled By US Bureau of Mines Date Sampled 6/7-� Quadrangle Iliamna Pertinent Data Regarding Sample: Dry hole well. Gas bubbling up through water in surface casing. Analysis: Performed by U.S. Bureau of Mines Helium Operations, Provided by Amarillo, Texas Special Results: Analysis: Methane 79.2 % % Ethane 0.0 % Hexanes Plus Propane Trace % 20.4 % Normal Butane 0.0 % Isobutane 0.0 % Normal Pentane 0.0 % Isopentane 0.0 % % Cyclopentane 0.0 % Hexanes Plus 0,0 % Nitrogen 20.4 % Oxygen 0.0 % Argon 0.2 % Hydrogen 0.0 % H2S 0.0 % CO2 0.1 % Helium 0.01 % Total 99.9 % Calculated gross BTU/cu.ft., dry at 60°F. and 30" mercury 802 Specific Gravity 0.641 12 with exceptionally low sulfur content." At the conclusion of this test, the well was shut-in for the year and bled once a month from December, 1938 to May, 1939. During these bleed -off periods, the well usually flowed salt water with some gas. Upon re-entering the well in May, 1939 and cleaning it out, the well flowed some qas and a little oil. Before drilling commenced, however, the oil and qas production ceased and the well flowed salt water at a rate of about three barrels per day. Additional drilling from 7,156 feet to a total depth of 8,775 feet encountered more oil and gas shows. Final testing of the well resulted in the well flowing only salt water. The well was plugged and abandoned. The log of the IBA No. 1 well also reveals that coal was encountered in thin veins. First encounter of coal veinlets occurred while drilling the interval between 1,519 feet to 2,501 feet. In one 3 -foot section of a core taken between 5,078 feet to 5,094 feet, the loq reported "much coal, gas and small qlohules of black oil." That depth was the last mention of coal in the log. Another well on upper Fitz Creek was started during 1954 by a group called the Iniskin Unit Operators. This well, called the Beal No. 1, was located to the southwest of the IBA No. 1 well. The well was drilled and tested during various periods between 1954 and 1959. Gas and oil shows began below 2,450 feet, and an operations report states that the interval from 2,454 feet to 2,585 feet was tested for gas production but was eventually cemented off in favor of attempting to establish oil production from lower depths. By the end of 1955, the well had been drilled to a total depth of 9,746 feet, with encouraging oil shows below 6,000 feet. 13 Testing took place during 1956 and 1957. Operations during 1957 consisted of cleaning out, perforating and testing selected intervals in the oil - saturated sediments between 6,300 and 9,600 feet, although the saturated interval extended to a total depth of 9,746 feet. A lack of permeability was thought to be the reason for not attaining commercial production. The operation report concluded that the lack of permeability could have been caused by adverse drilling methods. The report states that of the damaging factors, one was "....the high mud weight used in drilling the well and the excessive time during which this mud stood on the formations. Because of the caving shale condition, it was necessary to drill the hole with 105 -pound mud and the weight material used was Baroid. Baroid is a completely inert and insoluble substance with a high specific gravity (Ba SO4). It settles out of any fluid if given sufficient time and it is extremely difficult to remove it from the face of the formation or from any porous beds into which it has penetrated. The zones in Beal No. 1 were subjected to this action for two years prior to the current test. The second factor is the apparent high clay content in the sandstones in this area. Certain types of clay swell on contact with fresh water and seal any porosity that may be present. This is particularly true of clays associated with or derived from volcanic rocks. Sediments containing such clays have a tendency to slack and cave, and this was found to be true of the shales in the Beal well. The 9,100 foot zone contains volcanic tuff. For those reasons it may be that any potentially productive sands may have been sealed off by the water -base drilling fluid before the tests were made." On the basis of that possibility it was felt that production may have been attained if an oil base mud had been used. Recommendations were made to either hydra -frac the promising formations in the well or to deepen the 1n well using a different circulating medium such as an oil base mud or air. On the basis of the recommendations, a hydraulic fracture job was under- taken in 1959 by Alaska Consolidated Oil Company, Inc., who had taken over the operation from the original company. The fracturing job was confined to three zones: 9,131 feet to 9,442 feet, 6,871 feet to 7,350 feet, and 6,270 feet to 6,500 feet. No commercial production was attained, although the middle zone showed a small increase in high gravity black oil. The well was finally plugqed and abandoned in 1963. On Christmas Day, 1958, the Antonio Zappa No. 1 well was spud at a location approximately one-half mile south and east of the Beal well. Tie well was being drilled for the Iniskin Unit Operators by Alaska Consolidated Oil Company, Inc. Taking advantaqe of knowledge qained when drilling the Beal well, several drilling procedures were utilized to maximize the possibility of attaining production. Foremost of these was continuous drilling during winter as well as summer months so as not to leave mud in the hole which could possibly damage the potential oil- bearing formations such as was suspected in the Beal well. Shows of oil and gas were prevalent from 1,600 feet down to total depth of 11,231 feet, but commercial production was not attained. The well encountered stronqly flowing salt water at 9,740 feet. A situation which at the time of drillinq was nothina more than "hole trouble" can be looked at today with more than passing interest. The log of the Zappa well notes that on a drill stem test at 8,499 feet "....reopened and well flowed mud for 4-1/2 hours at 400 pounds. At end of 4-1/2 hours started 1C flowing hot salt water and steam at 375 pounds. Flowed steadily for 2 hours ate -shut-in. Killed well with 115 pounds mud ..." The Zappa No. 1 could be the first well drilled in Alaska to encounter geothermal potential, although this was thought to be of little significance at the time. The well was plugged and abandoned by Belco Petroleum Corporation who had taken over operations from .Alaska Consolidated Oil Company, Inc. VULCANISM Iliamna volcano is located approximately 20 miles north of the Iniskin Peninsula and has itself contributed to the geology and stratigraphy of the Iniskin Peninsula.10/ Augustine Island, also a volcano, is located about 20 miles to the south and a little west of the Iniskin Peninsula. The effect of the actions of this volcano on the Iniskin Peninsula is relatively unknown. Mention is made of these volcanoes only because of the unusual encounter of hot water and steam in the Zappa well. The proximity of these volcanoes and their potential influence on the surrounding area might enhance the geothermal resources of the area. A similar situation occurs in Northern Mexico at Cerro Prieto, about 14 miles south of Mexicali, Baja California, where a geothermal power plant is in operation. l/ This plant flashes hot water to steam and, in 1975, had a rated capacity of 75 MW. The wells supplying the power plant are located to the northeast of 10/ Work cited in footnote 5. 11/ Comision Federal de Electricidad. Cerro Prieto Underground Power. A CFE Editorial Booklet. 1974, 25 pn. 1A Laguna Volcano and to the southeast of Cerro Prieto Volcano. There is no doubt that these two manifestations cause and influence the underground geothermal resource. EXPLOITATION POSSIBILITIES The utilization of resources found on the Iniskin Peninsula, specifi- cally oil, gas or geothermal, should pose no great difficultues. Should oil be encountered in commercial quantities, several alterna- tives are available. A loading dock could conceivably be constructed from shore into Chinitna Bay where tankers could pick up the oil. Also, the oil could easily be barged from Chinitna Bay to several places such as the Drift River oil loading terminal, the Standard Oil Company of California oil loading terminal at North Kenai, or even to the refineries located at that point. Another possibility is barging from Chinitna Bay to Homer. A pipeline from the Iniskin Peninsula to any of the above mentioned areas is also feasible. If natural gas were to be found, again several possibilities exist for transmission and disposition. Depending, of course, on the reserves, a liquefaction plant could be built on the Iniskin Peninsula for shipping the liquefied gas elsewhere. A mine -mouth power generation plant is an alterna- tive. Another alternative is pipeline transmission to the Kenai Peninsula where the gas could be liquefied at existing facilities or used to augment feedstock supply to the petrochemical plant and/or commercial distribution system. 17 If geothermal potential is realized, several interesting possibilities exist for its development. Should the temperature be appropriate, power generation either by steam, fluid flashing to steam or binary system would be possible. Markets for electricity might be strictly local, such as a mineral processing plant built on the Iniskin Peninsula. The development of iron and copper deposits within forty miles of the Iniskin Peninsula may be enhanced by the existence of qeothermal resources on the Iniskin Peninsula. Iron ore claims exist on both sides of Iliamna Bay, near old Iliamna at the head of Iliamna Lake, and on the northeast and west sides of Meadow Lake which is just east of Iliamna Lake. Copper ore claims exist at Kasna Creek on the south side of Kontrashibuna Lake. An iron ore complex producing 2 million tons of pellets each year would require about 27,500 kW -hr per hour plus 150 Mcf of natural gas per hour.12/ A copper ore complex processing 40,000 tpd would require about 38,600 kW -hr per hour plus 684.6 Mcf per hour of natural gas.13/ The power requirements would require 10 and 12 wells for the iron and copper complexes, respectively, based upon 5,000 kW per well plus one disposal well for every two wells used for power.14 12/ U.S. BuMines. An Economic Evaluation of the Production of Iron Oxide Pellets from Magnetic Taconite Ore, Two -Million -Ton per year Plant. Process Evaluation Group Report No. 70-9-A, 1970, 33 pp. 13/ Bottqe, R. G. Comparative Porphyry Copper Mining and Processing Costs - Alaska Versus Arizona. BuMines IC 8656, 1974, 83 pp. 14/ Rosenbruch, J. C. and R. G. Bottge. Geothermal Energy: Economic Potential of Three Sites in Alaska. B04ines IC 8692, 1975, 40 pp. HE Electricity could also be transmitted to tie-in with existing facilities either by laying cable from the Iniskin Peninsula across Cook Inlet to Homer, or by tying -in at the Beluga Power Plant on the west side of the Inlet. Another possibility of geothermal utilization is for agricultural greenhouses built and operated on the Iniskin Peninsula. A combination of power generated from local natural pas and geothermal hot water for greenhouses would be an ideal situation for a viable industry. Such a possibility was determined feasible in a hypothetical case in other areas of Alaska.l5/ CONCLUSION On the basis of available geologic literature, logs and well drilling histories, the Iniskin Peninsula appears to be a unique area to explore for oil, gas, geothermal resources and, to a lesser degree, even coal. Should any one of these resources be found in commercial quantities, transmission in kind or in the form of energy poses less difficulty than in most other areas of the State. This is true because the Iniskin Penin- sula is near populated and industrial areas already containing facilities for resource utilization. The region's vulcanism and its effects, although basically unknown, have nonetheless already demonstrated a potential for geothermal potential. In particular, this area provides an opportunity to determine whether geothermal resources can be developed in Alaska. 15/ Work cited in footnote 14. 19 lc-apfm lOjan95 LOCATION CLEARANCE REPORT State of Alaska OIL AND GAS CONSERVATION COMMISSION PTD No. _~-O [E Me~norandum To File:.API No. . Well Name Operator Location spud: /Z/z~ ~0: ~:~ Note casing size, wt, depth,. ~t vol, & procedure. Long Csg: ' ;;: Z~ % ~ ~ ' Pezf inte~als - tops: ~ ~ Review the well file, and comment on plugging, well head status,, and location clearance - provide loc. clear, code. Well head ~t off: ~ Marker post or plate: ~ / · Location Clearance: ~ Code Signed Date Pra~iou~ Sttt~: d M~7 9th, !96% Termh'~atJon of I~iskLn Peninsula Unit At a.s k a ---~-' ' ~entl~men ' Flease be advised that on May 3rd, 1962, effective as of Ma,/ Ist, 1962, Arthur ~ B~er, Act~g Director of the Geologic~ Su~,ey approved ~e Ter~n~ation of the Lniq)~in Pe,':~ns~a Unit Agreemen~ pursua.n~ to Sec..on i0 ~ercvf ,vith request for prc>~':-~pt completion of proper abm~donr~er~t and cleam.-.up work durfi~g fav(,rable wea~er, Please ad.rise D~,e undersigned if you have any ¢iucstions with regard to this matter. Yours very tr,~y, . .vt/kB: H'V~ I~ELCO DE TROLEUM CORPOR~'IION .,0 / ..~.'""._ /: . (../~,f., >~' ./" ./~ .... ,~..~... Robert A. Belfer Vice President / / F:LEO Pt Tf:t! Li LI ITl CORPORATION 6so THIRD AVENUE NEW YORk 17, N. Y. TI~LIEPHONE~ YUKON 6-81~11 Mr. Donald D. Bruce Chief, Petroleum Branch Division of Mines and Minerals P. O. Box lb8 Anchorage, Alaska De~r Don: December 21, 1961 26 1961 Petroleum Br°nC'h,,-~-,~rols Division of Mines an AtoskG Dept. o~ lqa~ura, ~"::' ":es Your request to John Zappa for logs of the well Antonio Zappa No. 1 was,forwarded to me for handling. Enclosed are the following logs: Electric Log Caliper Log Contract Caliper Log Radio activity Log 2" Radio activity Log 5" In additions you requested a copy of the mud log. We have only one prLut of this log and it is not suitable for copies to be made. I doubt if the mud log would be of much value, as evidenced by the caliper The personnel that were drilling the well advised me that they experienced a lot of caving and bridging trouble due to the high water loss mud used. If needed you can no doubt obtain a copy from Dr. Willis~'in California. Jack Wroble and I wish to extend our wishes to you and Dick for a Merry Xmas and a Prosperous New Year. Very truly yourss BELCO PETROLEUM CORPOEATION ~G/sw cc: Mr. John Zappa · L. R. Oramess Jr. Chief Engineer Fornm 9-881 a (Feb. 1951) ! i ! ' ! t i.i I I I i i i i (SUBMIT IN TRIPLICATE) UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOG i(:;AL SURVEY Budg~ Bureau No. 42-R358.4. Approval expires 12-31-40. Land Ofl~ce _. __~ ...... Otlt Lease No ............................. Unit ..... ~ ................ SUNDRY NOTICES' AND REPORTS ON WELLS NOTICE OF INTENTION TO cHANGE PLANS .......... ' ............. I...... SUBSEQUENT REPORT OF SHOOTING OR ACIDIZING ................ { ..... NOTICE OF INTENTION TO TEST WATER SHUT-OFF ........... :__{ ...... suBSEQUENT REPORT OF ALTERING CASING ....................... I ..... NOTICE OF INTENTION TO RE-DRILL OR REPAIR WELL ......... I ...... SUBSEQUENT REPORT OF RE-DRILLING OR REPAIR ................ { ..... NOTICE OF INTENTION TO SHOOT OR AcIDIZE .................. I...... SUBSEQUENT,..'. REPORT OF ABANDONMENT .......................... I..... NOTICE OF INTENTION TO PULL OR ALTER CASING .............. / ...... SUI 'PLEMEN/ARY WELL HISTORY .......................................... .... ...... :: ........ :___/__,__ :::: :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: (INDICATE ABOVE BY CHECK MARK NATURE OF' REPORT, NOTICE,' OI~'~TH~ I:)A~i0 ': j ~" 19__?~ .................................................................................................................... _ ~ Seq. ~~o.)(Twp.) : (R~ge) (Meridi~) ................................................................................................................................................ (Field) (County or Subdivision) (Sta~ or Terri~ry) The elevation of the derrick flOOr above sea level is ............ft. DETAILS OF WORK (State names of and expected depths to objeCtive sands; show sizes, weights,;and lengths of proposed casingst Indicate mudding jobs, cement- ing points, and all other important proposed work) I iIliiiiIi Conserva60n Divt~ton U.S. GEOLOGI(3AL Regional Oil & Gas Supervisor I understand that this plan of work must receive approval in writlr~ by the Geological Survey before operations may be commencod. Address' ~___~__~~~ Z~_~_: ........... ................................ · ._ / GPO 862040 UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY Form approved. Budget Bureau No. 42-R356.5. Anehorase .... 010531 .................. .u,,~htii~iii_ ..................... LESSEE'S MONTHLY REPORT OF OPERATIONS Tl~e followin~ is a correct repor~ of operatior~s and prod~c~ior~ (inclu~din~ drilli~ and prod~ci~ w~) fo~ ~ ,,~o,~ of ............ ~_~~ ............ , ~9_~_, ............................................................................ address ............ ~_~__~.~__~.~.$_ ...................... Co,~pa~y_~__~~-~.-~~-~.~-~ .... SEC. AND [ m ~ OF ~ ] Twr. lr~ S. of 18 , ! Se~t. 25 io 2' Sept~ 29 ~o ~ RANGE WELL [ DA~s iBARRELSOU. FT. OF GAS NO. LPao~)vc~n or OIL GRAVITY (In thousands) requested ~r~ tniskin Uni ,~r~ra~to~. ~evio~ o~ 1959. / ratio~ r~~d Repairins hole. ~eut in ho .~ixed mud I.e ~0 Col zd associaC GALLONS or BAaaE~.S or RES~IARKS (]ASOLINE '~ATER (If (If drilling, d~th; ff shut down, oa~e; ~ECOVERED none, 8o s~ate)date ~d result of t~t for g~oline content of g~) o~ratot ot thi~ ~i~ has C O~rat~rs, l~.[ to Belts Petrole~ rations ~re sus~ed in ~c~ber mr 2&, 1!)61 md equilamnt prio )~ Co 6355,1. Testm ~ditionho? tm Status Hydri! tins ope / round shoe & 100 5982.c~ v/690 t RECE NOV E Oil & Ga s~on of Min, Dept. of 260 w/S46 ox a & huns @ 23], r to re-enterin$ and Sha££er BOP rat ions mx thru IiV Collar @166~ VED 196l [aru. rid ]l~t~ ut~,:" NoT~..--There were ...................................... runs or sales of oil; .............................................. M cu. ft. of gas sold; ............................................. runs or sales of gasoline during the month. (Write "no" where applicable.) No~r.--Report on this form is required for each calendar month, regardless of the status of operations, and must be filed in duplicate with the supervisor by the 6th of the succeeding month, unless otherwise directed by the supervisor.~' Form 9-~29 16--25766-9 U, S. GOVER,IMEgT PEIWrlHO OFFICE ($anuary 1950) UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY Form approved. Budget Bureau No. 42-R356.5. omc' Anchorage ........ _;__~._t~.~_;~_ ................... LESSEE'S MONTHLY REPORT OF OPERATIONS Tl~e followi~ is a correct report of operations a~d prod~otio~ (incl~di~ drilli~ and prod~ei~ we~zs) for t~e mo,~t;~ of ......... .~o__~ .................. , ~9.~I___, ............................................................................ .4 ~ e r~ c' s address ........ _6__3__o_._~_r._d__by_eg_v9 ........................... oo ,, pan y _____~._.l_~_o__._P_~_~$.o..l..9_u~._._.o~._r_~9.~..~.t.~.ko..n.. . i~ York l Ts Ney Yi~rk ,~iOn, ed~~__~:,_P.,,, ........................................ ............ .... _ri ..................... ,,: .... ,- ' ....... " .... ::::::::::::::::::::: ..................... ======================= ....................................... .~ANGE M. (~ ALL@NS 09 (~ASOLINE I~ECOVERED BARRELS OF W~E~ (If none, so state) Cu. FT. OF OAS WELL Dire ]~AERELS OF OIL (~RAVITY (Ill thousands) NO. Pao~oc~ [ / ~uC job ~ ~87 · ,ppiS. I~~ a~e li~er t~oe, Se~ ~K~r ~ ~928 ~d ~eld/OK, ~ted 9-5~8', g~t failed. ~illed out ~ ~0 min. ~lu~ed after 20]minu~. :iat[~dr~6320, lSIJ6130~ :~levablb brtd~ p~us t~ 708~* and Jur~ce h~ser & e~ted[~ulus be ~e~ri~ed brtdse pin & r ;placed 9P ~99~ for bpeu hole~e ~. 1/i top ~ate~ c~~n. ~ate ~o ur~ace in ~o c~e ~op choke ~ o l/ ". ~essu ~te~& st~ ~ 375~ F1 ~d oteadi ~i~h[ll~ ~d. Set : etai er ~ 8512'. ~500.i ~T]~3 packer ~ 83 3. No Tee su~f~ce valve & Fac~ ored diesel ~p~~l~J c~ntc~ to~ bo~en te Drilled out to ~ested top of liner, I:. to 8622' and found mn 6g/M los to 9717'. sand) @ 0161. F~und top of plus @ to te~,r open bole. Tool open I hr. ~ecovere~l 1120' or 37.17 bbl ~d. ~ 2920, FSI ~8t, F-Hydro 6320. ~n re~tre, L hole tn 9-5/8" coS. Just bel~ ~u 9-~./8' & ~3-3/8" c88. w/75 Held, {[_~' min. f~llo~d bg nd w/sILshC sh~ jr 2 ~s~19 ulu, closed in for 5 mtn. ~e buil~ up ~o 21 $~. leered of ~ lxl. star,ed florins hot salt Ly tot 2 hfs & shit in. Killed veil & ~r~o~'arad ~/~ ~2~-0~0 & ~70- ~ve~ ~ ep~ port ton o~ rat hole mud. [~ed by ~d ~o11~d by hoc snlt No~E.--There were ...................................... runs or sales of oil; .............................................. M cu. ft. of gas sold; ............................................. runs or sales of gasoline during the month. (Write "no" where applicable.) No?E.--Report on this form is required for each calendar month, regardless of the s~atus of operations, and must be filed in duplicate with the supervisor by the 6th of the succeeding month, unless otherwise directed by the supervisor. Forxn 9-329 16--25766-9 u.s. GOVERNMENT PRISTINe OFFICE (January 1950) UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY Form approved. Budget Bureau No. 42-R356.5. ].AND OFFICE .................................. LEA$E NUMBER ................................ UNIT ........................................... LESSEE'S' MONTHLY REPORT OF OPERATIONS State .................................. ~oz~nty .................. ~ ................. Field .................................................................. T~e followir~ is a correct repor~ of operation, s and prod~ctio~ (ir~cl~dir~ drillin~ a~d prod~ci~ .October wells) for tAe mont]~ of 197..'1_._, J~e~t' s address ................................................................... Compa~y ............................................................ .............................................................................................. Si~r~ed ................................................................. PI~o~e ................................................................................... ~t~e~' s title ..... :: ................................................ I Cu. FT. OF (]AS ' GALLONS Or BARRELS Or ,'. : / ,~REMARKS, . DAYs [BARRELS OF OIL (]RAVITY (~ASOL1NE WATER (If ~I/d~rilllng~ d~pthi ff ehu~ down, eause; P~oooc~o (Iu thousands) RECOVERED none, so state) :' date and reault~of,test for gasoline .... '" ~butent ~f gas) ~ :~aS. 2 of 2 I d~ fo~tton, /d~e el o~1 0 5~' ~abbed & bbta~d ~race of 6915-~982. Wit~ pac~r ~ 6875'[ broke d~ fo~ion w/diesel and ~ab~d d~ ~aa~ t~ s~ll Co ~.ure. hrforatbd 6780-6820 v/i/it. j~th ~ackar 0 6~9' ~wab~d both NoT~..--There were ...................................... runs or sales of oil; .............................................. M cu. ft. of gas sold; ............................................. runs or sales of gasoline during the month. (Write "no" where applicable.) NoTE.--Report on this form is required for each calendar month, regardless of the s~atus of operations, and ~nust be filed in duplicate wi~h the supervisor by ~he 6th of the succeeding month, unless otherwise directed by the supervisor. Form 9-329 (January 1950) 16~2576§--9 ti. ii. 6OVERNMENT P/~INTIN60F~ICg l~tEslmT STATIJS: ................ Squeese eme0nCad boxer C.X. retainer @ 8367' v/75 ox co shuC off salt water encountered in open hole and perforations from 8500e-SZt25So Covered uss= produ~cive perforation 8005'-7855t v/Lld~P mud and sec D.C.X. plus @ 7050** Covered nonproductive (crate Sas) perforations 6083e-6780e v/It4# mud plu~ @ 6000°. Covered nonprodu~ci, ve (trace Sas) perforations 5960°-58&0 mud and sec D.C.X. plus @ 5800e~~ The par£oraced zones have a very smali amount of lev pressure Sas (3* flame chroush 2" pipe) without wac. er. In testins, pressures frmn &800-6000~ were needed for brukdov~, tudicaCtn$ seed cement behind casiuS and thus preventing misreCion or c~tea~ton tn chest lev pressure sones. propose Co fill hole rich heavy mud co surface, close BOP and suspend o~ermcions, Xf fusible, ac .e fuC~e ~ce and prior co reins the rte, top thru plu~ vail h drilled, ~lthud e~t~nC installed and acC~C mdt to uctXism ~ I~ vol~ l~ pr~suro S~ for fuel on the abando~nc MrkeC vttX h installed to c~ptmce P & A o~ this Appropriate notices will be outstayed to U.S, Geolosical Survw~ prior co additional york on thio veil, NOV 8- 1961 , ............ Regional Oil & Cas/Supervisor September 20, lg61 U Secretary, Belts Petroleum Corporation 630 Third Avenue Ney York 17, New York Dear Sir: I ~n in receipt of your application dated September 18, 1961 to enter and test lniskin Unit Operators well No. "Xnisktn UuitoAntonio Z~ppa" 1, Sec 18; T~S, R23~, Seward BSM. Please be advised that your application is approved subJecu to ~he rolls, in§ conditions: 1. 9houtd tho lap st the 9 5/8" and 7- casin$ test wet the 7" casiu$ shall be re-cemented ~hrouah perforations prior to cleaning out co 9070'° 2. Should the open hole cast below the shoe of the 7" liner prove non productive, a cement plug shall be placed ~rom 8576' to 8~76'. 3. AX! unsuccessful perforations shall be recemenCed prior to abandon- sent or completion o£ the hole. 4. A test of the 7" or 9 $/8" water shut o£f shall be made throush gun perforations above the highest sand that is to be opened to production. Will you please forward this Division a copy of your $100,000 Nationwide Bond? Xf you should have any further questions please do not hesitate to advise. Vet*,/ truly yours, DDB:bb cc: Ptr. Lee Hayes Hr. Robert McDonald Donald D. B~'uce Chief, Petroleum Branch APPLICATION !~O~ PERMIT TO DRILL, DEEPEN OR PLUG BACK - . .. NAME OF COMPANY OR OPERATOR _- ~ , Address - .... '~'-:': :DI~CRIPTION OF WI~LL AND LEASE Name of lease .,_~~ii:"~ .' _' 'i "_i~:"'. - I~Vell number A~ti~t~O I Elevation (ground) ~rell location (gi~e footage from section lines~ or block & ~urvey Section~township--range Field & reservoir. ([f_~:~dcat, so~st-ate):c : ~ -J ;C. oun£,Y .~.- .... Distance, in miles, and direction from nearest town or post office Nearest distance from proposed location Distance from proposed location to nearest drilling, to property or lease line: completed or applied--for well on the same lease: ~, 3/~ ~ ~ ~J~,t* ~1~. feet ~ feet Proposed depth: Rotary or cable tools J Approx. date work will start ~ ~ ~ ~ ~ Number of wells on lease, including this well, ~~--~--~omple~ed in or drilling ~o this r~ervoir: If lease, purchased with one or more Name . Address wells drilled, from whom purchased: Status of bond ]~1~-~0 e~er~ the Remarks: (If this is an application to deepen or plug:back, briefly describe work to be done, giving present ~~~'~~ producing zone and expected new producing zone) CERTIFICATE: I, the undersigned, state that I am the ~!~~ of the (company), and that I am authorized by said company to make this report; and that this report was pre- pared under my supervision and direction and that the facts stated therein are true, correct and~complete to the best of my knowledge. Permit Number: " Approval Date: 0 h~~'t~ ~ :S~tember 20. ~~,, _-:,~-- Approved By: ra'~ Notice: Before sending in this form be sure that you have given · all information requested. Much unnecessary correspond- ence will thus be avoided. See Instruction on Reverse Side of Form Alaska Oil and Gas Conservation Commission Application to Dr/Il, Deepen or Plug Back Form No. P-1 Authorized by Order No. 1 Effective October 1, 1958 X~orx~ 9-881 a (Feb. 1951) (SUBMIT IN TRIPLICATE) UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY Budget Bureau No. 42-R358.4. Approval expires 12-31-60. '--nd Oa~ ..... ~___l~.__r.__a_li~ ..... L®asa No. ............................. u~t ___3~rLm~_~~l~a~ SUNDRY NOTICES AND REPORTS ON WELLS NOTICE OF INTENTION TO RE-DRILL OR REPAIR WELL ......... I ....... I SUBSEQUENT REPORT OF RE-DRILLING OR REPAIR ................ I ..... NOTICE OF INTENTION TO 'SHOOT OR AC IDIZE .................. I ...... I SUBSEQUENT REPORT OF ABANDONMENT .......................... I ..... ~O, CE O~,N~ENT,ON ~0 ~U~ O~ ~ C~,N~ .............. I ...... II ~UP~..,EN,~ W=~.,~O~ ................................... I ..... '~OTIcE OF INTENTION TO ABANDON wELL ......................I ...... II ........................................................................ I ..... mm_ x_tat _x*~_auta~__& ~Im~__~mll ........ I_X__ll ............................................................................. (INDICATE ABOVE BY CHECK MARK NATURE OF REPORT, NOTICE, OR OTHER DATA) WellNo .... I_ ............ islocatedl,~_ .... ft. fsmm__~/lineand[" ...... 'ft~~] lineal sec. 11 ....... S~__~_h~~_~ .............. ~__5& ............. ~ ................ J~ ................... (~ ~e. ~5 ~e. No.) (Twp.) (R~ge) (~erldi~n) .................. ~a~ ................... (Oounty or Subdivision) (Sta~ or Te~l~ry) The elevation of the derrick floor above sea level is 33_0 ...... ft. Matural Sz'eund. DETAILS OF WORK (State names of and expected depths to objective sands; show sizes, weights,; and lengths of proposed casings; indicate mudding jobs, cement- lng points, and all other important proposed work) i~lan to re*muter h0~e vb~h to already eased m I understand that this plan of work must receive approval in writing by the Geological Survey before operations may be commenced. GPO 8 62040 OIL A~D GAS OPERATIONS~ The undersigned .is, on the recOrds, of ~e Geological Survey, unit operat- or under the IN,SKIN PEN~ unit. agreemen%~ Iniskin Peninsula, Alaska~ Uo S. Government No. .14-08'001-1158, ApProved NoVember~?th, 19%3, and hereby designates NAmEr BELCO ~ETROLEU~ O~O~TION Address~ 630 ~hird AVenue, New York, 17~ New York as its agent, with full authority to act in its behalf in complying with the terms of the unit agreement and regulations applicable thereto and on whom the supervisor or his representative may serve ~ritten or ~ral instructions in securing compliance with the ~ and Gas Operating Regulations with respect to.' (Anchorage 0~31) Township 5 SoUth,.R. 23 We~t, S.M., Alaska Section 18'~ Ail 19~ Ail 20~ Ail containing 1,848.88 acres, more or less DISTRICT LAND OFFICE~ ALASWA SERIAL NO.: ANCHORAGE 010%31 It is understood that this designation of agent does not .relieve the unit operator of responsibility for compliance with the terms of the unit agree- merit and the Oil and Gas Operating Regulations. It is also understood that this deSignation of agent does not constitute an assignment of any interest under the unit agreement or any lease committed thereto. In case of default on the part of the designated agen t~the unit oper- ator will make full and promDt compliance with all regulations, lease terms, or orders of the Secretary c~ the Interior or his representative. The unit operator agrees promptly to notify the oil and gas supervisor of any change in the designated agent. The designation of agent is deemed to. be temporary and in no manner a permanent arrangement. This designation of agent is limited to field operations and does not cover administrative action requiring unit operator's specific authorization, Date= September 7th, 1961. ~ V. Z~g, President // ANTONIO ZAPPA NCo ! WELL -ALASKA COMPLETION P~OGI~M , , ,J~ ,,,, : : , ,,, ~ ~ ~ , , ~ __ ~ , 1. Go in hole to condition mud and clean out to shoe at 8526 and pull out of hole. Ru~ in hole with 9 5/8" packer' and set ~vove top of 7" liner and sv~b to test cement seal of lt~er. (I~ring first moths shut iai watc~ reported pressure build up on casing). . Go in hole-with bit, drill out 7" shoe mad cement plug Lvom 8440 to 8620 a~d condition mud to top of cement plug at · Pull out of hole, run logs and go in with a 7" full bore packer With sufficient tall pipe to re,ch to 9070. Displace tubing and open hOle With diesel oil, se2 packer and swab test. If productive rrmke 4 hour stabilized tests on 1/2", 3/8", 5/16" and 1/4"chokes and shut in for stab~.ized B~[P. 4~ 5 . I.f step 3 is Productive set cement plug from bottom of ~" casing up to 8450~' If step 3 is act productive set a 7" plug with wireline and pla~e cement on plug with dump bailer. Perforate 8425-50 w/4 shots per foot. Itun packer with tailpipe and retreivabl¢ bridge plug, setting plug below interval to test, p~ up a few feet, displace v~.~th diesel or oil (if step 3 is pro- ductive) set packer, break dorm formation and swab test. If productive make product/on tests as in step 3. Perforate 7855-7928 and 7945-8005 w/4 shots per foot. Pull up retreivable bridge plug and set at 8020. Pull tubing a few feet and displace hole with diesel., set packer, breakdown formation and swab test. If productive make production tests as in step 3. . Set 7" cast iron bridge plug ~t 7050. If test of 7" and 9 5/8" lap in step 2 shows no Cement present, .cement squeeze the ],ap. After 12 hours,, w OC clean out to top of 7" liner. . 5 Perforate 6955-77 w/4 shots per foot, displace hole with diesel with tail pipe below 6977 and set packer at 6930. Breakdown With diesel and swab, If productive make production tests as in step 3, NOTE~,' B~ass this test if time. ie short_.____. Set drillable 9 5/8" bridge plug at 6850 and perforate 6780 - 6815 w/4 shots per foot. Displace hole with diesel with tail pipe below 6815, set packer at 6750, breakdown with diesel and swab. If productive make production tests as in step 3. 10. Set drillable 9 5/8" bridge plug ~t 5980. Perforate 5850-5960 5960, set l~acke~.~t: 5820, breakdown with diesel and swab. If productive make production tests as in step 3. NOTE: 1. If oil. is produced in sufficient quantities, future testing will use this oll instead of d/¢sel. The decision to acidize or frac each sand ~/11 be dependent on the initial swab tests a/ret breakdcrwn with diesel, JLWnmf September 11, 1961 ROBIN WILLIS GEOLOGIST - PETROLEUM ENGINEER 790 SUBWAY TERMINAL BUILDING LOS ANGELES 13, CALIFORNIA MUTUAL 21~S June 9, 1960 Mr. Donald D. Bruce, State Petroleum Geologist, State of Alaska, 329 Second Avenue, Anchorage, Alaska. Re: Iniskin Unit Operator Antonio Zappa No. i Well Section 18, T. ~S., R. 23W., Seward B&N. Dear Mr. Bruce: Replying at last to your letter of April 19th, I enclose the following material regarding the above mentioned well: Well history Description of ditch samples and cores Electric log ) Caliper log ) Under separate cover Contact caliper log ) Mud log ) I regret that this material could not be for- warded sooner. The sample description had never been fully copied from the original pencil notes, and in other States where I have worked these reports are not filed until completion or abandonment of the well. If there is any additional information you wish regarding this well, please advise me and I will be glad to submit it. Youfi~ very truly, / RW:w lniskin Unit Operator, "Antonio Zappa" No 1. ~ell Sec. 18, T.SS., R.23~., 2.B.&M., Alaska · .~' ' '~ ' ~ F,: ~,',vl ~'vii~:,c,'~l~ /25/S8. 12/25-30 Spudded in. Dri:lled 12¼" hole to 348', reamed to 17". Cemented off lost circulation in surface gravels three times between 0-90' · Ran 13-3/8" casing to 344', cemented with 260 sacks construction cement, with returns to surface. 1/17-5/14/59 Drilled 12¼" hole, 348' to 7015', 8-5/8''~ hole to 7051' coring selected intervals (see detailed log). S/ z/59 5/15-!6/59 Ran Welex electric log, and contact-caliper log, 340-7051' · Ran 9-5/8", 3_8¢, 435#, 47# and 53.5~, new seamless N-80 casing to 701~'; cemented with construction cement, 546 sacks around shoe, snd 100 sacks through Baker stage cementing collar @ 1663'. Drilled 8-5/8" hole, 7015.' to 11,231', coring selected intervals (see de tailed log). 6/25-26/59 Ran Welex electric log, contact-caliper log, and caliper log, 9174'-7010'. 7/19/59 Encountered flowing salt water @ 9740'. From mud weight and mud replacement data estimated hydrostatic pressure @ approximately 7000 psi; rate of flow .against b000 psi, 1600 barrels per day. The flow was controlled with a mud weight of 105 lb. per cu. ft. 7/29/ 9 Ran Welex electric log and contact caliper log, 9877'-9174' · Stuck core barrel ~ 11,217' depth 11,231 ') · , 14' off bottom (total 1a/6/59 Recovered drill pipe to 10,934', leaving nine drill collars and bit in hole. 12/13-14/59 Ran Welex electric log, 10,90(~9877t, and caliper log, 10,520'-7010'. Set cement plug, 60 sacks construction cement, through open-end 4~" drill pipe hung @ 9720'. No record of top of plug. Set cement plug, 100 sacks construction cement, through open-end drill pipe hung @ 8620'. Pulled up to 8~0', circulated excess cement from hole. Iniskin Unit Operator, "Antonio Zappa" No. 1 Well Page 2 Found top of cement @ 8430'. Cleaned out to 8528'. Made up liner as follows: Halliburton combination guide & float shoe 1 joint 7" 32# N-80 casing Halliburton float collar 44 J.oints 7".32# _N-80 casing I joint 7" 26~ N-80 casing Burns liner hanger 1.80 ft. 28.85" i 58" 26" 14~17 80" Landed liner @ 8526', top @ 6982'. Cemented with 690 sacks construction cement, dis- placed with 148 bbls. mud, final pressure 1000 psi. Back-scuttled at top of liner. No cement returns observed. Serviced rig and shut down for winter. Robin WilliS','"' Engineer Alaska Consolidated 0il. Co. ~ L~d . INISKIN UNiT OPERATOR, INC. ANTONIO ZAPPA NO. 1 ~LL Section 18, T. 5S, R. 23W, Seward Meridian, Alaska. DescriP~tion of Dito.h sam~Rles~_~ 0-85: Surface clay and gravel. No samples. Lost circu~a,~On.~ round conductor pipe. 85-90: No sample. Shale (driller). 100: Siltstone, hard brittle, medium dark gray, very finely silty, 90%; sandstone, hard fine dense, medium gray, 10%. Trace of carbonaceous material. llO: Siltstone as above, 80%; sandstone, hard medt~ poorly ~orted with dark grains, 20%. Trace of calcareous vein material. ? ~ - V 120: ~_ltstone, ery finely sandy, slightly coarser than above, hard, medium dark ~ay, 80%; sandstone, very fine hard, light slightly buff ~ay with carbonaceous fragments, 20%. Occas- ional slfckensides; sandstone is very tight with some large grains of dark minerals, fractures almost quartzitic. 130: Siltstone as above 70%; sandstone as ~ove 30%. Occasional fra~ents of calcareous vein material. l~O: As last above. 1%0: Siltstone, sandy, hard, medi~ dark gray, fragments less rounded, 9%%; sandstone, very slightly coarser, carbonaceous material. 160: As ~bove- one 1/32" veinlet, tan calcareous, fluorescent. 170: " '~ contaminated with cement ~ · 180: Mostly cement from trying to stop lost circulation. 30% siltstone, less s~dy than above, medi~ dark gray, very fine. 190: Sfltstone, fairly .hard, fragments more rounded, medium dark gray to medi~ gray, very fine to clayey. 200: Siltstone, medium gray, very finely ~an~ ~treaks, slightly buff, & streaks of carbonaceous material; trace fluorescent calcareous vein. 260: As above. 270: Siltstone, medi~ dark gray, very fine to ~haly, 90%; ~an~stone silty to poorly sorted, ~medi~ ~ay to buff, 10%; ,treaks of coaly material in sandstone. 290: As above. 300: Siltstone, fairly.hard, an~lar fra~ents, medi~ gray, finely sandy, 90%, sandstone, coarse poorly sorted with coaly grains. Trace fluorescent calcareous vein m~terial. 3~0: As ~ove. (13-3/8" casing set with hole ~ 3~9', shoe ~ 3~4'.) : As above. Slightly less coarse sandstone. Considerable cement. Streaks of ~lightly softer siltstone, more rounded, finer grains. ~50: Sandstone, conglomeratic, somewhat drilled up into loose grains but solid fragments look hard and tight. Mostly fine poorly sorted but with coarse grains and ~mall pebbles up to 1/8". ~.~edium dark gray, pepper ~d salt, 90%; siltstone as above 10%. Antonio Zappa No. i Well p!,t.o,h., s p e_s 460: Sandstone, very fine ,~. fairly uniform, hard medium dark gray almost siltstone, 90%, coarse sand as above 5%, siltsto~e 5%. One large fragment of mica (from schist pebble?). 470: Siltstone, finely sandy, medium dark gray, 80%; fine to coarse sandstone, dark gray, 20%. 480: S$1tstone, finely sandy, medium gray, 802~; sand~tone, very fine, almost Siltstone, 20%; sandstone, coarse, trace. [~90: Sandstone, very fine, poorly sorted, looks softer, could be slightly porous, medium ~ray 50%; .~iltstone finely sandy, hard, medium dark Eray, ~0%;' ' shale, limy, dense blue-gray, ~; Coarse s~ndstone, ~%. 500: Sandstone, fine, poorly sorted, slightly pepper & salt, medium gray, fairly hard, clayey matrix, might have slight porosity, 90%; siltstone, very fine, almost shaly, blue-gray, 10%; some fluorescence on calcareous vein material. 510: Sandstone, fine, gray, silty, tight, 70%; firm, gray~ sandy, siltstone, 30%. Calcareous vein material. ~ 0 Sandy siltstone ~ ~2 : AOX-. poorly sorted sandstone, as above. . ~tstone, slightly sandy, locally very hard, possibly sllf¢~ cement; ~nd fine, gray, firm, silty sandstone 20%. 550: Sandy Siltstone 70%; sandstone 30%° Increasing amounts of carbonaceous material. ~60: As above. 565: ~;andstone, poorly sorted. Few chips show one rounded edge indicating pebbles of i cm or larger. However, most of the grains are no larger than medium sized sand grains. Silicified siltstone or fine-grained igneous chips were noted, very little calcite. Darker gray than previous sample, varying brown sandstone, cemented with silica. No carbonaceous material. 570: Same ~s above. Some pea-sized pebbles of fine-grained porph igneous rock were identified, probs.bly andesitic composition; chips of this rock also found in 565. 580: As shove but slightly siltier and more siliceous; free silica cementing can be seen with hand lens (on few chips). 90: Same as 580. 00: As above. 610: As a0ove. 640: Siltstone, firm, gray 50%; sandstone, fine gray tight, silty, 20;~,~' shale, firm brittle, 10%; greenstone & chert round and angular fra~ents, 20% in a siltstone matrix. 650: As above, less sandstone and more greenstone fragments. 660: Sandstone, light green-gray, well indurated, fine to coarse and slightly conglomeratic, very poorly sorted, 60%; gray ail ts to~e, 670: Shale, Iig~t gray-grown to medium brown, firm and brittle, dominantly silty a~..d grading locally to light gray-brown siltstone; fair amount of carbonaceous material principally along bedding planes 80%; and dark green firm, flne medium grained, well consolidated sandstone 20%. 680: Ss.ndstone, very poorly sorted, dirty, dominantly fine-grained butwith few coarse grains ranging in size from medium-coarse grains to small pebbles (sub-angular/sub-round) fairly ce.r- bonaceous, ~0%; medium-gray, sandy siltstone [~0%; brown shale as above 10%. Antonio Zappa No. I Well Ditch ~Samp!_eS 690: Sandstone, as above, medium gray with slight tint of brown, little tiigher % of coarse grains a~d small pebbles, principally greenstone and chert ?0%; sandy sil tstone 30%. yO0: Sandstone, as above, very small trace oil sD.on fractures; bright golden yellow fluorescence & fair to good cut. 840: Siltstone, light gray, firm, faintly sandy, 60%; trace of coarse grains and pebbles, some of metamorphic crispin. Sample somewhat variegated, but may be due to carings. 20~, ~ine ttgdut silty sandstone. 8~0: As above, including % siltstone. 870: $iltstone, as above .~0%,increasing in brown-gray silty brittle' shale 10%; sandstone fine and tight; small trace slickensided ~urfaces on sandstone fragments noted. 880: As above. 888: Increase in drilling rate from ~' to ?' per hour. Increase in quartz sand ~ains, trace of pyrite, increase in light gray siltstone, decrease in sandy silt. 890: Same as 888. 900: Same as above. Sandstone, dirty and getting somewhat coarser; some chips ar~ from conglomerate, probably cavin6, slightly limey. 910: Same variegated, poorly sorted sandstone & siltstone as above. 920: Decrease in sandstone., 20%; increase in sand silt 30% silt- s tone as above. 930: As above,. 950: Siltstone, light gray, slightly sandy, contains small per.- centage of larger rock fragments, probably greenstone, trace white quartzose sand, tight and fairly hard. 960: Siltstone, as above, some variegated rock fragments and very coarse grains embedded in siltstone matrix. Not much sandstone. 970: Siltstone as above, with increase in tight very poorly sorted sandstone and rock fragments. 980: Nedtum 'to coarse sand grains and small pebbles in medium gray siltstone and clay ~mtrix. Fairly hard tight and very poorly sorted; trace sllckenslded sandstone fragments. 990: Sm~dstone, light gray firm tight very silty, grading to sandy siltstone; fewer coarse grains and pebbles. 1000: As above; higher sandy siltstone to silty sandstone ratio. 1010: As above. 1020: A~ above, slight increase in brown-gray brittle silty shale. 1030: Siltstone as above 60%, with more coarse grains and small .....~..~ subround pebbles; good trace slickensided fra~unents; thin calcite coating on some of these surfaces. lO~O: As above with ~D,~ silt; 20% sandy silt; 30% sandstone; 10% conglomera, te. 10~0: As ~bove with 30% silt; 20~ sandy silt; 30% sandstone; 20~ .~o conglomerate. V,riegated composition and type of pebbles; very unusual com~ination; fragments of pe~j~atite, serpentine, extrusive? (basic) igneous intrusive (about diorite) igneous, greenstone, gneiss or schist, metamorphic sandstone, chert, siltstone, sandstone, etc., all cemented into a silty sandy conglomeratic rock - very little P & P. 1060: As aDove. Antonio Zappa No. I Well Ditch 10?0: ~0% siltstone, 20% sandy silt, 30% sandstone. Very small amount of conglomerate; sandstone is tig~t, dirty and poorly sorted. $1ickensided sandstone chips; light gray to brown siltstone. 1080: 70% siltstone, 20% sandy silt, 10% sandstone. No ? & P. Light gray to brown. Fine-grain pyrite throughout sample. 1090: S~e a~ 1080, but chip~ ar~ lsrger and fl,.t. lllO: ~0% siltstone as ~bove; 10% sandy silt; 30% light green- gray to light brown-gr~y, fine-grained tight, fairly hard sandstone, very poorly sorted, clay m~trix. 10% brown-gray silty shale, trace ~licken~ided ~urface, thin calcareou~ coating. ll20: ~0% siltstone, as ~bove, 40% sandstone, dominantly fine- grained, clay and siltstone astrix, tight, very poorly sorted, some coarser grains and s~all subround'pebbles 10%. ll~0: 70~ stltstone, light gra~, fairly hard; 10% sandy silt; 20% fine-grained firm, siity/dirty ~andstone & coarse .~ d grains. ll40: Nost of sample ~ust be cavings; it has same appea, rance as ll]0. About ~' times the amount of cuttings a. re coming over the shaker as last night. They are drilling 3;/hr now as compared to ll- 14'/hr last night, therefore at least 90% of sample should be c~.vings. No sand chips were noted with any P & P, but some thin stringers (faster drilling rate, accompanied with up to 4 units of gas) were no ted between 1152 and ll~$O. No evidence of these stringer.~ was noted in sam~le. llT~: ~0% siltstone, light gray, firm, slightly ~andy; ~0% sand- stone, fine gray, very dirty tight, very poorly sorted, fairly hard. Some coarse grains, good trace slickensided sandstone fragments. llS0: Siltstone, as above, with notable increase in white calcareous fragments (vein material?) and white calcareous s~ndstone. Sandstone slightly cleaner but tight and cemented; very small trace oil stain on few of the white calcareous fragments; may have slight porosity. llg0: ~iltstone 30%, light gray to brown-gray, fairly hard; and sandstone, light green-gray-gray to'~brown-gray, fine/coarse, but dominantly fine grained, silty and tight, abundant varie- gated small pebbles probably of volcanic origin. ll9~: ~'~iltstone as above, with increase of very fine-grained white fairly hard sandstone 20%, tight but may halve slight porosity; trace oil stain, bright yellow-white fluorescence and fairly fast cut. 1200: Sandstone ~0%, r.~edium gray, firm and light, very fine-grained with minor coarse grains. Nayhave slight porosity locally. 1210: Stltstone, medium gray, firm, only slightly sandy, with minor ~mounts coarse ~rains and small pebbles. 1220: Si~milar to 1210 with trace of pyrite. 1230: ~0% siltstone; ~0% sandy siltstone; ~0% ~andstone; 10% con- glomerate as ~bove but getting more sand and somewhat coarser, with some a~sorted pebbles (cong.), fragment of horn coral or coral like bryozoa. Antonio Zappa No. 1 'Well Ditch Samples. 1240: 20% siltstone; 20% sandy siltstone; 40% sandstone; 20% con- glomerate increasing in conglomerates and sand; variety of types of chip (from conglomerate), sand fine to coarse and tight, no P ~¢ P. 1250:10~J~ siltstone; 30% sandy siltstone; 40% sandstone; 20% con- glomerate as above; tight blat slightly finer grained. 1260: 10% siltstone; 30% sandy siltstone; 50% sandstone; 10% con- glomerate as above; decreasing in co~.glomerate. 1270: Siltstone 40%; sandy silt 10%; sandstone 20%; conglomerate 20%, dominantly siltstone with gray fairly hard, tight dirty sand- stone; ~inor frag~nents better sorted, etc., fine-grained sand- stone. Small trace oil ~tain on these fragments. Dull orange fluorescence. Cut with acetone. B~ight yellow fluorescence (very small trace)o Cut with col4; cleaner sandstone may have slight porosity but still ver.y tight. 1280: Siltstone 60%; sandy silt 20%, sandstone 10%; conglomerate 10%. Dominantly firm medium gray with slight tint brown siltstone. Variegated rock fragments and pebbles, some of volcanic origin. 1290: Siltstone ~0%; sandy silt 20%; ssndstone 30%; conglomerate Sandstone medium gray, firm and tight, dominantly very fine- grained, fair amount of carbonaceous material; mild efferves- cence with HCC. Dull orange and fairly bright yellow-white fluorescence in washed cuttings. Slow cut with acetone. 1300: Siltstone 60%; sandy' silt 10%; sandstone 20%; conglom, erste 10%. Siltstone medium gray and light tan-gray with disseminated carbonaceous matter. Sandstone very fine-grained, locally slightly cleaner with che~nce of ~li~ht porosity but still fairly hard and tight. ~h~ll blue-white fluorescence. Effer- vesced freely with HUC. 1360: Siltstone 50%; sandy silt 30%; s~ndstone 20%. Siltstone light ~ay with hint of tan, firm, tight somewhat better sorted. Sample fairly calcareous with abundant white calcite vein vein material. Very slightly oil stained; yellow-white fluor- escence and slow cut on so~e of the calcite fragments. 1370: Siltstone, lig~t gray, fairly hard, fair sorting, grading locally to extremely fine-grained quartzose sandstone. Latter may have slight porosity, but still has clay matrix and is probably tight. Small amounts calcareous vein mate~.ial. 1375: Siltstone, as above, sliEhtly sandier, and sandstone, fine- grained quartzose, fair to poor sorting, locally fair porosity, but mostly tight. Fairly good yellow-brown oil stain on the cleaner siltstone, sandstone, and associated calcareous vein material. Bright y'ellow-white fluorescence, fairly unifor~n good cut with ccl4, but fairly slow cut fluorescence dull ~ellow-white. 1380: Siltstone 40%; sandy silt 30%, sandstone 30%. Sandstone and siltstone fairly hard and tight but slightly cleaner, as above. Abundant veinlets of calcite in the silts tone and sandstone. Trace slickensided surfaces; some trace live oil (yellow-white fluorescence). Oil seems to be associated with the fairly p~ous granular calcite vein material ra~he~~ than the sandstone. Antonio Zappa No. 1 Well 1400: Light gray siltstone to slightly sandy siltstone, mottled appearance probably due to weathered feldspars; some fragments have a marked allignment suggesting faulting and or shearing; could represent fault gouge - a lot of slickensided ~urfaces, calcite and a trace of pyrite; few chips of conglomerate of large size, assumed to be carings; trace of carbonaceous material; sandstone not extremely dirty but tigJ~t, slight allignment and or el~0~Eation of grains. 1.410: As above. 1420: No new pebbles or chips noted, but a marked decrease in amount of calcite. 1437: Medium gray to dark gray to brown (when wet) siltstone, trace of vein quartz and pyrite and calcite and carbonaceous material. Very little sandstone and that is very fine-grained. 14 0: Light brown-gray, medium gray (wet) firm/brittle silty shale and firm siltstone, slightly carbonaceous, moderately effer- vescent w/HCL, trace calcite vein material. 1,460: As above, more stltstone, less silty shale. 1470: Siltstone, medium gray, light brown-gray, fairly hard, not as calcareous as before, minor light gray quartzose siltstone, trace slickensided surfaces~ 1.480: S~lt~tone, as above. 1490: As.above. 1530: Siltstone, as above, minor quartzose sandy siltstone, and variegated rock fragments, trace vein calcite, abundant slickensided siltstone frag%~ents. coH #1 (1510-15BO') Recovered approximately 12' of unconsolidated core fragments. No gas, and only very slight trace fluorescence. Lithologically, the core consists of highly fractured and sheared fragments, medium gray to brown-gray argillaceous siltstone, and varying amounts of material that migj~t be described as fault gouge. Fragments range from a few inches to less than 1/8" in diameter and are sheared and slickensided. Thin, but sparse coating of white calcite_pre~ent on most surfaces. Angl~ of fracturing rather steep (est. 70°-80u). A few fragments containing thin interbeds of light gray sandy siltstone occur near the center and toward the bottom of core. Very little reliable evidence of dip because of fragmental core. A few small ~ubround pebbles occur embedded in the siltstone in fragments from the middle of core. Bottom 2' of core show ~light increase in light gray sandy silt.~tone, fairly calcareous. 1550: Siltstone, medium gray to light brown-gray, as above, with minor amounts of fairly clean but tight quartzose, sandy siltstone and very fine silty sandstone; trace slicken~ided surfaces; good trace c~lcareous vein material. 1560: Nedium gray, slightly brownish firm/brittle silty shale and argillaceous siltstone; good trace slickensides; small ~r~ce calcareous veinlets; very little s~nd. 1570: As above. 1590: As ~bove with an increase of ~and and ~andy ~iltstone; tr~ce of carbonaceous material. Antonio Zappa No. 1 Well Ditch Samples. 1600: As above, with trace of pyrite; a few chips of medium sandstone. 1610: Decrease in sand and sandy silt; some large pieces of slicken- sided siltstone; show good fluorescence on .sllckensided sur- face; no penetration of oil into rock, Just in/or on slick surface; cuts readily; very slight trs. ce of oil in mud; not enough to put on log. 1620: As a~ove. 60% siltstone; 30% sandy siltstone; 10% sandstone. Not sheared, fractured or alickensided as above. No oil. No micro or cuttings gas. Oil must be migrating in/and/or trapped in fault gouge type rock above and not present in the unaltered rock. 1630: As above. Larger chips, drilled slightly faster (more weight). 1640: Siltstone, medium gray, firm, argillaceous 50% with 30% sandy silt and 20% very fine silty sandstone, light gray to green- gray; some sorting, but tight and fairly hard. Small trace varie- gated rock fragments and yellow-brown iron stained siltstone. 1650: A~ above, slight increase in very fine grained tight silty sandstone; may have ,slight porosity but no permeability. 1660: Siltstone, light gray with slight bro'~i~h cast, minor amounts of fine grained silty ~andstone; trace carbon~.ceous matter and pyrite. 1670: 3iltstone, as above, 60%; sandy silt 20%; sandstone 20%, light gray fairly .hard, dominantly fine grained with subordinate medium fine quartz grains and few coarse rock fral~ments. Clay matrix tight, sandstone contains finely disseminated pyrite and ia slightly carbonaceous. 1680: As above; decrease in ~and to 10%; trace of oil on mud, none in washed sample; must be out of fractures. 1690: As above; few chips of quartz sandstone wa,~ found; fluores- cense bright cream, saturated with oil good cut, medium fast, showed fair porosity and a little permeability; must have been from very thin stringer; no indication on drill rate. 1700: As above; some siltstone chips show oil stain; bright yellow fluorescen.se on slickensided ~urfaces. 1710: As above; increase in sand, slight; increase in "free" quartz sand grains; trace of pyrite, very little oil ~tain or fluorescence of any kind; very little calcite. "~' 60%; sandy silt 30%; saud 10%. No P & P; no "free" 1720: ~ilts tone Guartz grains. 1740: $iltstone, as above, with 20% quartzose sandy siltstone and very fine grained sandy Siltstone; fair to poor sorting, tight but may have slight porosity. 1750: Siltstone as above with increase in light gray very fine fairly hard sandstone; appears tight, but might have fair porosity; trace calcareous veinlets, very small trace dull yellow-green fluorescence; sligsht cut; very small trace live oil. 1760: ~andstone, very fine grained light gray quartzose grading to ligj~t .,gray sandy siltstone; fair sorting but still appears tig~t-clay matrix; may have fair porosity but low permeability; very small trace live oil, probably emanating from fractures as sandstone is not sattu, ated except on slic;(ensided surfaces. 1770: As above, AntOnio Zappa No. 1 Well.. Dttch Sam_?!e_s_~,_ 1780: Sandstone, light g~ay, very fine, grading to sandy slltstone;~ slight porosity but fairly hard and tight with brown-gray argillaceous siltstone contains trace finely disseminated pyrite. 1790: Sandstone, light gray, hard, very fine; light gray softer silt- stone, argillaceous, pyrite and carbonaceous material throu?J~out. 1800: ~ame as above, the sandstone quite light color. 30 - 20 - 50. 1810: Decrease in sandstone %, same as above. Sandstone effervesces freely between grains. 1820: Same as lB10. 1830: ~'~iltstone, light gray-medium gray, with slight tint of brown and light gray white quartzose, very fine silty sandstone; very small trace oil stain of fracture surfaces; fairly rapid cut. 18~0: Siltstone, medium-gray, slig~.~tly brown-gray (when wet), firm argillaceous to slightly sandy; .~inor sandstone a~ above; good trace slickensides, calcareous coating. 1850: As above. 1860: Siltstone, medium ~gray, firm, 40%; light gray-brown sandstone very fine grained ~0~ with carbonaceous matter; argillaceous sandy silt~tone 20%;~many slickenstdes with calcareous coating, no oil. 1870: Medium gray silt. stone, sandy; light gray-brown sandstone, same as above. No oil. 1880: Increase of gray-brown s~dstone; very slight trace oil in mud. 1890: As above. 1900: Siltstone, medium-gray, light brown-gray, firm/brittle fairly sandy and slightly calcareous; a minor sandstone very fine, silty, light gray a~d fair sorting to brown-gray and very poorly' sorted, fairly hard, slig~htly calcareous end tight, abundant slicks, trace of calcareou~ veinlet~. 1920: Siltstone, li~ht gray-medium gray, slightly sandy and fairly hard. Not much sandstone, fair amounts light tan-gray argillaceous siltstone, quite calcareous, good trace slicken~ides, thinly coated with calcite. 19~0: Siltstone as above, very' few elickensides or calcareous fractures. 1940: As above, medium-dark ~ay siltstone, and lighter sandstone, no oil, minor calcareous s2ickensides. 1950: As a~ove. 1960: As above. 19~0: As above. 1980: Siltstone, medium-gray, light brown-gray (wet) with minor amounts of light gray quartzose, fair sorted quartzose sandy siltstone and very fine grained quartzose silty sandstone, tight and fairly well consolidated; trna. ce slickensides mud calamreous veinlets. CORE #2 (1982-86) Recovered approximately 5' moderately fractured core fragments anMing in size from an inch in length to l~ feet. ~/2~'~ medium gray firm, dense, argillaceous, but slightly sandy massive siltstone. No flunrescence and no gas. l' highly fractured mud sllckensided siltstone, probably f~ult gouge. Core appears fairly hard and dense but displays slickensided surface when broken. Slig~t trace yellow-white fluorescence; good trace gas. 8 Antonio Zappa No. I Well. Bi tch Sam. ple_~.._~ Core ~t'2 (1982-86) continued. 2, moderately well fractured and sheared, massive siltstone, as above. A thin dru~y coating of white calcite appears on slickensided surfaces as well as some finely disseminated pyrite. Very slight trace of oil stain, only trace gas. l~~' slightly fractured, massive, dense, hard medium dark gray argillaceous siltstone; dominant angle of fracturing 6~°. 1990: ~edium-dark gray' hard siltstone, minor light brown gray' sand- stone; varying calcareous, carbonaceous, slickensided pyrite. 2000: As above; less s~ndstone. 2010: As ~bove. 2020: As above, sligj~t increase in sandstone, few fra.g~nents of buff colored siltstone (cement?). 20~0: Siltstone, medium, gray, brown-gray, as above with thin inter- bedding of light gray sandy siltstone and very fine gr~lned silty sandstone, good trac~ slicks and Calcareous veinlets. 2060: $iltstone, light gray fir~, s~ightly calcareous and slightly sandy, n~nor amounts of very fine grained light gray Guartzo~e, silty s~dstone and very small trace of fragments of small variegated pebble~. 20?0: As above, abundant calcareou~ fragments, probably vein material, good trace of slicks; minor fairly clean but tight very fine s a~ ds tone. 2080: ~edium-gray to light gray siltstone, somewhat softer and minor very fine grained ~ndstone; fair sorting~ may have slight porosity; trace slicks and small pebbles. 2090: Silt~tone as above, increase in light gray quartzose. Very fine sandstone fairly hard and tight, but fair to poor sort- ing, may have little porosity, minor ~nounts round fra~ents .~mall pebbles. 8mall trace bright yellow-white fluorescence. 2100: 20% dark gr~y argillaceous siltstone, firm. 20% sandy .~ilt- stone, medi~nn gray. '60% light gray ~and~tone, very fine grained, silty, hard, e~V~.~~freely with Hcl$ white clayey material in sample - god__clay(?). Some pyrite and carbonaceou~ matter ~'o~ 2110: Same as above; decreasing san~s~-n~. ' 2120: Same as above with further dec~-~ase in sandstone. 21~0: As above. 2150: Siltstone, light grayf medium gray, 50~; sandy siltstone light gray 30%; very fine g~ ained si~ty sandstone 20%; sandstone may have slight porosity but appears tight with clay matrix; very small trace live oil. 2160: Siltstone, as sbove, increa.se in light ~ay sandy siltstone, contains abundant carbonaceous matter; trace pyrite and i~ slightly calcareous. 2170: Siltstone as shove, with increase very fine fairly hard light gray with tint of green-gray sandstone; clay matrix, sltg)~tly carbonaceous with finely disseminated pyrite. 2180: As above; increase in sandy siltstone to silty sandstone ratio. Abundant calcareous veinlet~. 2190: As above; ~O% sandstone. Several fragments of fracture filling pyrite and calcite. Antonio Zappa No. 1 Well Ditch Samples. 2200:Increase in light g~ay to green-gray very fine grained tight silty saudstone. 2210: As above. 2220: " " 2230: " " 2240: " " 2250: $11tstone, 70% medium gray with slight tint brown (wet) minor fine ~ained sandstone, fair sorting but tight and with clay matrix; good trace slicks. 2260: As above. 2280: ~Nedium dark gray argillaceous siltstone, abundant slicks; very little sandstone. Non calcareous. 2290: As above, abUndant slickensides; some ahow very slight trace oil stain; trace small subround pebbles. 2300: As above. Very little s~ndstone. 23,20: " " 2340: " 2350: Siltstone, as above, with abundant white calcite, probably vein material; not very porous but with. slight oil stain; abundant sllckensides and very slight trace live oil. No cut. 2360: As above, 2370: Siltstone, a~ above, abundant slicks, but less c~lcite. 2380: Stltstone, medium gray to li~ht gray; argillaceous to slightly sandy with little sandstone; good trace white calcite frag- ments. 2390: Siltstone as above with increase in light grey to green-gray sandy siltstone and very fine tight silty sandstone; good trace slickensided surfaces, thinly costed with white calcite. 24~0: ~s above with ~race conglomeratic (small pea-size.pebbles) siltstone (caving?). a¢ oI bo e. 2,42.0 " " 2.430: " ,, 2.440: " " 2450: Siltstone, medium gray to slightly tan-gray, firm and very brittle, fairly calcareous; tan-gray siltstone; tr~ce cal- careous velo material. 2[~60: As above, small trace round greenstone pebbles imbedded in siltstone matrix. 2,~0: As above. 2~80: " " 2490: " " 2500: " " 2520: Siltstone, fairly hard, brittle, argillaceous to fairly sandy, medium gray to light g~ay with some light tan-gray siltstone; good trace slicks, sec. fairly calcitic, small trace live oil; bright yellow fluorescence. 2530: As above. Slight increase in light gray sandy siltstone and minor very fine, tight, green-gray silty' sandstone. 25~D: giltstone, as above, with 20% very fine grained, tight silty sandstone and 10% small subround pebbles, abundant slicks and white c~lcareous fragjnents. lO Antonio Zappa No. I Well Ditch Samples. 25~50: As above; no conglomerate. 2560: As above; siltstone and sandstone, very fine grained, limey cemented. 2570: 60% white quartz and calcite fragments; they don't appear to be from quartz sand, possibly quartz-filled fracture(s); chiefly calcite ~nd pyrite; rest is very fine grained sandstone and siltstone,~irm, gray, etc., no gas, no oil. 2~71-78: Coring: ~o recovery. 2585: Lig~t~ gray quartzose coarse siltstone grading to very fine grained, tight silty sandstone, fairly hard and only very slightly calcareous; clay matrix, fair to poor sorting. S~nd- stone is sligdutly carbonaceous and contains small a~nounts of finely di~seminated pyrite. Siltstone, as above, 30%. 2590: As a~ove. 2600: Siltstone, sandstone, as above, calcareous t~oughout, and minute pyrite crystals in grayish-green mud~to~e. 2610: ~.edium gray silt~tone, light gray sandstone (30~), hard, very fine, etc., high % calcite on slickensides and cuttings general, especially associated with greenish amorphous mud stain(?), soft. No oil. No gas. Lots of fracture calcite. 2620: As above. ~hAch calcite, fragments throughout. 2630: Siltstone, as ~bove, hard, brittle, possibly a little more siliceous, calcareous, dolomitic and quartz veinlets, slick- en~ides, trace conglomerate, most small pebbles volcanic origin. 2640: As ~bove. 2650: As above, very little calcite. 2660: Increasing sandstone, light gray, very fine grained, hard, quar tzose. 2670: 50% ligd~t gray sandstone (approaching pn. medium gray). Medium gray siltstone; pyritized carbonacemus matter. 2680: ~ndstone, medium ~ay to light gray; a slight tint of green, tight, very fine to medi~m~ fine with a few coarse fra~nents and occasional small pebbles, very poorly sorted, clay matrix, highly variegated assortm~nt of grain~. Clay matrix sli~'~htly c~lcareous with siltstone a~ shove. 10% conglomerate an~ fragmenta of volcanic rock. 2690: ~andstone, as above and ligj~t gray-brown siltstone. Sandstone is very fine to medium grained with minor e.mounts coarser fragments and wery small pebbles; quartzose to highly variegated. 2700: Sandstone, as above, 40%, fine to medium grain, some fragments greens tone . Siltstone, lig]ut brown-gray ~0%, con- glomerate variegated pebbles, some of volcanic origin. 2710: Chiefly medium gray siltstone, some g~eenish-brown, firm, few fr~gments and grains of quartzose sand, ~harp decrease in s a~ ds tone. 2720: Increasing sandstone, fine to medium grain, quartzose; some calcite, some ~iltstone. 2730: As above, less sandstone. CORE #4 Recovered 1~' conglomeratic, sandy siltstone, medium-gray with slight tint of green; firm, dense, many slickensides, gypsi~er- ous coating on slickensided surfaces. Numerous thin veinlets of white calcite s. nd gyp. Small trace oil stain noted in thin 1/8" veinlet crystalline calcite (fluorescence bright yellow- 11 Antonio Zappa No. 1 Well Ditch Samples. Core ~4 (2736-4R) continued. white). Conglemerats consist.~ of small round pebbles (size range from .5 to 2 cm. in diameter).of soft, green altered volcanic rock (greenstone) embedded In a medium gr?y, ~andy to argillaceous silt~tone matrix. Percentages 20% conglomer- ate, 30% sand, 10% sand~ silt, 40% siltstone. Core is essen- tially massive with vary little sorting, however, the long axis of some of the larger pebbles is at approximate right angles to the walls of the core, indicating that the bedding is probably relatively flat. No apparent ? & ?. 2760: Silts'tone, light brown-gray, firm, some ligj~t gray qua~-tzose, siltstone, minor cong%omerate. 27~0: Conglomeratic (pebble size and sm~aller) siltstone and aand.,t.one. 2760: 60% light gray to white sa~dstone(?), very fine-grained, cal careous cementing; calcite coating (fluoresce) on fractures; minute pyrite tt~n~oughout, hard, some non-limey, chalk-appearin~E, milky white while washing sample out (limestone(?)). 2790: Light gray to white ~kuartzose, very hard "sandstone", very fi~e g~ained, pyrite and-/0~'~io~i~ t~ughout. Aphanitic granite. Some darker very limey fragments with bog-appearing carbonaceous matter. Light, tar stuff is almost vein quartz in appearance; granitic boulder (?). 2800: Sandstone, light gray', slight tint of ~reen, dominantly fine grained, fair ~orting, but tight and fairly hard (may h~ve slight porosiby), clay matrix. ~inor brown-gray (wet) silt- s tone and silty shale. 2810: Li~.~ht gray, fairly clean, but tight quartzose, sandy siltstone and very fine grained quartzose, 'tight, silty. ~andstone cuttings ~nd hard, brittle and probably a little more siliceous. 2820: Chiefly light gray very fine grained sandstone, hard. 2840: Sandstone, very fine Mrained, tight, hard, fair to poor sorting, possibly slight pomosity, dominantly quartzose, with siltstone, as above, and crystalline calcite vein m~terial. 28~0: ~ above. '55 chiefly light gray sandstone, very fine, ap- proaching fine to medium grained, pebbles, some black silt- stone; gray siltstone. 2860: Sandstone, pebbles, silts~one. 2870: Li~ht gray, very fine-grained sandstone, firm to hard, sli~ht to medium effervescence with Mcl. Trace carbonaceous ~atter. Ninor.silt~tone. Trace pebbles. 2880: Same as above. 2890: Nedium ~ay (dark gray when wet), very fine grained sandstone, ~rk~o~si~ appearing - feldspars slightly altered - firm to hard; trace of carbonaceous materi~l and ~race of pyrite, trace of calcite, trace of pebbles; slight effervescence. 2900: As above. 2910: Light gray siltstone and very fine sandstone; increa~e in amount of free quartz .~and grains; trace of pebbles, calcite and pyrite. 2920: ~.~edium gray silt~tone, fairly clean (non-argillaceous); light g~ay clean sandstone, verp~ fine grained, effervesces with slight to freely; li~ht~.. ~av~ tight silty very fine sandstone; few f~'~ents of andesitic gray mottled white and black rock; few fragment~ of dark brown sl~te, hard, brittle, white marks (oval outline) on it; minor calcite, ~ebbles. 12 Antonio Zappa No. 1 Well Ditch Samples. 292~: 70% light gray (wet) very fine grain sandstone (?), effer- vesces freely, not h~rd or brittle. Possibly a sandy lime- stone; minor siltstone and pebble fragments. 2930: Same as 8bore, hardly any pebble or foreign fre~nents. ~ilty quartzose sandstone. 293~: 80% light gray sandstone, effer- vesces slight and freely, quartzose, very fine grain, clean tight, minor siltstone ~nd silty shale. 2940: Same sandstone as above (70%), minor silt.stone. 2960: As above. Le~s aand (40~),,~ . Trace of oil and flouroscence; slow cut, increase in calcite and fractured and slicken~ided surfaces. Oil stain on s~e slickensides. 296~: As above. No oil to speak of; still has calcite pr~nt al- thou gl~ less. 2970: As aoove. 2980: 50~ sandstone as above; medium gray siltstone; few pebbles of andesitic type rock. 2990: ~0% light gray sandstone, hard effervesces freely, quartzose with calcareous cement. Light gray siltstone (sandy) effer- vesces slightly, firm. Carbonaceous matter and pyrite through- out. No oil. Appears to be quite tight; pebbles. 3000: As 3010: Getting finer grained. No conglomerate increase in amount of siltatone; still lime cemented; trace of pyrite; very little calcite. 3020: As above. 30)0: As above. 30lgO: 50% light gray sandy siltstone, firm. Sandstone, lig)~t- medium gray, angular quartzose fragments, pyrite, calcite; no oil sigh. 30~0: Light gray siltstone predominantly with light gray very fine ~ain ss~ndstone; cherty pebbles; minor calcite, no pyrite seen. Effervesces freely. Very slight trace oil with calcite @ 3o55. 3060: As above with good ~r~ce of pyrite and very slight trace oll as 30~ (No live oil in cuttings or mud) few oil-stained chips of sandstone, very little if any P & P. 3070: As above; sligJ~t increase in sandstone. 3080: As above. 3090: As above, without conglomerate; slight increase in sandy siltstone. 3100: Non limey siltstone; llmey sandstone with carbonaceous matter; pebbles of quartz with pyrite throughout, dark volcanic type rock, and semi granitic type; not over 10% of sample. 3110: As above; sandstone, very fine grain. Some calcite. '.7;li!~ht trace oil stein on calcite on slickenside surface on piece of cavings. 3120: Chiefly medium light gray siltstone; few fra~ents calcite. Some fragments of black, jet black, hard but friable tar with conchoidal fractures; slow light yellow cut with Col4. No oil. 3130: As above; very, very slight cut. No tar found. 3140: As aoove; slight increase in sand (~0%). No P & P. 3150: Medium light gray siltstone as above, back to 30% sand and 40o ,,~ siltstone. An6onio Zappa No. 1 Well Ditch Samples. 3160: As above, slight decrease in sand (to 20%). 3170: As above. 3180: As above. 3190: ~edi~nm light gray siltstone, tight, firm. 20% quartzose sandstone with limey cement, some feldspar, and trace of oil stain, pale yellow, slow cut, fine grain. 2% particles of asphalt or tar, pale yellow, slow cut ~'~ 3200: Siltstone and medium gray sandstone, no tar, no oil. come me dium 3210: Chiefly medium gray to light [~ay all,stone. ~' g~ra.y sandstone with minor pyrite. No calcite, no slickensides. No oil or stain or tar. 3220: Siltstone (medi~n~ g~ay ~nd slightly ssmdy); medium gray sandstone, tight and silty, few ~hips of quartzose send- stone, clean but tight; no live oil; few small chips of tar; calcite; no pyrite; dry ~ample. Cuts slight & L~low with CCI~. (will not cut wet san~ple). Wet smmple cuts fair with ac e ~o ne. 3230: As above. 3240: As above wi.th decrease in sandstone. 3250: As abc ye. ~..~. ~ 3260: As above, slight increase in ~sndstone, increase in micro reading on gas and p.vap..Slight trace live oil in mud ~nd cuttings. 3270: CORE #5 (3270-3281) - F~b. 20, 1959. (Four treys) R~covered !0,8'.'70~71~ medium gr~y siltstone, massive lime cemented h~rd calcit~ v~ins, trsce of c~rbon~oeou~ m~teri~l, contact ~'71~ is 46°. 3271~-72: D~rker gr~y siltstone. Contact ~'72 is 45°. 3272-72.4: Lfgh~ gr~y v~ry fine grained silty s~nd; no P & P; Quartz ~nd feldspar ~ith silty ground mares limey; good oont~¢t ~ 3272.~- 43°. 3272.4-72.6: (to ~nd of tr~y #1) ~edium dark gr~y ~iltstone, limey, ~lightly more fractured than section ~bove. 3272.6-73.7: (Tr~y #2) As ~bov~ (from 72.4) Continuation of medium d~rk gr~y siltstone; calcite end oil in fractures; slow CC14 cut, ps. lc whitish yellow. Entire 1.1' is fractured as mentioned although £P 3273 plus to 3273.3 a lighter ~ray band of light gray sa~d as found ~P 72.2 to 72.4; then back to the meditum dark gray siltstone (all this section is rather highly fractured). The contact ,.~. 3273.3 is distinct although wavey ~iP 37°. 3273.7-74.0: Light gray sandstone~ very fine grain indistinct interfingerlng contact ~z] '74 of 35° plus or minus. 32.74.-74.4: l~edimm gray siltstone. Contact 38o plus 'or minus. Indistinct. 3a74.4-74.9: Light gray sandstone. Contact 30o plus or minus. Indistinct. 3274.9-75.3: Medium gray siltstone. 32'?5.3-75.,~:(Tray #3) As above. ~po very indistinct. 327~.4-77.4: Two feet of mottled~ light and medl~nn 8.~ra~y sll. - S W' " O tone -~th ind'~stlnct contact @ 77.~ of 31 plustor minus. 14 Antonio Zappa No. 1 Well Ditch Samples. Core #5 (3270-3281) continued. '3277.4.-78.3: Medium dark gray siltstone. 3~78.3-79.7: As shove. Nedium dark grs.y siltstone with meditnn and light gray siltstone; indistinct, varied wavey contacts. Typical "turbidity current" type of deposition. 3279.7-80.3: Good contact @ 79.7 of 30o plus or minus. Dis- tinct but wavey. Light gray sil tstone. 10.3' to 10.8': (end of core) Hig, hly fractured; calcite veins up to .05' thick; high angle fr~ct~,e~; slight slow pale whitish-yellow fluorescence tn or on veins and fractures. (Frnctures and clean breaks from 50o to ) NOTE: 10.8' recovered. Drilled 11.0'. Pyrite was noted thc'our- out most of core. Entire core is composed of fast de- posited turbidity current-type deposition; cs. lcite in.. mo:~t of fr~ctures. Fractures are predominantly perpenGzcular (plus or minus) to the bedding. 3290: As in core. Siltstone, light to medium gray, firm, limey massive, tight, with pYrite throughout; varyiDg amounts of calcite, carbonaceous matter; very' little sandstone. 3300: As above. 3310: As above, 3320: As ~bove. Some sandstone, light gray, very limey, some pyrite. 3330: As above. 10% sandstone, limey, with pyrite. Rest is siltstone. 3340: Siltstone as ~bove.. 33~0: Siltstone as abo'~e. 3360: Siltstone as above. 3370: Siltstone. 3380: Siltstone. 3390: Siltstone, no change; 10% li~t gray limey sandstone. 3400: Stltstone as above. Very. little s~dstone. Few chips of light bluish-~ay, non limey, soft "shale"' with specks of carbon- aceous matter. O:~e chip shows contact between shale and arkose sandstone. Sandstone very limey, shale non limey. Good contact. 3410: Siltstone, frs. ce light blue-gray shale; 10% light clastic s an ds tone. 3~O: As above without bluish-gray shale. 3430: As above. Only a trs.ce of sandstone; 70% siltstone; 30% sandy siltstone. 3 40: As above. 3~50: As above; 10% s~dstone. 3~-60: As above. No sandstone. 3~70: As above, without appreciable sandstone; trance of shale. 3 80: As above. 3490: Chiefly siltstone; ~nor trace of sandstone end shale. Very slight trace oil in cuttings from previous instr~ent test. 3500: 2iltstone; nothing else. 3510: As above; 70% siltstone; 30% sandy silt. 3515: As above with 10% sand. 3520: As ~bove. 70% siltstone; 30% sandy siltstone. Antonio Zappa No. 1 Well Ditch Samples. 3530: As above. 3540: As above. 355~0: Siltstone as above. ~ l'bstone, seems to be browner in color with less homogenous 3560: look, siltier looking (??); no sandstone, no oil, no shale. (Silts tone i s limey) 3570: Aa s. bove; changing to brownish gray. 3580: As above. 3590: As above, with les~ ~andy siltstone and ~ome brown soluble mudstone. Siltstone is turning to a brown or brownish-gray when wet; looks gray when ~y. 10% mudstone; 70% siltstone; 20% s~ndy silt~tone. 3 00: a' ove. 3~10: " 3~20: " " 3~40~ " " 3650: As above. Practically all brownish silt.~tone, no c~lcite, very little pyrite; no shale, trace of sandstone; soluble mudstone coloring the mud. 3660: A~ above. ~70: As above. 3680: Increase in mudstone, 20%. 60% sil~tone; 20% sandy siltstone. ~dstone is hilly slickensided and could possibly be an indurated fault gouge. ~o c~lcite or pyrite to speak of; Just a trace. 3690: As above. 3700: Decrease in mudstone 10%. 3710: No Edstone, back to 70% brown siltstone and 30% brown sandy siltstone. N0 slickensides. 3720: As stove. 3730: Brown siltstone; no sandstone or shale, very little calcite, ~d pyrite. Soft broEish ~udstone in the cuttings which dissolves upon washing..Parallel edges on several chips sug- gesting bedding or frs~cture p~tterns, more~likely the latter as no bedding visible in any chips. Few ~licken~ides, possibly from folding of formation. 3740: Siltstone as above, chiefly, but 10-20% appears to be medi~ to dark gray as before the brown. Mothing else. 3750: As above. 3760: " " 3770: " " 3780: " " 3790: " " 3800: Stltstone (same as above), slight trace of oil in mud and 3810: cuttings; appears to be rig oil (diesel o~~ kelley swivel) 3~20: Siltstone, b~oEish etc., as above. 3830: As above, with i0-2~% san(istone. 16 Antonio Zappa No. 1 Well Ditch Samples. COHE #6 (3823-3833) Recovered 8-8.5'. The entire core is brown siltstone; slishtly limey throughout with very limey zones; very dense, massive; fr~ctured and broken throughout; following fractures and angles noted: e 3824.1 - 2~° 3827. o - 3825.0- 3825.5 badly fractured, angles from 2~-40°, large broken pieces. 3826.6 - 3828.5 very badly fractured, recemented or calcite, but not tightly, all directions and angles; core still intact. ~ 3828.2 Distinct fractures in above zone 41°. ~ 3828.7 " 3829.2 to end of core: tray full of fragments, and pieces of broken core, very badly fractured zone; last 0.2 feet in tray is solid siltstone again. ~o fracture angle of one larger broken piece (light brown mudstone on face). Calcite 1/16" thick on most main fractures, ~.lso slicken- sides on fracture faces. @3823.5 sandstone, a hint of s~nnds~one band i - 2" thick, barely distingui.shable. Dip of contact 26-27°. Couple of pieces of fine to coarse grain sandstone found in broken section S8~9.2-3833. Helationship to siltstone not determinable. Light oil stein on all fractures, very fast cut with CC14, very whitish yellow. 3840: As above. 3860: " " 3870: Formation as above but not fractured or slickensided. No oil or oil stain. No ca. lcite;~ trace of sand and pyrite. 3900: As above. 3905: Formation as above, fractured with calcite and oil st~ins; very little slickensides; 10% sandstone; no P&P; cut on fractured surface pale whitish yellow. Fair on selected pieces. (March l, 1959) 3910: Red-brown siltstone, less firm, very limey to slightly limey, fracture faces on occasional chips; slight tr~ce oil. stain on elickensided surf~ce or assocated with calcite in fractures; no pyrite; very little calcite; very little sandstone; sandy siltstone. 3920: As above. 3930 " ,, 3950: " " 3960: " " 3970: " " 3980: " " ~990: " " , 000: " " 4010: " "' 17 Antonio Zappa No. 1 Well Ditch Samples. 4020: As above with 10% increase in very slightly celcareous sandstone, whitish-gray fine grained, quartz and feldspar, clean, tight, no oil or fluorescence in sandstone. Very slight trace of oil on a couple slickensided chips. 030: As above. Less sandstone. 040: Red-brown siltstone, very little calcite, pyrite, ~and~tone. Fracture f~ces on chips; few slickensides. ~050: As above. 4o6o: above, s~,ightly more ~alcite and a little oil with calcite. 10% ~andstone as in 4020. Could possibly be csvings from that zone. 080: As above with 10% soluble mudstone. 090: As above. ~100: " ll0: " " 120 ~ " 130. " " 140: " " ~0: BroE gray siltstOne, firm, calcareous with minor calcite cemented, quartzose sandstone m~d calcite. Slight trace of oil in mud and unwashed cuttings. (4152-41~ plus or minus): Good trace of oil on slickensides and calcite; fast cut with CCI$., pale whitish yellow; can see oil with Hcl added. Fault ~one(?) contact; pass into light blue-~ay, very hard, very slightly calcareous shale. Slight drilling increase through fault (?) zone. ~,lud washes out mil~, formerly brownish. 41 o : Chiefly brownish si ltstone (60~%) with 10% shale; 10% i170: 180: 190: 200: 10: 20: 30: 50: 260: Siltstone as above (60%); 20% sandy siltstone; 270: As above without calcite. 280: As above. sandstone; trace volcanic type pebbles. Sandstone is light gray', quartzose with feldspar and calcite, very fine No oil in mud or cuttings. As above. Il As above with sligjut increase in light blue-gray shale. 70% brownish siltstone; 20% brown sandy stltstone; 10% shale. As above. As above. As above with no mudstone. 80% siltstone (brown); 20% sandy siltstone. 20% calcite. C0~E #7 (4286-4293) Recovered 5.5' The overall core is brown or brown-gray siltstone; tight, massive, firm, calcareous (varying), with bands of light gray-brown mudstone. Contacts h~zy and gradational to good. Pos.~'~ible plant and/or animal fossils. Core intact, solid. No fracture or fa'ult zones. 18 Antonio Zappa No. 1 Well Ditch ~, mples Core #7 (4286-4293) continued. 4286-4288: Gray-brown siltstone with couple small (less than 1/2") lenses of mudstone. 4288-4288.8: Zone of light medium pay mudstone; upper contact quite clear; dip 22-24o; lower contact very gradational of light and medium gray muds tone and brown ~tltstone, dip 23° (plus or minuS); darker forms in mudstone su~oesting fossils 4288.8-4290.2: i3rown siltstone. ~ 4290.2 is contact from light gray mud,~tone into brown siltetone, sharp contact, dip 30o. Upper contract of this n~:dstone is very indistinct, approximately 0.4', no dip discernible. 4290.5: Center of 1~-2" bend of cmrbonaceous mudstone; dip 26°, upper contact indistinct, lower contact clear. ~290.2-4293: Brown-gray siltmtone, ~iias.~ive, tig)~t, firm. Three fractures with the mudstone "bedding"; one fracture oblique; 37° across "bedding, minor cmlcite in recemented cracks; none with the above menbioned frsctures. At bottom of core is 1/16" calcite band with trace of oil, yellow fluorescence, pale whitish-yellow cut with CC1,4. No other oil seen in core; no s~ndstone; no apparent ;-&P. 4300: S~..ltstone as in Core #7. No sandstone, very little calcite; no. oil. 4310: Siltstone as above (brown and very fine) 60%;sandy siltstone as above, brown, 20%; sandstone,, light gray, quartz and feld- spar, slightly friable, very little P&P, very fine grained; no oil or stain in sandstone, 20~. Very few chips of calcite, s c~e have visible oil stain and show fair to good cut; trace of carbonaceous n~aterial; no cut. 19 Antonio Zappa No. 1 Well Ditch samples. March 12, 1959 4320: Si!tstone, brown, 70%; sandy siltstone, brown, 20%; mudstone, brown to brownish-g~ray, 10%. Trace of calcite and pyrite. No slickensides or oil noted. Slightly limey. 4330: As ~bove. 340: ,, ,, 350: Brown si!tstone, slig~tly calcareous, 60%; brovm sandy silt- ~tone ~0%; 10% hard brown calcareous s~.~dstone. 360: ~sme as above, but with only trace of ~andstone. 370: Medium gray ~iltstone, li~ey, hard, somewhat coarser gr~ined than brown ~ il ts tone above, ~0%. very fine grained ~nd~tone, quartzo~e, ~; argillaceous. Sandy s~.lt~tone 302~. 4380: Medium gray siltstone as 4370, sandy siltstone (quartz grains in the siltstone) and very fine grained sand~bone. No oil, calcite, or fluorescence. Tr~ce of pyrite. 4390: Siltstone, comae a~ ebove. 30% s~ndy ~ilt~tone; lO~ sand- ~tone. No oil; trace of calcite. ~J~O0: Silts~one, gray, s~ above, hard. ~.lO: As above. " " ~~,," '~,, . Increase sandy siltstone. " .60: " " ~70: ~iltstone as above and sandy siltstone. ~80: 50% of siltstone is very light gj~ay, limey hard, ~andy, etc. 10% trace of conglor~t~e~ PSbbi~~. Very little calcite; no slickensided chips; minor pyrite; no oil or fluorescence. ~90: 40% slltstone; 40~ sandy siitstone, as above, with 20% sand and small ~ount of carbonaceous material. No cut, but 40 units Ctt~, in cuttings; ~ight; ~o P&P. No oil, minor pyrite as above'(also calcite) 20% oI the sandy ~ilt~-~tone was a dark gray-brown. [~00: ~0% ~tlt~tone; 40% sand slltstone; lO~ ssnd. Trace of pyrite and calcite. No cut; slightly limey. 510: As above. 520: Light and medium ~ay siltstone; some sandy as above, slightly calcareous; so~e pyritization of carbonaceous material (bl~ck, very limey, wood appearance). Trace of calcite. ~530: As above. , As above A's above. 4%60: As above with more calcite and 10% soluble clay stone (could be fault material). No cut. 4%70: 70% dark brown (oil-saturated-stained?) slltstone; 10% medi~ gray s~dy siltstone; 10% very fine grained s~dstone; 10% san~. ~0/15 total gas/pv on micro mud; both off scale on cuttings micro. Slow yellow cut with Ccl4; show of oil in unwashed cuttings, more in mud' 90~' ~- = ~ fluorescence in watched cuttings; much calcite; oil visible in ~d with the calcite. Appears to be tight. &ST2: Practically all bro~ oil siltstone, as above. 2O Antonio Zappa No. 1 Well Ditch Samples i5~575: As above, possibly less brown oil siltstone. 580: As above, with oil in mud, cuttings and washed cutting. 85: As above. 4590: Increase in calcite- white (Bull) quartz, pyrite. Increase in overall lime content. CORE #8 (4577-4591) Recovered 14'. Overall core is brownish-gray with medium gray, hard, tigt~t siltstone, oil-stained throughout, with pinpoint fluorescence, with visible oil associated with calcite on fractures and oil sheen on slickensides; ;yellow fluoresce, very slow pale yellow to yellow-white cut with Col4. No bedding apparent. / 4576-77: Lig~t brown siltstone hard, massive, sligh.tly limey, ~" fractured and recemente~ with calcite last 0.b foot. /16". calcite layer with oil on fracture of 300 @ 577.4. Slight oil stain throughout, pinpoint fluores- cence; negligible cut with Ccl4, over long time. 4577-91: to end of core is medium gray siltstone with varying shades of light brown; none as the dark brown in cut- tings at 4570 (plus). Hard, slig~xtly limey, massive, with visible carbonaceous material and oil stain, · yellow fluorescence, negligible cut. .~79-?, Fr.actur. with 1/8 ca~ci~e, slicken~ides, oil stain 37°. 4583.5-85.5. Core solid, intact. Half the core is tightly re- cemented fracture zone of calcite with oil and oil stain throughout calcite. One 3/~ inch band of calcite filling r~nus around core; dip ?l°. No dip on other two feet as it lies on one side of core; does not pass through. ~J.I~87.4 and 4~87.9: fractures, prominent slickensides with oil, each 53o. 4586-87: Zone of lightly fractured recemented with calcite, core intact. Last £oot of core broken where removed with difficulty from core catcher. Can safely conclude the heavier oil stained zone en- countered at ~570 (plus) had been passed through. Chromatograph showed methane predominant gas during the "show". High of 65 (methane), 13 (ethane), 7 (propane) @ 4~72. Hig, h c~omatograph reading of 85-25-20 while reaming out. Chiefly methane seeped in during trip. "Gas" was noted bubbling from core in couple of places shortly after removed from core barrel. ~4600: As .~61o: As ~630: As As ,~690: As kT00: As 710: 720: 780: above; more medium gray, less oil stain, slight slow cut. above. 10% more sandy siltstone. above. 10~ less " " (as ~600). above. above, slightly coarser and trace of pyrite. above. above. above, slightly finer grained, could almost be called a mud stone. As above. 21 Antonio Zappa No. 1 Well Ditch Sample s 4790: Siltstone, light brownish gray, very fine, as above. : As above; very fine sil tstone. 486 : As above; " ,~9890: " " " " " O0: " " .4920:1/3 very light gray, firm ltmey siltstone. 930: As above withou$ light gray. 9401 A, above. ,4950 " " .4960: As above with light gray mudstone. .~0:: As above. 0 ~t 4990:" " 5000: " " 5010: 50%~ of the silts~one (70%) is lisht gray, ?li~h~ly limey. 10% very fine grained limey sandstone; 20% li ~gj~t gray firm mudstone.. 5020: As above. 50~0: " " 5040: " " 5050: " " 5060: ~edium gray firm limey stltstone as above with 10% dark siltstone or very fine grained sandstone, either carbonaceous matter or oilstain; pale yellow fluorescence; couple of drops of oil form when Hcl (Very limey) attacks; bright yellow fluor e sc ence. 5070: Dark brown siltstone increasing to 20%, pale yellow fluor- escence, very ltmey, 75/20 on cuttings micro gas/pr; driller reports suction acting like fractured, hanging up bit somewhat. 5080: As a!~ove; oil stain, carbonaceous matter and pyrttized carbon- aceous matter apparent in cuttings. No free oil. 5090: As above. 5100: High percentage of fractured siltstone recemented by calcite, oil associated with calcite, visible in unwashed cuttings, ?0% fluorescence (oil and calcite), yellow; otherwise ligj~t and medium gray siltstone as a%~6~'~ ~ittle of the dark stuff. 5105: Siltstone; light and medium gray as above; sharp decrease in calcite and oil and cut. 5110: Siltstone as above. 5115: Siltstone as above ~ith 20% sandstone; no oil; sandstone light gray, fine grained, quartz and feldspar, slight P&P. 5120: Siltstone, as above. Sandstone, as above; has slight P&P, no trace of oil in it though. 13O: As above. 140: " " 5150 ~ " " 5160 Medium gray siltstone, very light oil stain, fluorescence, but no Ccl4 cut; trace sandstone, firm, tight, limey. 5170: Sandstone and sandy siltstone; no oil stain, very little calcite. 5180: As above. 5190: Siltstone and sandy siltstone as above, slight to fair out~ slow, no oil in cutting or mud, dull yellow fluorescence throughout most of siltstone chips; no petrol vapor on micro or ch~omat., tig)~t, no P&P. 22 Antonio Zappa No. 1 Well Ditch Samples CORE #9 (5195-5205) Recovered 1~0.0 f~et. Overall core is a medium brown-gray siltstone, tight hard, massive, except for bahds of ver~' light gray siltstone 1/2" to 1" blending off into~ the medium gray siltstone, usually with a sharp contact on one end of short section and very hazy indefinite contact at other end; some very typical tur- bidity current type contacts and/or sloughing type or com- paction distorted. Slightly calcareous. Slight yellow fluor- escence with ~ome bands of brown mudstone having elongate outline darker brown, parallel to contact with medium gray. No fracture systems or single fractures at all. Core intact, but broke easily after air and water hit it, breaking at ~tght angles to core, with concave convex hackly fracture; last one foot was intact but on the verge of shattering into many pieces. No oil seen, or Ccl4 cut. Some possible very light oil stain or oil sheen seen on some fresh surfaces when broken with hammer; very light yellow fluorescence, no cut. Light gray siltstone bands much more limey, more fluorescent also due to calcite cementing. @ 5195.6: Very light gray~ siltstone, sharp contact~on one end, hazy on ne~t d~p 34° . @ 5797.2: l" band siltstone with darker elongate forms, very fluorescent; dip 27o. ~ 5197.6: Lt~t gray siltstone, dip 2~° ~ 5198.0: " ~" " dip 2~° ~ ~ 5198.6: " " " dip 23°. @ 5199.2: 1" band lig~t gray stltstone, dip 29°, darker with fluorescence. ~5199.5: l" b~nd light gray siltstone, dip 29°, d~rker with fluorescence. ~ 5202.2: ~ii band li~ht gray siltstone, dip 26° ~ 5203.~: " " " dip 22° @ 520~.8: " " " " " dip 360 @ 520~4.5: " " " " " dip 22° @ 520~.9: Lig~t gray-brown with forms elongate, parallel contact, fluorescent, dip 22°. ~i very fine, as above. 5210: .~ ltstone, 5220: As ahoy% with considerable increase in calcite (fairly large, up to 0.4 cm frag~nents, good clean white, must be fairly thick veins or fractures.) 5230: As above, with less calcite. 5260: As above. @5266- drilling l. ate change. 5270: Mudstone, 10% as above; siltstone as score, 20%; sandy siltstone as above 10%; siltstone, white to light gray, limey, no cut, 40~; sandy silt~tone, white to ligj~t gray, ltmey, no cut, 20%. Trace of black stringers in white siltstone and sandy silt- stone. Does not cut. 5280: Cuttings wash out milky white 60% light gray and white as described above, hard, brittle, limey, sandy siltstone; 10% mudstone; 10% very fine light brown-gray sandstone; 20% brown gray siltstone, trace dark conglomerate pebbles. 23 Antonio Zappa No. 1 Well Ditch Samples 5290: As above, the light gray siltstone being a shade darker, same percentage. 5295: As above, increased gas reading. 5300: As above, less very light gray material; same gas. 5320: As ~ove. 5330: As above with slow cut from bigger chips of brown-gray silt- stone (slight and Slow cut). Chunks are most probably carings (only a few). 5340: Swinging back pretty much to medium gray-brown stltstone, some light gray and very light gray, but minor; goodly amount of carbonaceous material; lineation of same in many chips suggest- ing bedding planes, calcareous, therefore much fluorescence throughout; trace oil in unwashed cuttings; no cut obtained from cuttings; few chips of pebbles, volcanic origin. ~33{~:: As,, ~bove.,, 5370: 5380: 5440: 54 o 5.470: 5480: As above, good trace pebbles (conglomerate) throughout. As abc ve, " " " I! t! I~ Tt ~$ Medium dark brown-gray siltstone with increased carbonaceous material, lineated, varying amounts calcite, good trace conglomeratic material throughout. As above. Fracture zone, much calcite, same siltstone as above, trace of oil in cuttings, probably associated with calcite. Con- tacts, visible on chips, as those seen in cores; mudstone, medium gray siltstone, sandy ~iltstone with elongate darker forms. Lineated c~rbonaceous material' (bedding planes). 5500: As above. 5510: As above with 20% calcite; trace of oil in cuttings. 5515: As above with 10% calcite; trace of oil in cuttings; slight cut; trace of oil in .mud. S~mple looked like those above. 5~20: As above with less than 5% calcite, slight cut, no oil in mud or cuttings. 5530: As above wi th increase in calcite. 5%0: As 5550: As above, carbonaceous material throughout, much calcite, slight trace of oil in washed cuttings. 5560: As above (sample); no oil in washed cuttings; trace of oll in unwmshed cut tings. 5570: As above with ~light increase in number of chips of hard sandstone; fairly tight; slow cut. %580: As above with increase in calcite, still has trace of oil in unwashed cuttings; slow cut. 5590: A~ above with decrease in calcite, trace of oil in unwashed cuttlngs; slow cut. 5600: As above; very scant trace oil in unwashed cuttings. 5640: As above.. Antonio 'Zappa ~9- 1 Well Ditch Samples,. 5650: As above, wi th slightly more chips, very fine grained ligjut gray sandstone. 5.660: As above, with varying calcite and very slight trace oil (with). 56.70: As above without oil. 5680: As above. 5690: As above. 5700: As above, very slightly coarser, still a few chips of light gray sandstone; no oil. 5710: As above. 5720: As above, seems darker brown-gray. CORE #10 (~723-5732) Hecovered 8 feet. Overall core is dark brown-gray siltstone, with lifr~hter gray band~ of calcareous, sandy siltstone, in one place approaching a very fine-grain sandstone. Bedding range.q from distinct to hazy; dips 4~°, 57°. Core mostly intact except for bottom foot or more where ran back over with core barrel before pulling out. Nest breaks across the core, not much tendency to break along bedding. One recemented fracture system @ 5720.5 (plus or minus). Oil stain and sheen on slickensided surfaces, slighg trace of oil with calcite on some fractures. 5723-5726: Dark brown to brown-gray well bedded tight hard siltatone with lighter ~,[r~y section from 5723.2 to ~723.7 and from 57~4.~ to 57~4.4. i/8" calcite moas with trace of oil on fracture across core at ~72~.2. ~5723.4 break parallel to bedding, little calcite, slight trace oil stain. @%725.6 slickensided fracture across core @ 34°, calcite and heavy oil sheen. 572'6.0-5727: fracture zone wi th main fracture across the core at ~0o, very irregular, partly recemented with calcite; trace live oil in mmuy smaller accompanying fractures; three heavily slickensided fractures; fast yellow cut with Ccl4, across the core ~32-34° at about 5726.1 to 5726.3 (Just bef6re the 50o fracture, that is) and would intersect it if extended. Heavy oil sheen on these; fast yellow cut with Ccl4. C ORE 5727. 57~6.5 ~ .... 5726 ~ ~ ~:: ................ 5726 · ~: 50° "-~ ............... 32-34° ',~:~ .......... 5726.0 Dip measured from horizontal as 'though core were vertical. Dip of bedding on top side of fractures is 43°, below fracture the dip is ~7°. 5727-5730: much lighter gray, hazy bedded sandy silts'tone, quite a bit coarser-grained, 57o dip distinguishable, calcareous, which fluoresces. 5730-5732: dark brown well bedded tight hard siltstone, dip 57°. One slickensided oil stained break exactly parallel to bedding @ about 5731. Antonio Zappa No. 1 Well Ditch Ss~mples 5740: As in Core #10, dark brown and medium gray siltstone, 10% very fine grained sandstone, minor calcite. 5750: As above. 5760: As above, slightly sandier (20% very fine-grained gray sand- stone) no oil. 5770: As above, ~lightly darker or browner, 20% mudstone; 50% siltstone; 207~ sandy siltstone; and only 10% sandstone. 5780: As a~ove. 5790: As above, higher gas readings on cuttings but no oil, still has small amount of calcite, have had a very slight trace of oil on mud but no si~ of any in cuttings. 5800: As above. 5810: " " 5820: " 5830:" " Siltstone a dark brown, somewhat coarser, o~ly slightly calcareous, little calcite, little sandstone, high micro readings. 8 40: a ove. ~850: 4D% calcite, 20% calcite and quartz @ 5845, and sandstone grains (quartz), much less micro gas readings and 1/2 less ditch g~s, 60% siltstone of which 40% is light gray to white. 58~3 (plus or minus): 70-80% of sample is quartz and calcite grains from light gray to white, fine to medi~un grained send, tone composed of angular-subangular f~irly well sorted (~ize, that is) quartz grains cemented by c~lcite, predominantly white. Very hard, ~, some chips practically all calcite or calcareous aa limestone. Nuch fluorescence. No oil in mud or cuttings (washed or unwashed). 5860: 80% white ~ndstone, quartz,~ feldspar, calcite, medium to coarse, fairly well ~orted. Angular/~ubangular. Cle~n, hard, tight, no oil visible. 5865: As ~bove. 5870: 30% sandstone as above, 70~ siltstone,dark brown and light gray. 5875: Increase f~om 15 to 30 units total gas on ditch. Fair amount of oil ~in~ mud and unwashed cuttings. None in w~shed cuttings. Cut of washed cuttings slow and very slight, very limey, considerable calcite also. 50% ligh~ brownish-gray siltstone (with some darker), varies from fine to coarse; 20% sandy siltstone (like siltstone); 20% sand~tone, very ~ine,~ gray to light gray (feldspar and quartz, lime cement), ~10% ~d- stone, varies in color from g~ray through blue and/or bluish green to brown. 5880: As above. 5890: As above. Slightly coarser. 5900: As above. ~lightly coarser, with a little more calcite. No oil, mud, or cuttings. 5901: As above, more calcite, good trace of oil in mud and cuttings; 20 unit increase on total ditch gas. No Ccl;~ cut on wa.~hed sample. 5905: As above, less s~d. No cut. This whoI~ section, last 40 feet or so, has had oil-like fluorescence of washed sample, ranging from 10% to 70% fluorescence (including calcite). These chips appear to be oil saturated, but can get no cut even after crush- lng. Could be calcite cement but Hcl does not h~ve too strong an elf, ct; not like could be e×pected with ths~t much calcite. 26 Antonio Zappa No. I Well Ditch SAmples 5910: As above. 5920: As above with further decrease in sandstone (10%), light gray fluorescing siltstone; dark brown carbonaceous siltstone with bedding planes and most of it is calcareous. 5928: Increase gas (ditch) seems to be associated with sandstone, much less well cemented than above, less tight, brittle. Finer grained than above with a few pebbles; 42 units ditch gas; significant increase on chrom?tograph, .poorl~y sorted. 5930: As above, sandstone about 70% of sample, 30% siltstone. 5940: As above with 10% mudstone and only 20% stltstone. 5950: As above, with 30% stltstone; 30% sandy siltstone; 30% sandstone. Trace of black asphalt looking material (2 small chips); would not cut with cci4. 5960: As above. SandstOne 20%; 60% siltstone, of which 40% is light gray/white, hard, limey. 5967: As above with calcite, fractured zone, oil with calcite (CCl4 cut on the calcite). 59~0: As above. 5980: As above with 50% siltstone (chiefly light gray); 30% sandstone. 5985: As a~ove; 40% siltstone, 30% sandy siltstone. 5990: As above. No .oil; less calcite 000: 30% siltstone, 20% sandy silts~one; 50% sandstone. ~eem to be out of main fracture zone. No more oil and considerable less calcite. 6010: 60% li~t blue gray very hard slightly limey massive silt- stone or shale. Very tough drilling. Slight fluorescence; calcite in fractures; 30% brown siltstone; 10% sand. 6020: 70% dark brown slltstone; 20% sandy siltstone and ltgjxt gray/ white siltstone; 10% sandstone. ~60~O: As above, with 20~. sandstone; 60~ stltstone. o040: As above with 30% s~dy siltstone; 50% siltstone. 60~0: As above. 60~0: Getting finer-grained; sample is same as above (dark brown siltstone, 80%;~ 10% sandy siltstone; 10% sandstone) could be very slight trace of conglomerate (one pebble). 6070: ~As~ above; slight increase in calcit~--~ith associated oil. 6080: As above, with calcite and oil and no ssnd. 6085: Am above; not enough oil to show on log. Still dark brown with some darker thin layers. 6090: As above but with oil in mud and cuttings. No appreciable increase in calcite; no oil on washed cuttings; first sample after a trip could be oil and gas associated with trip. 6100: Sample as above with 70% siltstone; 20% sandy siltstone; 10% sandstone; no cut, but oil in mud and unwashed cuttings. 6110: As above. 6120: As above with 70% silt~tone; 20% sandy siltstone; 10% sand- stone; not as much oil. 6130: As above, but darker; less fluorescence (other than calcite). 6140: Siltstone more of a brown gray color with much less carbons- . ceous material. Some calcite with associated oil. Minor smudstone. 61%0: As above, with 70% siltstone and 30% sandy stltatone. 6160: Aa above; increase in calcite with associated oi1. 6165: As above; with occasional oil-stained quartz grain. 6170: As above but without oil on quartz - Just with calcite. 180: As above. 27 Antonio Zappa No. 1 Well. Ditch Samples 6185: Increased oil in unwashed cuttings and mud; increased read- ings. Calcite with oil. 70-30 stltstone; could be highly fracture d. .6190: As in 6185. ~6195: As in~6185. 10% sandstone; less oil. 6200: As above, with even less oil. 6210: As 6200. 215: As abo~ with 70~'~,~siltstone; 20% sandy siltstone; 10% sandstone. 220: As above. 6230: As above. 62~0: As above with few chips of soft black material; looks like carbonaceous; some pyritized; tar appearance. CORE #11 (6249-6262) Recovered 6 feet, of which 3.5 was intact, the rest broken and/or ground up. All of core ia dark brown, chocolate, color, when wet, with ~mall stringer~ of light~ gray siltstone, a few slightly thicker ones approaching a very fine-grained smudstone, outlining the bedding which is predominantly 53o. No main fractures are distinguAishable, many calcite seams cut across the core ~nd bedding with all an~les of dip. Oil is associated with most of ~he calcite. 70% of the core has a pale yellow gold fluorescence of a pin- point nature and under the microscope can be seen.~what I be- lieve are minute globule~ of oll or residue in the available pore space, With CCl~ over a long period of time a pale yellow cut is obtained from the chips, q~e s iltstone is only lightly calcareous, very ha~d, tight. Gas seen bubbling from it. Two thin layer~ of black, shiny, ~oft, tar-looking residue, which gives a pale yellow-white slow cut with CC14. S~e stuff a~ described in cuttings above. 6270: As above (in core). About one-half of siltstone is very coarse, Just about a very, very fine-grained ~and~tone (light to medi~m gray). 6280: As above. 6290: As above, but somewhat darker and no oil in mud Or unwashed cuttings. 6300: As above, very little oil in n~d or cuttings. ~310: As above. · · · with trace of oil in unwashed cuttings. 0320:6330: As As above, above, with ~ ~race of oil in mud and unwashed cuttings. Slow cut on wasnec cuttings. Chips of coal, se ailtatone crushed in CC14 give good.fast cut of cream color. Oil also associated with c~lcite fracture filling. Zone fairly well fracture~. Many chips slickensided without calcite vein filling. Zone is thin. No gr~at increase in gas. 3~5: As above with less ~ll. 3~40: As above with only slight oil. 63~5~: As above with increase in oil in mud and unwashed cuttings. No cut on washed 6350: As above wi~h decrease in oil. 6355: As abo~e, only more gas. Antonio Zappa No. 1 ~ell Ditch Samples CORE.#12 (635.8~6377) ~ Recovered 17 feet. 6358-59~: Dip 84o-85°. Dark brown har~d, ~ttght stltstone with light gray bands silts~one. ~6358~ clean break with 1/8" calci~te, _dip 64° (more so across the bedding than "with it.) 6359-~ end of 1st tray. 6359~-6362~: D~ark brown siltstone with light gray bands; not over 1~4" wide; bedding 85O~ip. F~om~636.1-6362.7, clean break,~' p~arallel bedding, no calcite, b3b2~ end of 2nd tray. (6360-6361 core is broken~. ~ 6362.7, break across core ~ 45 inter~'ecting long break noted above. No calcite, no elickensides, Just a break. @ 6363.2, break with 1/16" calcite across core ¢4 40°; bedding continues @ 85° as above. 6365.5 end of 3rd tray. @ 6366.5, bedding becomes parallel to core or dip 90° , light gray banding 1/2"to 3/4" wide. Rest is dark brown stltstone. @ 6366.~, 1/16" calcite and fracture 40o across Core. Re~t of tray intact. 6368'.5 end o.f 4th tray. 6368.5-6370: Bedding vertical, core intact, calcite recemented fractures, light gr~.y bands siltstone. 6370-6371: Core broken into many pieces; oil and calcite in fracture zone. 6371-6371.5: core intact, some bedding as above, dipping 63°. 6371.5 end of 5th tray. 6371.5-6375: Dipping 72°, dark brown siltstone with 2" band of lighter gray silt~tone, approaching a Very fine- grain sandstone. Most minute oil globules in pores through the core but hard, tight, ~ltghtly calcareous. Carbonaceous material in the bedding planes. 6371.5-6373.5: Core broken. 6380: A~ above, 70% siltstone, 20% sandy siltstone, 10% saudstone. Less oil in mud and unwashed cuttings. 66~90: As above. 00: As above. 6~10: Brown-gray argillaceous siltStone; 60% with increase in gray sandy siltstone. Abundant calcareous fragments and some slickensided siltstone fra~ents. Abundant mineral fluores- cence. No cut with CC14. 6420: As above, brown oil sb~in associated with granular calcite· fragments. Minor pinpoint fluorescence (yellow-orange, slow pale yellow cut) in tight, very fine grained silty sandstone. 6430: As above, with good trace of brittle coal; very ~light trace of oil in washed cuttings but none in mud. Some of siltstone is very coarse, almost a very fine-grain sandstone. 6.480: As above, with varying amount~. 6~90: Silt~tone, brown-gray (wet); 50% with varying amounts of light brown-gray, sandy siltstone (30%) and light gray very ~ine gr0ain saudstone, most of the sandstone appears barren of any fluorescence; however, some of the calcareou~ vein fragments are oil-stained to varying degrees. Antonio Zappa No. 1 Well Ditoh Samples 6~00: Siltstone, fine-grained, brown-gray (wet). Nost is thinly laminated and calcareous. ~0% siltstone as above, coarser to a sandy stltstone 30% an~ sandstone. Chiefly fine-grained feldspar fragments; tig2~t, dirty, minor quartz 30%. ~ost of this sand is seen as individual grains. Viscosity and weight of mud have bee~n raised appreciably between these last two samples. This increase in sand, individual grains, could be partly due to the heavier viscous mud. Continued coal chips, probably thin stringers as in cores, not cu$, will not dissolve; very brittle. No oil in mud or cuttings, washed or unwashed. 6510: Siltstone as above ~0%; sandy siltstone a.~ above 30%; ~and- stone 20%. 6~20: As above with 60% stltstone; 30% sand~iltstone or coarse silt- stone; 10% sandstone; increase in lime and pyrite, also fair- ~%z.ed "c?~tps'~ of charcoal or carbonized wood. 6~30: ~l£%s%one, as aoove ~ 6~hO: Siltstone, brown-gray (70%) and light brown-gray sandy sil%stone (20%) and gray to light gray tight sandstone chips. Minor amounts of carbonized wood chips and white calcite vein material. 6~0: As above, with abundant carbonaceous (coaly) matter (.probably coal seam). Minor .amounts of pyrite and calcite. Very little sandstone. 6~60: As above. 6~?0: As above. 6~80: Siltstone, brown-gray, as above, with minor very thin streaks of light gray, tight sandstone. 6~90: Siltstone, as above, (60%) with inc~ea~e~'~, of light brown-gray sandy silt- stone (20%) and light gray very fine-grained tight sandstone (20%). Very Small trace otl (fluorescence dull oranges very low cut). 6600: As above. 6610: As above with 30% sandstone; good trace of carbonaceous materials brittle and very slight sl~w cut. 6620: As above with 30% light gray very fine-grained quartzose sandstone; may have slight porosity but very fine and ~ight. Minor amounts of white calcite. Very small trace oil in mud and unwashed cuttings. 6630: Progressive in¢~e.ase~ of light gray white, very fine-grained sandstone dominantly arkosic; feldspar is soft and white and decomposes upon washing. May have sli~t porosity but probably little permeability. Very small trace oil in mud and unwashed cuttings. 6640: As above with less sand - 50% siltstone and 20% san(~y siltstone and 30% sandstone. 6650: As above with 60% siltstone; 30% sandy siltstone~ and 10% sandstone. 6660: As above with an increase of sand; very little if any porosity and per- meability; 40% siltstone; 30% sandy siltstone; 30% sandstone. No cut, very, very slight trace of oil. 6670: As above with 40% medium gray, firm sandy siltstone and 20% light gray very fine-grained to fine-grain-tight, feltspa~hic sandstone. 6680: Siltstone, as above ~.~50%) and sandy stltstone (40%) and 10% very fine grained, tight sandstone. 6690: Siltstone, sandy siltstone, and sand, as above. Antonio Zappa No. 1 Well'- Ditch Samples 67005 Siltstone as above - 60%; sandy siltstone as above - 30%~ .sand as above - 10%. No cut, very slight trace of oil in mud and unwashed cuttings - not enough to log. 67105 Siltstone, brown-gray - 40%; Brown gray to medium gray sandy siltstone - 40%; light gray, very fine-grain, tight sandstone - 20%, trace of oil in mud (pinpoints of fluorescence) trace of oil in unwashed cuttings. Slight trace of oil in washed cuttings; cut with col4 is slow and rather pale. 6715: Siltstone, and sandy siltstone as above, with 30% light gray very-fine-~rain sandstone. Some sandstone chips appear to be fairly clean and may have fair porosity; trace oil in mud and unwashed cuttings and trace in washed cuttings. Fluorescence fairly bright orange; only slight cut (fluor. pale blue-white). 6730: Siltstone, as above (40%); sandy siltstone (40%) and very fine-grain, tight sandstone (20%). Abundant crystalline calcite, good oil stain (fluorescence bright yellow-white) fairly good slow cut with CCL4. CORE #13 (6718-6737) Recovered § feet. Overall core is dark brown-gray to dark green-gray (when wet); firm, dense, argillaceous siltstone with thin light green-gray siltstone, sandy siltstone, and very fine-grain sandstone stringers. A single 5" stringer of fairly hard, tight fine-~'oarse sandstone was noted near the middle of the core; it is composed chiefly of feldspar and mafics and has little quartz. Most of the core is fractured to varying degrees, principally along bedding planes and along vertical fractures. These fractures are sltckensided and have been recemented with ~ray-white crystalline calcite, 1/16" to 3/16" thick. About 70% of tbs core has a pale yellow-orange pinpoint fluorescence, es- pecially the lighter colored bands. A fairly good oil stain is associated with the calcite veinlets and the ~ractured surfaces. (Fluorescence bright llow-orange and gave a good, fast yellow cut with CCL4). 718-6720) Dark brown-gray siltstone ~ith light ~gray bands of coarse silt- stone. Dtp~ 10-20°. Breaks regularly along bedding. probably indurated fault gouge. 6720-6721.5: Dark green-gray siltstone with thin wavy laminations of dark carbonaceous siltstone and light green-gray sandy siltstone. Dip 32°. ~ 6721.5: A 5" stringer of fairly hard clay cemented fine-coarse, domi- nantly feldspar sandstone graded bedding. May have slight permeability; dip 40°, 30% pinpoint fluorescence. 6722-6725.55 Dark brown-gray siltstone with a few very ti~n, light gray sandy siltstone bands; dip 420. Vertical fractures throughout, recemented with calcite. 6760: Siltstone, gray-brown- 50%; sandy siltstone, light gra~- 30%; very fine- grain, firm, tight Sandstone - 20%; abundant calcite, some with good oil stain. Fairly good, moderately fast cut; fluoresces a pale yellow-white. 6770: As aboTM. 6780: As above; sandstone - 20%; very fine-grain, tight to fine-grain with clay matrix, abundant oil stained calcite fragments. (Fluoresces bright yellow- white, slow cut, pale white); trace oil in mud and unwashed cuttings. 6790~ As above. 6800~ As above, with only small trace oil in mud and unwashed cuttings. 6810, As above. 6820~ Siltstone gray-br~n- 40%; sandy siltstone, light Bray- 30%; and fine- grain tight sandstorm, dominantly feldspar and rock fragments, clay matrix and cement; 20% pinpoint fluorescence, pale yellow-orange; trace of oil in mud. 31 Antonio Zappa No. 1 Well Ikltch Samples 6830: As above, with less very fine-grain sandstone, but with few fairly coarse feldspar grains, probably from thin streak sandstone, as in core. 6840: Siltstone - 60%; dark brown-gray~ light gray sandy siltstone - 30%; fine tight sandstone - 10%; 60% pinpoint fluorescence (a pale yell~¢- orange) in the light gray sandy stltstone; very slow faint cut. 686.Oz As above. 6870: Siltstone, gray-brown, as above and brown-gray sandy siltstone - 50%; 10% fine, tight sandstone; small trace of light gray quartzose, siltstone, probably very tight, but with bright yellow fluorescence; slow pale yellow-white cut with CCL4. 6880: As above, with very little sandstone. 6890: Siltstone, as above - 30%, with notable increase of brown, dirty, sandy siltstone - 60%, and fine-grain hard sandstone - 10%; abundant black car- bonaceous matter. 6900: As above ~ith 40% siltstone; %0% sandy siltstone. 6910: As above with 60% siltstoneS 30% sandy siltstone with considerable pyrite. 6920, As above with 40% siltstone; 50% sandy siltstone. 6930, As above with 30% siltstone and 60% sandy siltstone, and 10% sandstone; decrease in pyrite; ho oil on mud or cuttings; no P & P. 6940, As above. 69%0: Siltstone, gray-brown- 60%; not quite as sandy; 30% sandy slltstone, light gray and minors 10% very fine-grain sandstone. 6960: Siltstone; as shove - 40%; sandy siltstone - 30%; and 30% very fine-~,~rain to fine-grain tight sandstone, with small percent fairly clean quartzose sandstone; may have fair P & P. Mottled pinpoint fluorescence (yellow- orange). 6970: As above with minor very thin streaks fine-grain quartz~se sandstone. Abundant thin calcite veinlets. CORE #14 (6971-6979) Recovered 6 feet. Overall core is dark gray-brown, dense, argillaceous siltstone with thin bands of light gray, hard claystone, and medium gray to brown-gray very fine-grain, fairly hard, tight, sandstone. DL? is 32c- 36°. Core is fractured to w~rylng degrees and is not well .~ntact. The exact position of the core fragments ~as lost in emptying the core barrel. Parts of the core appear to be well fractured but these fractures have been filled and recemented with calcite, f~od oil staining is found on the more coarsely crystalline calcite veinlets and on fractures near these veinlets. The fluorescence is a bright yellow-orange with a good, fast, pale white cut with CCL4s the number of these veinlets in the siltstone is still relatively small. Most of the coarser siltstone and the fine sandstone interbedded with the siltstone has a finely speckled dull brown-oran2e fluorescence. It gives a very slow, faint cut indicating that though it has a fair oil saturation, it is very tight. The core also bled gas in small amounts for several hours after its recovery. 6971-74: Dark gray-brown siltstone with thin bands of medium gray sandy siltstone and very fine-grain dirty sandstone. Dip 32o. $ 6974.5, Thin stringer of very fine-grain tight, dirty sandstone; 80% pinpoint fluorescence; a dim brown-orange. 6974-6976.5: Siltstone, gray-brown with light gray bands; dip 35°~ minor calcite veinlets; good oil stain. 6976.~-6777: Highly fractured and elickenslded siltstone recemented with calcite. 32 Antonio Zappa No. 1 Well Ditch Samples 6980: Siltstone, gray-brown with minor amounts of very fine-grain hard sandstone. 6990, As in Core #14 with 50% siltstone and 40% sandy siltstone; 10% sandstone. 7000, As above, with slightly more sandy siltstone. 7010: As in Core #14 and samples above; slightly more calcite, but slightly less oil; 20% sandstone. 7020..As above with 10% sandstone and 50% siltstone. 7030: As above " " " " 7040~ As above. 7050: As above, with increase in limey sandstone and calcite. 7060: As above; 50% siltstones 40% sandy siltstone; 10% sandstones considerable calcite. 7070:As above, with less calcite. 7080: As above with considerable calcite and good show of oil in unwashed cuttings; fractured zone, no P & P,oil associated with calcite. 7090:As above without calcite and oil. 7100.'As above. 7110: As .above. Sand content of sand~ siltstone increased, in amount and size. Siltstone 30%; sandy stltstone 50%; sandstone 20%. No oil or calcite to speak of. 7120:Dark gray siltstone and sandy siltstone; 5-10% calcite; 10% sandstone; very little oil. 7130, As above. 7140, As above with much less calcite. 7150: As above, decreasing gas - pressure-volume readings. 7160: As above, dark brown-gray siltstone, limey, firm, some calcite; no oil. 7170: As above. 7180: As above. 7200~ As above; 'increase in sandstone, light gray to white; limey, cemented. 7220z One-third of siltstone is light brown (tan); could be cement. 10% sandstone as above. 7230: As above. 7240: Siltstone, dark brown-gray, argillaceous and dirty, .but with fair amounts of coarse silt and sandy silt. Fairly calcareous with abundant white calcareous fragments. Very little sandstone. 7250: Siltstone, as above, fairly hard and brittle; possibly slightly siliceous. 7260: Siltstone, 'as above, with 20% ~vhite calcite fragments, possibly fractured zone, increase in gas but no oil stain or live oil. 7270: As above, 10% calcite fragments. 727%5. As above, siltstone becoming slightly sandier. {bundant white calcite and clear quartz fragments. Quartz is probably of secondary origin as it has crystal faces anc'~, is very angular; shows no signs of rounding. Probably occurs in little veinlets recementing the fractured siltstone as does the calcite. 7290: Siltstone, dark brown-gray with minor very fine-stain, tight, but fairly clean sandstone. Abundant white calcite and coaly matter. 7300: As above, trace oil in mud and unwashed ~ttings probably oriF;.inating in fractures. 7310~ As ahoy. 7320~ Siltstone, as above, with increase in medium gray coarse siltstone and sandy siltstone; dull brown-orange fluorescence; very slow & very faint cut. 7330: As above, less calcite. 7340, As above. 7350, As above. 7360: As above. 7370, As above. 7380: As above. Antonio Za~a No. 1 Well Ditch Samples 7390, Dark gray-brown to medium brown-gray dirty sandy siltstone (60%) and light gray- brown and fine grain tight dirty sandstone (30%). The sandstone occurs as thin gray laminations in the dark brown sandy siltstone and appears very tight. Fairly good oil stain noted in the more coarsely crystalline calcite fragments; cut, slow, dim white. 7400: As above, less calcite, 7420, As above. 7430: ,As above. 7440: As .above. Increased gas reading, no sandstone, minor calcite, no oil$ could be fracture zone. 74%o, As 74h0. 7470:" above. 7480: Siltstone as above, less calcite. 7490: As ahove$ small trace live oil, probably from fractures. 7500: As above, no oil. 75601 Stltstone, as above, microscopically visible grains, becoming slightly coarser- almost sand size, embedded in the stltstone, (lO%)tfine-grain li~Jnt gray sand- stone, appears fairly hard (clay cement) and ti~t 20%~ orange, pinpoint fluor- escence; visible trace of oil in unwashed cuttings. 7570: Sandy siltstone, gray'brown, dirty, with minor thin light gra~ bands of coarse siltstone. 7580: Siltstone, dark brown-gray, not as much sandy silt; abundant calcite. 7590: As above, gray-brown siltstone, 30% is of the slightly coarser g~ain but still very fine. 76OO, As above. 7610," " 7620," " 7630:" " 76 0'." " 76%0," " CO__~_RI~. #1~, 76~-7662 Reoovered 7.5'. Dips 20°, becoming 17° in places. Over-all core is d~rk brown-gray, firm, tight, siltstone, with stringers of iu~m~n~$$xmt~mtmmm light gray silt- stone defining the bedding; 3 or 4 stringers of quartz sandstone, none over 3/4", coarse grain, angular, calcareous cemented, pyrite throughout, no oil visible, no cut with CC145 core intact, no prominent fractures or fracture zones. Minute flecks of pyrite throughout the core. Some~{as leakage (very little). 7670: Siltstone, as above, 10% fine-grain ti~t sandstone and 10% calcite. Bright yellow fluorescence on calcite cut, yellow white, fairly good. 7680: As above. 7690: Siltstone, brown-gray, fair amounts of sandy silt some~xat more calcareous than before. Abundant calcite, (only very small trace oil stain) and black coal~ matter. 7700: $iltstone and sandy siltstone, gray-brown. 77iO: As above. 7720: As above. 7730: As above, minor light-medium gray siltstone, minor calcareous-quartz sandstone, minor calcite. 7740: As above. 77%0, As above, less sandstone. 7760: Slltstone brown-gray, fairly sandy, but dirty and clayey as above. Abundant calcite. 3h ,': Antonio Zappa No. 1 Well Ditch Samples 777Ot Siltstone, as above with increase in fine-medium grain light gra~, poorly sorted feldspar sandstone. Small trace oil stain. 7780:1/3 is white calcite, very little oil associated with, highly fluorescent of course. Siltstone as above. 7790: Out Of the above (7?80-88) section of calcite, increased drilling rate and increased gas readings - probably a fracture zone; no sandstone, very little oil as compared to zones before this. 7800: Siltstone, dark gray (brownish tinge) and sandy siltstone, as above. Minute flecks of pyrite throughout all. this last few hundred feet. 7810: As above, varying calcite, not over 10%. 7 820: As above. 78%0: 1~' break with large increase in gas. Siltstone~ as above, with 10% crystalline calcite. Fair oil stain, fluoresces yellow-orange to dull yellow-white, dim white cut; not too porous. Small trace oil in mud, more in washed cuttings. 7840: As above, only small trace oil stain. 7850: Siltstone, as above, with abundant fairly large calcite fragments. Yellow white to blue-white fluorescence; cut fairly slow. Does not look too porous. 7860: As above. 7670, As above with some calcite and oil from 7868 fracture zone. very little sand- stone, good trace oil in cuttings and mud. 7880: Siltstone and sandy siltstone. 7890: SiltstOne as above. 7900 ~ As ab ore. 7910: Sil%stone, .gray-brown, dirty, but fairly sand~ 10% calcite with yellow-white fluore s ce~ce. ? ~i,' ~? ~i ~ 792Ot As above.. 7930~ Siltstone gray brown, much coarse silt and fine sandy silt in clay matrix, with minor (10%) very thin fine-medium Erain tight, hard, feldspar, sandstone streaks, minor calcite. 7940: As above, 10% fine-medium grain sandstone, angular feldspar grains embedded in a clay and siltstone matrix. D~I or,age pinpoint fluorescence; no cut, chips bleed one or two bubbles of gas. 7970: As above. 7980," " 8000;" " 8010, , , , seems to be harder. 8020=" " 8030, ,. " , and gray siltstone, tight, very firm, little sandstone or calcite. 8040:" " 8050," " 8060," " 8080:" " 8110:" " 8120, Siltstone, as above, with increase in fairly hard, slightly calcareous, brown-gray,· dirty sandy siltstone, minor calcite. CORE //-16 (83.2~-8l~O) Over-all core is a dark brown-gray, firm, massive, calcareous, fairly sandy, argillaceous siltstone. The sand grains are extremely fine, about 20% are barely visible with the naked eye, and are embedded in a clay and siltstone matrix. Estimated dip is 1OO to 20°. Core is well intact with but a few recemented fracture zones. Dominant angle of fracture is 75o. Calcite veinlets show only a small trace of oil stain (fluorescence green-white, cut very slow and dim white). 70% of core has a finely speckled, dull orange fluorescence. A faint very slow dim yellow-white cut is obtainable with CC14. The core Bled gas in fair amounts several hours after recovery. 3~ AntOnio Zappa No, I Well Ditch Sa.~les Core: #16 (Oontinued) 8125-27.5: Dark brown-gray, massive, argillaceous siltstone, fairly sandy and slightly calcareous. 8127.5: 1/4" streak light gray medium fine calcareous sandstone and 1/4" yeS,let calcite. Fairly bright yellow-orange fluorescence, but no cut. Dip 21°. 8127.5-8131.5: Gray-brown, dirty, fairly calcareous sandy siltstone with occ~-~..- sional thin calcite veinlets recementing high angle fracture planes. Dip of fractures 74°. 8131.5-8132.5: Highly fractured and pulverized siltstone (gouge). Open frac- tures have been recemented with calcite. Veinlets highly irregular and up to 1/4" thick. 8132.5-8134: Gray-brown, fairly calcareous aandy siltstone, moderately frac- tured, calcite in fractures. Dip of fracture planes 750. 8134-8137.5: Dark brown-gray, massive, calcareous, finely sandy siltstone. At 8135~ Thin band medium .gray fairly hard claystone. Bright yellow-orange fluorescence, but no cut. 8137.5-8138: Core badly broken. 8150: As above in core, exactly. 8160 t" " 8170:" " 8180s" " with slight increase in calcite. 8190:" " with trace of coal. 8200:" in above core. 8210: As .in core above (No. 16) 8220, As above. 8230, , ,, 8240~" 8250:" 8260:" 8270:" 8280:" 8290: , 8300:" 8310:" 8320:" 8340," 83%0:" 8360:" " with trace of coal. I! I! I! " fir~/ha~d dark gray siltstone and white speckled sander siltstone, 8370:" appears to be felspar and quartz, angular, in clay and silt matrix. Oc- casional light-medium gyay stringers in a few lighter colored cuttings; no sandstone, very little calcite; no oil. 8380: As above. 8410:" " 8420~ 70% of sample is white-speckled gray sandy siltstone, of overall lighter color, gray than above. 8460: as above. 8470," " 8480:" " 8490," " 8500:" " with some sandstone, some limestone with pyrite throughout, some calcite. 36 Antonio Zappa No. 1 W~_~ Ditch S~amples · 8510, AS above; 40% siltstone; 40% sandy siltstone; 10% light .gray sandstone, tight; 10% calcite; everything extremely limey; few chips coal; no CC14 cut. '8520, 30% siltstone~ 60% sandy s~ltstone; 10% calcite. 8530: AS above with 10% sandstone; trace of rounded milky quartz grains (sand size ) no oil stain. 8540~ As above with less sand. 8550, 20% siltstone; 70% sand~ siltstone; 10% tight sandstone; no oil. 8560: As above. 8570, As abowe. 8580~ As above with 10% calcite and a trace of coal. No cut. 859Oz As above' 8600: As above with less than 10% limestone, calcite and sandstone. Probably stringers of the two and fractures of recemented calcite. 861Oz As above. 8620: As above without limestone (very limey siltstone & san(~ siltstone). 8630~ As above. 8640:" '" 8660," 8670," 8680," 8690," 87OO~" 8710:" 8712:" " with slight increase in stltstone (to 30%). " ~l. th 40% siltstone. " with 50% siltstone and 30% .sandy siltstone; 10% sand; 10% calcite. " Core 17. CORE #17 (8712-8724) ... ;.~, _::,.L~;.. , .,,.': ~. ~:'..f,, ' ~ray_! (top dewn~ecovered 10.3 fee~. 0-0.9' Thinly l~uainated siltstone and sandy siltstone; bedding nearly hori- zontal; contacts poor and indistinct. Traces of serpentine, like slickensides, waxy to the touch (no calcite in these - younger - fractures and/or shears.) Near vertical calcite stringers fill older fractures. Last 0.05' is a tight dirty fine-grained sandstone; contact poor and somewhat graded. This entire section of core is ceres nted with lime. O.9'-2.'O': Fine-grained siltstone, dark; slickensided several directions near vertical and one (concoidal) at 6OO; some calcite stringers with random orientation. Limey; slickensides feel waxy and a couple show oil fluorescence and good 0014 cut. Fluorescence yellow-orange. 2.0'-2.8': As above without oil stain and slickensides with an increase in calcite. Tray 2 (2.8' to 5.5') Cverall, this section of the core is medium to dark brown to greenish gray with a few light .gray streaks, very little fracturing and calcite. Mainly siltstone with less than 10% tight, dirty sandstone and 20% sandy siltstone. Bedding is approximately 5° and fairly distinct, although not sharp or regular. Thin sandstone stringers at O.1', 0.55' and 0.6'. Thin mudstone or fine grained siltstone stringers at 0.5' and 1.2'. (5.5, to Overall core as above with bedding 5 to 10°. Sandstone (tight) at 2.0' (graded and fine) andat 2.25' (fine grained). to Overall core siltstone 70% and sandy siltstone 25% with 5% sandstone and calcite. Near vertical slickensided plane still evident in upper 1/3 of this section. 0.0'-0.9: (upper 1/3) as above. O.9'-1.85': broken, slightly splintery or hackley; light ~ray. 37 Antonio Zappa No. 1 Well Ditch Samples 1.85'i Small sandstone lens from O' to 0..05', thick (good cross section of fusilinid shOWing in sandstone). Sandstone is graded to very coarse (angular to sub-angular fragments) mainly clastic limestone with considerable pyrite. 1.85'-2.4': Dark siltstone with very little calcite, limey. 8720: As above. 8730," " 8740:" " 87%O~ As in Core above (No. 17) -. 8760:' As above with trace of gray sandstone with a cream ..yellow fluorescence and slight No visible oil or oil stain. ~ CC1. cut. 8770: As .4 above. 8780: As a'bove. 8790:" " 8790:" " 8800.." " 8810: Siltstone as above 30%, sandy siltstone as above 30%, and 40% an~lar quartz grains and sand-sized cuttings of quartzite or chert with considerable pyrite (white to blue to greenish). 8820, As above. 8860: Dominantly siltstone, as above. 8870: Increase (30%) in light gray fine/medium grain very poorly sorted, tuffaceous (?) sandstone. Not too hard but very tight, olay matrix and cement, yellow-green fluorescence in washed cuttings; very slow, dim yellow cut. 8875: (drill£n~ break). LigJ~t gray, fairly b~rd, brittle, fine grain with a fe~ disseminated medium Drain, tuffaceous sanclstone, appears t±F~ht with prominent clay matrix. Fairly good amounts o£ oil in mud and cuttings, slow, faint yellow cut; good trace slickenstdes and calcite. 8885: Sandstone, as above, appears tight, but might have slight porosity; clay matrix, sli~ht!y calcareous, fair amounts of oil, fairly bright yellow white Fluorescence. Cut slow and dim yellow. 8890: Sandstone, fine to medium grain, gray-~¢hite, dom±nar~tly an~ul~r feldspar grains in olay matrix; cleaner than above but less oil stain. 8895: As in Core No. 17 above, ~Lth 20% ~ands~one, a~ at 8890. 8900: As above. 8750: Siltstone, dark gray-black, minor sandstone 10%. 8955-60: Li[j:ht ~ray-white tuffaceous sandstone and some gray qua~tzsose, sandstone, that is fairly ~ell sorted but hard. Dull yellow-t¢hite to bright yello~¢-white fluorescence. Slow, dim ~hite cut. 8970: As above ~ith 40% siltstone and 30% sandy silt~tono. 8980.' As above. 8990:" " 9000: Siltstone, dark gray-black, hard to very brittle, probably somewhat more siliceous than before with minor thin streaks of hard, tight light gray-white sandstone. Trace slicl¢ensides, thin coating calcite on ~lick surface, trace oil stain on calcite and in fe~ of the sandstone chips; slow, dim cu~. 90101 As above. 9020: Siltstone as above, brittle (40%); sandy siltstone 40%. Both have a speckled fluorescence (calcite cement and calcite stringer; small amount of oil with calcite stringers). Sandstone, light gray to brown, fine to medium sized grains; quartz-feldspar. Few ferromagnesium minerals, tight but fairly clean, some chips sho~ slight slow carbon ret. cut; others none (most is limey). 9030: As above. 9040: As above with increase in sand to 40%. Thin sandstone stringers of nearly one foot (tight). Ditch gas increase 3 units (from 5 to 8), very slight trace oil. 9050: As above;section as a whole seems to be carryin~ more sand, probably very thin str~mgers as no evidence of sand on drill rate curve. Sand and/or sandy siltstone of a tuffaceous nature varies in samples from 5% to 20%. Antonio Zappa No. 1 Well Ditch Samples 9060: Not as much sandstone, 20%, as above, but more dark brown-gray sandy siltstone and some light gray hard, qus_rtzose siltstone; small trace oil, probably from fractures, fair amounts of calcite. 9070: As. above with 60% siltstone and 20% sandy siltstone. 9080: As above with only 40% siltstone and 30% sandy siltstone and 30% sandstone with calcite and a trace o f hard chert-like chips associated with p~ite. Trace of oil in/on calcite. 9090: As above, with an increase in siltstone to 60% and a decrease in sandstone to 10%. 9100: As above. 9110: Siltstone, as above, dark gray-bl~ck, in part siliceous and harder than steel, and medium gray siliceous shale (20%), hard, angular chips, very brittle, harder than knife blade; good trace calcite. 9120: As above. 9130: Siltstone and sandy siltstone as above with 50% and 40% respectively, with 10% di~.ty, tight fine sandstone. 9140: As above, trace live oil from calcite veinlets and fractures. 9150: Siltstone, dark gray-black, with varying amounts of sandy siltstone; hard/ brittle, containing numerous extremely thinealcite veinlets, fairly good oil stain on calcite, fluorescence dull yellow-green, dim white, fairly slow.cut. 9160: Siltstone, dark gray-black, hard/brittle (50%) with varying amounts of sandy silt and 10% light gray-white fine, tight, hard sandstone; 10% w~ry thin calcite veinlets. 9170: As above. ~ORE #18 (9171 to 9175) Recovered 6 inches. Core fragments: dark ~ay-black siltstone, hard, massive, locally fairly well fractured with numerous extremely thin calcite veinlets recementing fractured zones. One 1/8" light gray fine-grain, tight sandstone stringer; dip 12o; good trace oil in calcite and in fractures, also in the sandstone stringer~ fluorescence fairly bright yellow-white; slow pale white cut. 9180: As above in Core #18. 9190: Siltstone, as above with 30% light gray white to light gray, fine to very fine hard, tight sandstone and 10% calcite vein fragments; fair oil stain on sand- stone and calcite; dull yellow-greem fluorescence; slow, dim yellow cut. 9200: As above, 30% li~t gray, very hard fine and tight; trace sandstone chips. 9220: As above, with abundant calcite; fair oil stain; fluorescence fair, bright yellow-green; cut moderately fast, fair bright yellow. 9230: Siltstone, dark gray-black, hard, brittle, with only minor sandstone fragments. Very little live oil. 9240: As above. 9250: As above. 9260: Siltstone, dark gray-black, hard, brittle with 30%, hard chips; very fine- grain quartzose sandstone, trace oil, fluorescence as above; slow yellow cut, abundant finely disseminated pyrite in sandstone. 9270: As above, less sandstone. 9300: Siltstone, dark gray-black, hard, brittle angular chips, fairly siliceous. 9305: As above. 9310: As above but less siliceous with a slight increase in sand (slightly permeable) salinity increase to 350 g/g; Pm~ 0.73; speck]~v fluorescence; poor cut. 9315: As above with 30% sandstone and more salt water. Salinity 410 ~/g; Rmf 0.?1. 9320: As above. 9330: Dark gray-black, hard-brittle silicified siltstone and 30% hard m~gular chips very fine-grain quartzose sandstone; probable slight porosity, but appears tight and poorly sorted. 39 Antonio Zappa Nc. 1 Well Ditch Samples 9340: As above with only 10% sandstone and 60% hard siltstone. 9350, 3% sandstone. 9358: Drop in sandstone (10%) and increase to 60% siltstone. 9360-65: 10% siltstone as above with .40% sandy siltstone and 50% sandstone. (Sandy siltstone and sandstone were tuffaceous, light gray, cemented with calcite; fairly tight with very slight increase in salinity.) 9370: Dark siltstone and sandy stltstone ?0% and 20% respectively. Note.._~: Dumped old mud; now using mud from reserve tank; after one circulation salinity was 450 g/g (same as in mud dumped). 9380: Dark gray to black silicified siltstone; hard, brittle, ?0%, very fine pyrite throughout. 9390, As above with a 3-foot sand and sandy siltstone stringer @ 9382. 9400: As above. 9410:" " 9420," " 9430," '" 9440," " 9450:" " 9460," " 9470' " " 9480, " " 9490:" " with slight increase in pyrite. with thin stringer of sandstone. with stringers of light green-gray claystone. (949 -95oo) NO re(: overy. CORE #20 (2500-9504) ~{ecovered 2 feet. ..... "'~--O~e piece about 6 inches long and a tray full of broken pieces of core. Black, compact, without apparent 'bedding, non-calcareous siltstone with minor zones of sandy siltstone. Minute high-angle fractures tightly recemented with calcite, no general attitude. Oil sheen on the fractures and with the calcite. Very slight cut with CC14 obtained. Traces, on two pieces, of a band of gray volcanic ash, glossy, soft. No apparent P & P. 9510: As above, chisfly black siltstone and sandy siltstone with minor sandstone grains of the volcanic nature. 9520: As above. 9530, As in Core 20 above. 9540: " " " " " 95%0: As above. 9560:" " 95?0' Slightly coarser grained than above; siltstone 60%, sandy siltstone ~0%, sandstone 10%. 9580, As above ~ith a slight increase in calcite. 9590: As above but carrying more gas in mud; no gas peaks, jest a higher base %. ~ORE_ #a~ (959~-9605) Recovered ll feet. Overall, the core is black to medium gray, very hard, fractured, siltstone 70%, tine grained, slightly metamorphosed (recrystallized in part) with 25% sandy siltstone and ~ tight fine to medium grained sandstone of a tuffaceous nature. Calcite filled fractures throughout core; dip 70° to 90o, with a few dipping from OO to lO°. Euhedral crystals of m~alcite are abundant" in some of the calcite "filled" fractures. The bedding is somewhat irregular (tur- bidity current deposition) and slightly gradedl dips approximately lO°. Sli~t oil stain~on most fracture surfaces and in moat calcite vein~ show a light yellow to orange-yellow fluorescence. Some fractures (not filled) have "fresh" slickensides and'others show no evidence of any movement. The largest single piece of core is 0.6 of a foot long. Others vary in. alze from 0.4 of a foot and smaller~ predominant~v less than O.1 of a foot. Antonio Zappa No. 1 Well Ditch Samples #2~ (continued) (9594-9605) Recovered ll feet. Tray #l: 9594-9596.8. Tray #2:9596.8-9598.9 Tray ~3:9598.9-9602.3 Tray #4: ~602.3-9605.O Litholegy: 9594 to 9605: siltstone with: Thin fine grained sandstone @ 9594.4 Medium grained sandstone, tight, 9595-9595.1. Thin fine grain sandstone @ 9595.7. Calcite globules along bedding Plane, probably caused by pressure, @ 9597.1. Brown mud (could have been fault gouge) @ 9596. Tight graded sand and mangled area 9596.1 to 9596.3. Tight, medium grain sandstone @ 9596.6 Zone of horizontal and vertical calcite veins, broken and fractured (small fragments) 9598.9 to 9599.2. Broken zone, very little ~alcite, 9599.4 to 9599.8. Th.~m, light ~ray mudstone at 9602.3 Highly broken zone (probably partly due to core barrel) 9602.3 to 9605. 9610: As above. 9620:" ", lots of medium gray siltstone instead of black variety. ~C_ORE.#22~ (9630-765%) Recovered ll feet. Overall core is a dark gray-black to medium gray, very hard, siliceous, fractured silts'bone with occasional thin green-gray bands of b~mtonitic clay ~nd ~.~nor very thin streaks of light gray fine ~in, hard, tight, tuffaceous sandstone. The material classified as bentonitic clay is probably altered fine-grain vol- canic ash, inasmuch as these bentonitic bands almost always grade at their base into tuffaceous sandstone. The core is fairly well broken and is not well intact. The largest piece is not over 6" long and most of the fragments are considerably smaller. Calcite filled fractures occur t~moughout the core. They are very thin and dip predominantly from 65° to 80$ i.t~ough a few have dips that range from 5o to 30o. A finely crystalline mineral, probably one of the analcite group, occurs on the fractured surfaces with the calcite, principally i~ the high an~le fractures. The bedding is somewhat wavy and irregular and dips from 5° to ~0°. A small percentage of the fractures show good slickensides. A fairly good oil stain was noted on most of the calcite filled fractures and on fractured surfaces adjacent to these veins. The fluorescence was a fairly bright yellow-white (calcite fluorescence bluish-white) and a rapid, dull yellow cut was obtained with CC14. 9630.5: A thin green-gray bentonitic clay band that gra~s into light gray thin tuffaceous sandstone streak. 96~4: 3" band green-~ray bentonitic clay (probably altered from volcanic ash) that grades to a thin 1/4" light gray tuffaceous sandstone. Dip 5° 9639: Thin ].i~ht gray band fine grain, fairly hard and %ight tuffaceous sandstone~ dip 7°. -- 9640-41: Core badly broken in barrel; siltstone fragments less than 1" in diameter. 9655-57: as above. 41 Antonio Zappa No. 1 Well Ditch Samples C~OR~...~2~ (9657-9681) Recovered ~ feet. Siltstene and sandy siltstone, black, hard, siliceous, to slightly limey, with high angle fractures recemented with calcite, slight trace o f oil fluorescence on fracture surfaces.. Several thin bands of tuffaceous sandstone grading to the altered light green-gray softer clay, as has been noted in above cuttings and cores. Possibly there was a lot of this material in the core, and being easily destroyed, accounts for the very low recovery. Core is bro;en throughout; largest piece is 0.4 feet. Bedding, where faintly distinguishable, is horizontal to very low angle. The tuffaceous sandstone is mediUm to fine grain ~th angular/sub-angular grains, many crystalline appearing outlines of quartz and volcanic glass, very poorly sorted, with calcareous cementing, which effervesce with HC1. The sandstone grades into the light £~een-gray, very fine grain soft claystone. 9690: Increase in light gray-white very hard, siliceous, almost chert like claystone and 20% light gray hard., siliceous, fine grain tuffaceous sandstone; l~cally pyritic. 9700~ Siltstone 'and sandy siltstone with 20% fine-medium grain sandstone, broken quartz, possibly feldspar, calcareous cementing; f~ther increase in this sandstone, light gray to white, at 9705. Pyrite throughout. 9710: Increase in brown-gray sandy siltstone, fairly hard and very dirty, and 30% light gray highly tuffaceous .sandstone. 9720: 50% hard, partly calcareous cemented, partly silicified, brown and white "sandstone" with pyrite throughout. Very tough; ha~d drilling, possibly volcanic origin. Rest is black-dark gray' siltstone and sandy siltstone. 9725: 70% of sample is light gray-white, hard, dense volcanics. Contact appears to be at 9723 where drilling rate increased. Driller noted change in rate also. 9730: As above; white volcanics, considerable calcite in fractures and some cal- careous cementing. Continued decrease of siltstone. Minor sandstone. 9735: White to light gray-white tuff; small feldspar laths in an aphenitic glassy ground mass; very hard and highly silicified. CORE #24 (9729-9743) Recovered 8.5 feet Overall core is a ligJ~t gray-white to light green-gray massive, hard, siliceous, volcanic tuff, with minor green-gray, very hard and tight tuffaceous sandstone. The tuff is moderate to locally well fractured and brecciated, which probably accounts for the significant salinity increases below 9733. A small oil stain was noted on some of the fractured surfaces. The fluorescence was a dull yellow-white and a very slow dim white cut was obtained with CC14. Most fractures are open and there is very little recementtng with calcite. 9729-9729.5: Light gray, hard, siliceous tuff, fresh feldspar phenocrysts and altered greenish material in a light gray aphenitic matrix. Essentially not fractured. 9729.5-9732: Moderately well fractured tuff, as above, containing t~tn brec- ctated zones; abundant green chlorite is found in the brecciated zones, which are about 1' thick and relatively flat. 9732-33.4: Well fractured light gray, hard, unaltered tuff; principal angle of fractUring is horizontal, with good slickensides @ 9732.3. ~tnor high angle fractures. Dip 85°. Small oil and tar-like stain on fractures. (Dull yellow fluorescence and very slow dim white cut.) 42 Antonio Zappa No. I Well Ditch Samples CORE ~2~ (Oontinued) (9729-9743) Recovered 8.5 feet 9?33.4-9736.4: Breccia, highly fractured gray to green-gray tuff. Has clastic appearance due to brecciation by faulting. Local matrix has altered to chlorite. Little or no recementing of fractures with calcite. Angular 2" black siltstone fragment in breccia @ 9736.3. 9736.4-9737.5: Light green-gray, fairly hard, tight, coarse, tuffaceous gray- wacke sandstone, chiefly feldspar grains and rock fragments in a green-gray chloritic clay matrix. This section of core badly broken in core barrel. 9750: Tuff, as above, and hard, ti~t, tuffaceous sandstone, fine-coarse green clay matrix. 9760-.80: Light gray-white to light green-gray crystalline volcanic tuff; massive, little variation in sample over this interval. 9780-85: Weathered zone of volcanic tuff; angular and sub-angular feldspar crystals and subro~md Soft altered volcanic rock fragments in brown matrix. Thin, dirty silicified silty sandstone streak at 9782-83. Very hard. 9790: Light gray-white siliceous tuff. 9800: Light gray-white and medium gray-greenish volcanics. COHE #25 (9800-9817) Recovered 17 feet. Overall core is a light ~Tay, to light green~.~gray volcanic rock consisting of consolidated volcanic ejehta ranging in size from fine ash to agglomerate with individual fragments up to 1-.~ inches in length. The core is ~rd, well intact and only locally fractured. 9800-9802.5: Light grS.Y to light green-gray, hard volcanic tuff. Conspicuous glass shards up to 0.3 cm in length and minor quartz and feldspar phenocrysts in an aphenitic, ashy matrix. Prominent 85° fracture extending from 9800.5 to 9802.5. Partially calcite filled but has brown-black tar-like residue on surface of fracture. No fluorescence but gives a slow dim yellow-white cut,CC14. 9802.5-9812: Agglomerate, light green-gray, massive, well consolidated and hard. General appearance probably due to the alteration of the less stable minerals to chlorite and clay. Coarser material consists of volcanic eJecta, bomb~ lapi~lli, etc., ranging in size from 1/8" to 1½" in length. Fragments are angular to subround and generally irregular, but some are platey indicating that they .may have been compressed by overburden while still in a semi-molten state. Rock fragments of green chert and black siltstone occur in minor amounts in the agglomerate. @ 9808.5: Black angular siltstone fragment, 3 inches in length in finer agglomerate. 9812-9814.4: Green-gray massive tuffaceous graywacke; fine to coarse, slightly conglomeratic. Contains angular to subround grains of white feldspar, altered glass and rock fragments in a matrix of clay and chlorite. Minor finely disseminated pyrite. 9814.4-9814.9: Light green-gray consolidated volcanic ash. Contact from above separated by a 1/16" band of calcite. @ 9814.9~ 1/4" band white calcite; dip practically horizontal. 9814.9-9817: Medium light gray, extremely hard, chert-like, aphanitic, siliceous volcanic tuff, concoidal fracture. Some local banding, dip almost flat. Tuff fairly well fractured at 9815.6, with brown-black tar-like sub- stance on fractures, otherwise totally .unfractured and well intact. 9830: Li~t gray to cream volcanic tuff (100%). Antonio Zappa No.~l Well Ditch Samples 984~: Light, green-gray crystalline tuff, white feldspar and clear quartz crystals in a green-gray aphanitic ground mass. 98~0 As above. 9a ,o . ,, 9870: Light cream-white crystalling tuff. Way have very slight porosity but no permeability. Trace dull yellow fluorescence, with slow dim yellow-white cut. 9880: Light green-gray (wet) to gray-white (when dry) aphanitic tuff. Very hard and brittle. Small trace dark brown-black oil stain on few fractured surfaces. Fluoresces dull yellow-green. Cut fairly bright, but very slow, yellow. 9890: Green-gray finely crystalling tuff. Still very hard. 9900: Green-gray (light ~ay-~een when wet) tuffaceous siltstone; hard, brittle and siliceous. Possibly very finely crystalline tuff. Contains very finely disseminated pyrite. Abundant white calcite veinlets. Trace yellow fluorescence in washed cuttings; slow yellow cut. 990~: Lig_ht green-gray (when wet) fine grain, tight, hard, tuffaceous graywacke sandstone. Fairly calcareous. 9910: As above. 9920: Very hard, brittle tuff. 9930: Light gray to green-gray tuff. Dark green to clear glass shards in an ashy matrix. 9940: As above. 99~0: Gray c~ystalling tuff. 9960: As above. 9970: Light to medium gray~ siltstone, tuffaceous in nature but most probably water deposited. 9980: Highly fractured volcanic tuff, medium gray stltstone and minor sandstone, hard, fine and tight. 9990: Increase in light gray very fine grain tight sandstone; contains abundant finely disseminated pyrite, much white calcite filling small fractures. lO,O00: Green-gray tuffaceous siltstone and tuff. 10,00~: Light gray to light tan-gray hard, brittle, tuffaceous sandstone, medium to fine grained, tight, dirty, fairly calcareous. lO,010: Gray to brown-gray, dirty, tuffaceous sandstone as above, and lig~t brown-gray tuffaceous siltstone. Small, dim yellow fluor- esence in sand~tone i~n washed cuttings (slow yellow cut) but no live oil.. 10,020: Light gray-white to tan-white tuff. Hard, brittle, crystalline. Dull yellow fluorescence in washed cuttings with very slow dull, yellow cut. ~0RE,.,,~,~26~ ('10,029-10,048) Recovered 17 feet Tray #1:3.0 feet- 10,029 to 10,03.2' Tray #2:2.7 feet- 10,032 to 10,034.~'. Tray #~: 3.1~ feet - to 10,0~7!8'. Tray ~! : 2 ~ feet - to lO,O 0 5'. Tr~y ~65: 2~ feet - to 10,~ 1'. Tray : 2.9 feet- to 10, 0'. Overall, the core is composed of light gray to light green-gray tuffaceous sediments. The majority of the core is very hard and some areas appear to be silicified. These tuffaceous sediments were probably deposited in shallow water or on a steep slope Antonio' Zappa No. 1 Well Ditch Samples COHE #26 (Continued) (10'029-10,048) Recovered 17 Feet ~-~ ............ ~(under water), as bedding is haphazard, with lenslng and ap- parent folding, believed to be primary features (before hardening of the rock). Calcite filled fractures, throughout core; dip 50o to 90o. Some have a plane surface and probably cover a relatively large area, while a few are jagged and broken looking and appear to cover a rather small area. ~ost of the fractures show an oil stain and a bright yellow fluorescence. In a couple of places it is apparent, pressures during faulting, folding and fractur- ing ha. ye distorted the beds of this core. The overall composition of the core is tuffaceous sandstone (60%), tuffaceous sandy siltstone (20%) and siltstone (probably tuffaceous- 20%). Tray #1:(0 to 1.5') 10,029 to 10,030.5. Siltstone and sandy siltstone with inclusions of fine grained siltstone up to an inch in diameter. Turbidity type deposition (haphazard bedding) with bedding to 40°. Random fracturing with all fractures filled with calcite. 1.5 to 2.5 (10,030.5 to 10,031.5): Sandstone, tuffaceous, tight, hard and slightly fractures. The contact with the above siltstone is sharp and distinct and dips 5°. 2.~ to 3.0 (10,031.5 to 10,032): Darker siltstone and sandy siltstone, very hard, silicified. The upper end has a sugary recrystallized appearance. Fractured. Tray #2:(0 to 1.3) 10,032.0 to 10,033.3. As above but more mangled. Trays 2, 3, & 4, to 1.7 in Tray 4. 10,033.3 to 10,039.5. Tuffaceous sandstone, coarse to medium grained, angular, tight, hard, fractured and locally mangled. 10,039.5 to 10,043.6: Silicifted siltstone, hard, fr~ctured, some sandy siltstone. 10,043.6 to 10,046.0: Sandstone, tuffaceous, tight, Eedium fine to coarse grained, locally silicified. 10,050: Sandstone, li~'~t gray-green, fine-coarse, locally silicified, tight, tuffaceous, some siltstone. 10,060: Sandstone, as above but decreasing in amount. (80% down to 50% in~ this sample) and siltstone, light gray through brown, hard, firm/brittle. 10,070: Sandstone, as shove, slightly less sand. 10,080: As above, slightly more silty. 10,090: Silts$one, light green-gray, herd, silicified 70% (probably tuffaceous) sandy siltstone 20%, and sandstone 10% (both tuffaceous. ) 10,100: Sandstone, li~h.t grayf~ tuffaceous, hard/brittle; dominantly very fine grained,~ 60% and sandy siltstone 20%, mad siltstone 20%. 10,110: As above, very hard, 50-50 sandstone and siltstone. 10,120: As above, no change. 10,1~: As above. 10,1 " " Antonio Zappa No. 1 Well Ditch Samples .10,150: Increase from 20% to 50% in tuffaceous sandstone, hard, brittle dominantly light ~ay but some darker and occasional light blue-green, fragments. No fluorescence. Decrease in siltstone. lO,160: 60% sandstone, very fine to fine, white-blue green, some tan, very hard and brittle, tuffaceous, ~nd 40% st ltstone, hard, brown, san dy. 10,170: As above with less Sandstone and a progressively increasing amount of darker chips similar to those above "volcanics" Many are highly mineralized (very fine grained pyrite thr~ugh- out); still somewhat silicified. 10,180: As above, more dark material as above. 10,190: 40% very fine, very hard sandstone, dominantly light gray- green to dark gray and siltstone, dominantly chocolate brown, slightly less amount of dark chips than samples 170 & 180 above. 10,200: As above, slight increase in hard tuffaceous sandstone, silt- stone dominantly dark gray, rather than brown. 10,210: Increase in siltstone (now approximately 60%), hard/brittle, dark gray and 40% hard tuffaceous sandstone and sandy ail tstone. Occasional fragments of milky quartz. 10,220: Increase in light green-~g~,~ay tuffaceous sandstone. Sample is 50% light material ~'and 5©% dark. 10,230: As above. 10,235 & 10,240: Hig~ly silicified light brown-gray study siltstone. 10,250: Hard, brittle, silicified siltstone as above, and li~{ht gray, brown-gray fine grained, hard, brittle, tigjut, tuffaceous sandstone, well silicified, locally well mineralized, abundant disseminated pyrite. 10,260: Siltstone and sandstone, as above, with minor light gray, fine more quartzose saudstone; tight, but better sorted than above. Small trace live oil, bright yellow fluorescence. 0il is primarily associated with a few white calcite fragments. 10,270: As above with an increase in siltstone ~nd a decrease in oil. ($iltstone - 50%; sandstone - 20%). CORE #27 (10,275 - 10,276) Recovered 1 foot. One foot of broken fragment of soft ~iltstone, green-gray sand- stone, dirty sandy siltstone, and other miscellaneous fragments. Apparently all cavings. 10,280: Hard, brittle brown-gray sandy silt~tone and argillaceous siltstone, fairly calcareous. 10,290: 40% hard, siliceous green-gray to light gray fine grain tuffaceous sandstone and chocolate brown hard, brittle saudy stltstone. Very slight mottled oil stain. 10,300: Light gray white cherty 's il ts tone . Siltatone is recrystallized and replaced to a fairly high degree by light gray chert. Fairly abundant calcite in the form of very small veinlets. ~mall trace oil associated with the calcite and on fracture surfaces. Increased drilling rate is probably the result of fractures. lO,310: Light gray chert, very hard and brittle. Probably recrystallized sandy siltstone. Rock breaks into platy fragments mud the flat surfaces have a soft sheen to them giving the rock a phyllittc appearance. Recry~talltzation of the rock might be the result of hig~ temperatures and pressures along a f~.ult zone. 46 Antonio Zappa No. 1 Well Ditch Samples 10,320: Cherty siltstone, as above. 10,325: Black, hard, brittle, sandy siltstone 80%, a~d 20% light gray hard, tight sandstone. Cuttings are predominantly dark and almost a complete lack of the above chert. 10,330: Sample resembles that of lO,310 and 10,320 with 30% ailtstone; 20% sandy miltstone; 30% sandstone; and 20% cherty m~terial as above (all is at least slightly silicified). 10,335: Darker once again; most of sample is somewhat limey; 70% siltstone; 20% sandy siltstone and 10% sandstone. 10,340: As above with an increase in sandstone, 30%; 30% sandy ~ilt- stone; 40% siltstone; all tight and limey. 10,350: Siltstone, ltmey, 40%, as above, with 10-20% light gray quartzose sandstone, well silicified and containing abundant finely disseminated pyrite; 10% gray green-gray fine tuffaceous sandstone and 30% medium gray siliceous sandy ~ilt~tone. 10,360: As above. 10,365: Siltstone, dark brown-gray, fairly sandy, extremely hard, well silicified (harder t~'~an steel for the most part) also fairly li~ey. 10,370: Gray, hard well silicified sandy siltstone and very fine sand- stone, 30% dark siltstone as above; minor cherty shale ~nd calcite vein m~terial. 10,380: Light gray, hard cherty shale and light gray white quartzose sandy siltstone and very fine tight ~sndstone. Sandy siltstone and ssndstone are highly calcareous. 10,390: ~edi~nn grey to brown-gray siltstone, moderately sandy, and only partly silicified. 20~ hard, tight, very fine, dirty sandstone; good trace sliCkensided siltstone fragments, some calcite but overall sample is not a~ calcareous as above. Siltstone is probably fractured. 10,400: As above. 0'0R,E. ~,t~28 (10,~00- lO,~0) Recovered 4.5 feet. Overall core is a dark gray, to green-gray, hard, siliceous, argillaceous to slightly sandy, .fractured siltstone. Silt~tone is highly fractured ~nd hence was badly broken in core barrel. This also accounts for the low recovery. Only a few fragments over 5" long were intact. Fracturing has been moderate to intense and most of the fractures have been fi'!led sad re- cemented with white vein calcite, leaving only a small per- centage of open fractures. Slickensides are abundant through- out core and are found particularly along vertical fracture planes. Bedding is not well defined but generally appears to be almost flat; dip of 1/8" green-gray claystone band at 10,403' is 8o. A very small trace of hydrocarbon fluorescence was found in association with the fracture filling calcite and on some of the fractured surfaces. Fluorescence was a dull yellow-green and a slow, dim, yellow-white cut was obtained with CCi~. 10,440: Sandy si tstone, medium dark gray to brown-gray, hard, siliceous and brittle, fairly 'calcareoum. 10,~450: As above. 10,460: 50% siltstone; 20% sandy siltstone, and 30% sandstone. All of sample is about 50% a~ above and 50% tuffaceous light gray to light ~een-gray. Antonio Zappa No. 1 Well Ditch Samples 10,490: Silt~tone, medium gray to brown-gray, hard, siliceous, fairly sandy. 10,500: Sandy siltstone, medium Mray, hard, brittle, siliceous; sample very uniform with very little vein calcite. COHE #29 (10~506 - 10,%14) Recovered 8 feet. 10'506-10,%07.9: Dark highly fractured siltstone, bedding 0° to 10°; calcite filled £r~ctures 90o to 70°; turbidity current deposition; tight; later, unfilled fractures in all directions. 10,507.9-10,508.5: ~Iedium gray to faint green-gray mottled sandstone, fine-grained, tight. 10,508.5-10'508.9: Medium g~ray very dirty limestone or a very limey siltstone. 10,508.9-10,512.1: Medium gray to fain~t green-gray siltstone, sandy siltstone with a few very thin bands of fine ~andstone, all tight. Highly fractured, one good vertical fracture, calcite filled, later movement, oil stain in fault gouge filling. 10,512.1-10,513.4: Core fragments with fault gouge up to 3/8" thick, oil stained, was calcite filled at one time. 10,513.4-10,514: Fractured fine sandy siltstone; good examples of turbidity current deposition. CORE #30 (10,514 - 10,532) Hecovered 3.5 feet. ~Top 0.1 feet is limey sandstone, medium gray, medium grain size, tight. O.1 to 0.5 is ~andstone as above, but only sli~htly limey. 0.5 to 3.5 is medium dark gray siltstone; hard, slightly calcareous, fractured, some fractures are calcite filled, one prominent near vertical fracture; very slight oil fluorescence in most fractures. Although no trace of coarse tuffaceous sedi~ents was found in the core barrel, the chips coming over the shaker indicate that part of the missing core was composed of coarse "volcanic" sediments, light, tigj~t, and core,posed largely of feldspar. It has the appearance of a water deposited crystalline tuff. 10,540: '30% siltstone; 40% sandy ~iltstone; 30% :~andstone; most of ~ample is relatively light and tuffaceous in nature. 10545: percentages as above, but considerably more tuffaceous material. 10,550: Dark siltstone full of microscopic pyrite. 10,560: Tuffaceous sediments;40% tight sandstone; 40% sandy siltstone; 20% siltstone (all tuffaceous). 10,570: Dark gray to broWn-gray hard, brittle siltstone 60% and li~ht gray to green-gray hard, tuf£aceous sandstone and ~andy siltstone 10,~80: Light .gray-white, tuffaceous sandy ~iltstone, very highly silicified, extremely hard and bri~tle. 10,590: Light green-gray hard, miliceous, tuffaceous siltstone and sandy siltstone. 10,600: Light green-gray fine, hard tuffaceous sandstone and siltstone and black, hard, siliceous silt~tone. 48 Antonio Zappa No. 1 Well Ditch Samples 10,635: Light gray-white fine, tight, tuffaceous sandstone and sandy siltstone. Mottled brown oil stain in minute fracture planes; fluorescence a dull yellow-green; slow pale yellow-white cut. 10,650: Light green-white to green-gray, fine-medium tight, hard, highly tuffaceous sandstone. Locally pyritic. 10,6601 as above. 10,680 " " 10,690: Siltstone, dark gray, very hard to siliceous with minor light gray, hard, tight, tuffaceou~ sandstone. 10,700: Siltstone, medium liMht gray, very hard and silicified, dull mottled yellow-~een fluorescence, but no cut. 10,720: As above. 10,730: Light green, fine, tuffaceous sandstone. 10,735: Light gray, very hard and brittle, cherty claystone ~nd si~tst~ne with 30% light green to gray fine, tight, hard tuffaceous s a~ ds tone. 10,740: Light green-gray, hard, siliceous saudy siltstone mud dark gray hard siltstone; minor tuffaceous sandstone. 10,760: Claystone, 20%, as above; light bluish-gray (wet), light tan (dry); very hard, brittle, possibly siliceous; siltstone 40% as above, dark blackish (wet) dark redish (dry), very hard, abundant calcite filled fractures. Sandy siltstone 20%, probably local sandy phase above ~ il ts tone , dark gray-black (wet), gray (dry), silty to predominantly very fine grained, angular, moderately hard, predominantly siliceous tO occeolonal ~ calcite cement. Sandstone 20%, locally fine to medium ~rained phase above sandy siltstone, also s~ndsbone, as above, pale greenish (wet) green-gray (dry), fine to occasional medium grained sub-angular, moderately well sorted, ha~d with siliceous to occasional bentonitic cement. Trace pyrite, metalic green; calcite, white, crystalline. 10,770: Claystone 10%, silt.~tone 70%, sandy siltstone 20%, sandstone trace, all as above, except color shift to predominantly (90%) light greenish (wet) greenish-gray (d~y), abundant calcite in fractures. 10,774-5: New bit #66~ Globe Junk Basket, cut l', recovered 1' sandy siltstone to very fine sandstone, 75%, crushed au d fractured, dark greenish (wet) grayish green (dry), silty to occasional very fine grained, angular moderately well sorted, very hard, v.r. light oil stain and occasional yellow fluorescence on abundant small (to 1/~" maximum) calcite filled fractures. Siltstone 2~%, massive, black, moderately hard. Note: Core recovery, rounded fra~.~ents a~d rubble, top and bottom in- distinguishable, a~parent faulting near cored interval. 11,018-25: As above (siltstone, occasional ~eenish grading to brown and occasional blue, hard, sandy siltstone, occasional greenish to ~x, edominantly brownish, moderately hard to V.R. soft sandstone, greenish to predominantly brownish and grayish, predominantly fine grained to occasional coarse grained, angular, occasional bentonitic cement). Exc~qot, 20% chert or volcanics?, brownish, translucent, very hard, brittle,conchoidal fracture, non-calcareous. 49 Antonio Zappa No. 1 a~l Ditch Samples 11,100: Siltstone, dark brown to brown-gray, hard, siliceous, bri~tle and medium light gray hard, tight, siliceous, fine sandstone slight brown oil stain, fluorescence dull yellow-green, very slow and dim cut. ll,180: Siltstone, dark gray, brittle, fairly hard and siliceous, grading to medium gray, hard, siliceous, sandy siltstone. Trace brown oil stain on and ~round s~nall calcite veins. ll,190: As above. ll,200: ~ilt~tone, aa above ~nd light gray to medium gray siltstone and sandy siltstone, fairly well silicified, locally fractured, with minor vein calcite. ll,210: Light gray' to medium gray very fine to medium fine tuffaceous ~andstone. Hard ~nd very tight with clay matrix, moderately silicified. A few fragments of medium grained sandstone have a .faint brown oil stain on them. 11,220: ~andstone, as above. 11,230: Siltstone, medium gray to light g~ay, very hard, brittle end well silicified. For~l 9-381a (Feb. 1951) (SUBMIT IN TRIPLICATE) UNITED STATES DEPARTMENT OF THE ]FITERIOR GEOLOGICAL SURVEY Budge~ Bureau No. 4~-Ra~8.4. Approval expires 12-,31-00. ~_. Anchorage umce ........................... ~...,o. 010531 Iniskin SUNDRY NOTICES AND REPORTS ON WELLS NOTICE OF INTENTION TO DRILL ................................. I ...... SUBSEQUENT REPORT OF WATER SHUT-OFF ............................ NOTICE OF INTENTION TO CHANGE PLANS ....................... I ...... SUBSEQUENT REPORT OF SHOOTING OR ACIDIZING ................ I ..... NOTICE OF INTENTION TO TEST WATER SHUT-OFF .............. I ...... SUBSEQUENT REPORT OF ALTERING CASING ....................... I ..... NOTICE OF INTENTION TO RE-DRILL OR REPAIR WELL ......... I ...... SUBSEQUENT REPORT OF RE-DRILLING OR REPAIR ................ I ..... NOTICE OF INTENTION TO SHOOT OR ACIDIZE .................. / ...... SUBSEQUENT REPORT OF ABANDONMENT .......................... I ..... NOTICE OF INTENTION TO~ cAslNc~___$_e_~ .... I_~-__ SUPPLEMENTARY WELL HISTORY ................................... / ...... NOTICE OF INTENTION TO ABANDON WELL ...................... I: ................................................................................... / (INDICATE ABOVE BY CHECK MARK NATURE OF REPORT, NOTICE, OR OTHER DATA) "Antonio appraximately ~i ............ mX{~']ine of ~ ........... Well No. _Z.__app__a._"___~__ is located ___2_7__9_ .... ft. from:_ ne and 290 ft. fro NE 1/4 Sec. I8 · ~S 23W Seward (~ Sec. and See. No.) (Twp.) (Range) (Meridian) Iniskin Alaska (Field) (Oounty or Subdivision) (State or Territory) l v tion of ae i& ,oor &ove l wl it. DETAILS OF WORK (State names of and expected depths to objective sends; show sizes, weiwhts,;and lenwths of proposed casinwsl Indicate muddinw jobs, cement- ing ~9~tl~, and all, other Important propoled work) Present condition of ~e11= 9-~/8 casmng cemented at 7015t. Total depth 11,231'. Fish: bit and 9 drill collars, top at 10s934, Pr~osed work. It is proposed tog (1) Put in lO0-foot Cement plug through drill pipe ~u~:a~ 9720(~- at top of high pressure salt water zone. (2) Put in cemen~ plug~lSO' through drill pipe hung at 8620'. (3) Clean off second plug to approximately 8~20'. (4) Run 7", 32~ N-80 liner from ap- proximately 8520' to 6985', hanging liner on Burns liner hanger at 698%'/, and cementing liner solid from shoe to lap with 700 sacks of cement. (5) Oun..perforate .a~d, fra*cture'* selected intervals and test for production. OEC 10 1959 New York City 5s N. Y. Oil & Gas ~qcclhm I understand that this plan pi work muet receive approval tn writing by the Geological Su=,ey ~mpany .~_~_~_~_~ Unit Operator, Inc* ,.~ Ad&~s Tide ~. ~. ~ow~.~.~ ~,,~ o,~,c~: ,~, o '"""Los Angeles 13, Calif. UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY Budget Bureml No, 42-R356.3. Approval expires 12-31-§2. Anchorage L~.. OmcE ---n~-n~'4't- ................... L£^s~ NU~i~h. ......................... UNIT ........................................... LESSEE'S MONTHLY REPORT OF OPERATIONS State Alaska Co~ty t~ield Iniskin TY~e /'ollozoir~ is a correct report o/' operations arid prod~ctior~ (~cl~d~ drilH~ a~d prod~c~ _ .. . November 1~ wells) for ~e mo~ el .......................................... , ...... , Alaska ConsoXSdabed O~ Co, .................. ~~-'O~7~~-~--~'fi~-; ....... ~,'~ ~aa~, ................................................................... Co~p~u.:~-~r.2~,~W:.: ...................................... ............ -~$H~-'~2[~g~ ................................................. ~. ., ~.~.LEng~ne~ Phone ................................................................................... ~ ~ ***te ......................................................... ' OALLONS OF ~ARRELS 0~' WELL DA~S SEC. AND TWP. ~RANGE J3ARRELS O~' OIL(~]~AVITY: (~1/. FT. OF ~AS ~ or ~ No. P~.~c~. (In thousands) OASOLINE WATER (If ~ECOVERED none, so sta~o) ,,, E 1/~ of E ~/~ 18 ~S 23W 1 Nove~ber:: R~ ~ash ~,ipe to watch over f Lsh at 1( UnabLe to get over ~'ish. We L1 stand: Ed mndit;io~d to ~,0~800 fe~t. Djvisi~ REMARKS (If drilling, depth: if ~nut down, eau~o; d~to and result o! test for ganolLae content Ol gas) b~3h feet. :ng~ maintaining ECEIVED OEO ~0 ,,, Oil & ,n o[ k'li,~c:~ ~mt Minerai~ NoT~..--There were ..................................... 2 runs or sales of oil; ............................................... M. cu. ft. of gas sold; ............................................ runs or sales of gasoline during the month. (Write "no" where applicable.) NOT~.--l{epor~ on this form is required for each calendar month, regardless of the status of operations, and mus~ be flied ia duplicate with the supervisor by the 6th of the succeeding month, unless otherwise directed by the supervisor. Form 9-329 (January 19150) 16--25766-5 U. 8. GOVERNMENT rRINTIn~; OrrlCl~ Iniskin Bay, Alaska. (?.o. Bo× 7oo5, Anchorage, Alaska.) November IF, 1959. ~k~. Richard ~urphy, Petroleum Engineer, State of Alaska, 329 2nd Avenue, Anchorage, Alaska. D~ar Sir: Re Operations of Iniskin Unit Operator, Inc. October, 1959'.'" Antonio Zappa NO o I Well: Drilled 8-3/$" hole from ll,ll0' to ll,~31'. On October 12th stuck the drill string at 11,217'. Balance of month has been spent fishing. Present status: circulati.ng at 10,800', waiting on wash-over pipe. Top of fish: 10,934'. Beal No. i Well: i~oved fracturing equipment to location, installed draw- works, started installation of balance of equipment for cir- culation and other operations. Started pulling tubing. Status, November 1st: pulling tubing and~ changing collars, continuing to rig up for hydraulic fracturing operations. Yours truly, IN!SKIN L~N!T OPERATOR, INC. W ......... ~"Robln Willis ,~tn'e'e~ ' ' RECEIVED NOV 7 Oil & Cas Division c:F ]'~!;~,~:;:~ a~d A'line~:als Alaska Dept. o~' i"~amral He~urce~ Alaska Consol£dated Oil Co. Iniskin Unit - A. Zappa No. 1 Permit No. 12 Issued 10-26-59 Loc: 2370' FNL & 290' FEL,. Sec 18, T5S,R23W, SB&M Ele: 330' grd Contr: company rig Spud: "12-25-58 Cmpltd: Susp 12-18-59 TI) 11231' Csg: 13-3/8" @ 344' w/260 sx 9-5/8" @ 7015' w/546 sx around shoe & 100 sx thru collar @ 1663' 7" liner @ 8526' (top @ 6982') w/690 sx Budget Bureau No. 42-11356.3. i Approval expires 12-31-52. - ",~'~ UNITED STATES '~' L~,o omc£ ' DEPARTMENT OF THE INTERIOR t.~sz ,uM.E, '-0.,.~0~31. ................ GEOLOGICAL SURVEY u.rr .......................................... LESSEE'S MONTHLY' REPORT OF OPERATIONS ' State ...Al_o.._~ka ................ County Fiez6 _'_X.n_~.e.K~_~_ ........................................... The followin~ is a correct report of operations a~d prodz~ction (incl~dinE drillinE and prod'~cinE wells), for the n~on~ o1' ..... ~Z.B:~.~.lllb.~]2. ............... ,19~.~., .............................................................................. _O.~...~s~i._A~_,_+..~e~..~rk..~_~..E,...Y- ..................... · - ........................................... ................ ~EO. AND BARRELS OF Ou~ G~Ayrr¥ . (In thousands) GASOLINE WATER (If (If drlllinz, depth; if shut down, ~ oF ~ Twr. R~G~ WE~ DAYS CU. ~T. OF ~AS GALLONS OF ~ARRE~ OF RE~ARKS NO. ~o~uc~ ~ a~ ~sult of ~ot for ~ECOVERED noD6~ ~ S~te) con~nt of gas) ~E 1~. . o~ ~81~' 5S 23~ 1 September: D~,illed 8-3/8" hole, ].0,535' to 11,108'. ~r doa~ 1~. ~u~ptt7~ ~e to tt~e e~cee~Lingly sl~>w p~'ogress b~lng mate at t~e Alaska C,)nso. ltd~ted Oil Company ~ntor~ionZappa: No. 1 ~ell, w~ are ~r,~po~tin~ to the United S~ates Geologi :al Sur~ey on ~ monthly b~sis'. ~le t~ust this will be satisfac;ory fo:? you a. Lso. , .~. · ~ ~ours verr truly, C lil ~ ( ',as Se(:tion [ Lvision o[ M[n~ ar,d" Mine:~s ~ ~ D~pt- ol Nam :~ R~ NoTE.~There were ...................................... runs or sales of oil; ................................................ M. cu. ft. of gas sold; '. ........................................... runs or sales of gasoline during the month. (Write "no" where applicable.) No~.--Report on this form is required for each calendar month, regardless of the status of operations, and must be filed in duplicate with. the supervisor by the 6th of the succeeding month, unless o~herwise directed by the supervisor. For]n 9-8~9 (January 1950) 16--25766-5 U. S, eOVER#MENT P. INTINe orlqcz APPLICATION FO~'T.~IT TO-DRILL, DEEPEN OR-PLUG BACK Address - ' · ~ ~ · ~ ~ City State ~'"/':~ -" D]ESCRiPTION OF WELL AND LEASE I ~Vell number - Elevation (ground) Well location (give footage from section lines) Section--township--range or block & ~urvey Field & reservoir~. (If .w, ildcat~ so state); : ._- ~ Distance, in miles, and-direction fro,~t townbr po~t office Nearest dist~neo from proposed location go property or lease Hno: ~otlnty Distance from proposed location to nearest drilling, completed or applied~for well on the same lease: feet Proposed depth: _l!bO00' Number of acres If lease; purchased with one or more wells drilled, from whom purchased: Rot~ary or cable tools Approx. date,work will stare Number of wells on lease, including this well, completed in or drilling to this re~ervotr: Name Address Status of bond Remarks: (If this is an application to deepen or plug-back, briefly describe work to be done, giving present producing zone and expected new producing zone) CERTIFICATE: I, the undersigned, state that I, am tho ~ Of the ~1~ ~ (company), and that I am authorized by said company to make this report; and that this report was pre- pared under rny supervision and direction and that the faej~~_~erein are true,._~rrect and complete to the best of my lmowledge. Signature 12 Permit Number: Approval Date:~ PP ~¢1~.~ .... Approved By: . Notice: Before sp41ding in tg~la~~.~fl3_a~°~gu have given ali inforlffigl~lOl~eqSte~ql~Be~llJuttlll~l~l~y correspond- ence will, ith~ls b~ avoid~l ~taska ~.Jept. 0£ ~latuzal See Instruction on Reverse Side ol Form Alaska Oil and Gas Conservation Commission Application to Drill, Deepen or Plug Back Form No. P-1 Authorized by Order No. 1 Effective October 1, 19§8 DESCRtPTIONS INCLUDE: NAME OF LESSEE(S), U,S, GOVERNMENT LEASE SERIAL NUMBER, TRACT NUMBER (ENCIRCLED),, AND TOTAL LEASE ACREAGE. INISKIN PENINSULA UNIT AREA "Exhibit "A"
