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Home My WebLink AboutCO 219Conservation Order Cover Pag~e XHVZE This page is required for administrative purposes in managing the scanning process. It marks the extent of scanning and identifies certain actions that have been taken. Please insure that it retains it's current location in this file. ~-~ a - Conservation Order Category Identifier Organizing RESCAN [] Color items: [] Grayscale items: [] Poor Quality Originals: [] Other: NOTES: DIGITAL DATA [] Diskettes, No. [] Other, No/Type OVERSIZED (Scannable with large plotter/scanner) OVERSIZED (Not suitable for plotter/scanner, may work with 'log' scanner) [] Logs of various kinds [] Other ' BY: MARIA Scanning Preparation TOTAL PAGES Production Scanning Stage I PAGE COUNT FROM SCANNED DOCUMENT: PAGE COUNT MATCHES NUMBER IN SCANNING PREPARATION: YES NO BY: ..... '~.OJl~J MARIA DATE: ~--¢,.~ ~ / . Stage 2 IF NO IN STAGE 1, PAGE(S) DISCREPANCIES WERE FOUND: ~ YES ~ NO (SCANNING IS COMPLETE AT THIS POINT UNLESS SPECIAL ATTENTION IS REQUIRED ON AN INDIVIDUAL PAGE BASIS DUE TO QUALITY, GRAYSCALE OR COLOR IMAGES) General Notes or Comments about this Document: 5/21/03 ConservOrdCvrPg.wpd STATE OF ALASKA ALASKA OIL AND GAS CONSERVATION COMMISSION 3001 Porcupine Drive Anchorage, Alaska 99501-3192 Re: THE APPLICATION OF ARCO ) ALASKA, INC. for ) authorization of a safety ) flare volume for the new ) Central Gas Facility (CGF) ) in the Prudhoe Bay Field, ) Eastern Operating Area. ) Conservation Order No. 219 Prudhoe Oil Pool Prudhoe Bay Field October 13, 1986 IT APPEARING THAT: I , By letter dated September 18, 1986, ARCO Alaska, Inc. requested the Alaska Oil and Gas Conservation Commission (AOGCC) to approve a safety flare volume for the Central Gas Facility (CGF) in the Prudhoe Bay Field, Eastern Operating Area. · Notice for a public hearing on October 27, 1986 was published September 26, 1986 in the Anchorage Daily .News. · Neither a protest nor a request for a public hearing was timely filed. Accordingly, the AOGCC will, in its discretion, issue an order without a public hearing. FINDINGS: 1. · · The CGF is currently being installed in the Eastern Operating Area of the Prudhoe Bay Field. The CGF is scheduled to begin full operation in the spring of 1987. Gas flared in the purging of the natural gas handling facilities and maintaining a safety flare is an operational necessity at production and related facilities to prevent an explosive mixture from occurring, and to ignite any hydrocarbons that are vented during emergencies or operational upsets to avoid the risk of loss of life and property due to explosion and fire from hydrocarbon accumulation. AGO 10023086 Conservation ~r No. 219 October 13, 1986 Page 2 NOW, THEREFORE, IT IS ORDERED THAT Rule 1 of Conservation Order No. 145-A is amended to read: Rule 1. The flaring of gas is approved to maintain safety flares and to permit purging of the gas handling equipment at the rates specified for the following facilities. The daily average rate shall be calculated on a monthly basis. Facility Approved Rate A. Gathering Center No. 1 B. Gathering Center No. 2 C. Gathering Center No. 3 D. Flow Station No. 1 E. Flow Station No. 2 F. Flow Station No. 3 G. Field Fuel Gas Unit & Central Compressor Plant H. Central Gas Facility 1,100 MCF/D 1,100 MCF/D 1,100 MCF/D 1,000 MCF/D 1,000 MCF/D 1,000 MCF/D 1,000 MCF/D 3,000 MCF/D DONE At Anchorage, Alaska and dated October 13, 1986 O~L Alaska Oil and Gas Conservation Commission Lonnie C. Smith, Commissioner Alaska Oil and Gas Conservation Commission W. W. Barnwell, Commissioner Alaska Oil and Gas Conservation Commission AGO 10023087 Notice of Public Hearing STATE OF ALASKA Alaska Oil and Gas Conservation Commission Re: The application of ARCO Alaska, Inc. for authorization of a Safety Flare Volume for the new Central Gas Facility (CGF) in the Prudhoe Bay Field, Eastern Operating Area. The Alaska Oil and Gas Conservation Commission has been requested, by letter dated September 18, 1986, to issue an order to amend Rule 1 of Conservation Order No. 145-A with the addition of the CGF and authorize a daily safety flare rate for the facility. A person who may be harmed if the requested order is issued may file a written protest with the Alaska Oil and Gas Conser- vation Commission, 3001 Porcupine Drive, Anchorage, Alaska 99501 and request a hearing on. the matter. If the protest is filed timely and raises a substantial and material issue crucial to the Commission's determination, a hearing on the matter will be held at the above address at 9:00 a.m. on October 27, 1986, in con- ~ormance with 20 AAC 25.540. If a hearing is to be held, in- terested parties may confirm this by calling the Commission's office, (907) 279-1433, after October 13, 1986. If no proper protest is filed, the Commission will consider the issuance of the order without a hearing. Lonnie C. Smith Commissioner Alaska Oil & Gas Conservation Commission Published September 26, 1986 AGO 10023088 DEPARTMENT OF NATURAL RESOURCES DIVISION OF OIL AND GAS October 2, 1986 BILL SHEFFIELD, GOVE .,0R!'v !' POUCH 7-034 : : /,42 ANCHORAGE, ALASKA 99510~:i- -' 762-4707 i_(i':i .' i/' ::-, .' ,~--~ ~ -:;.. ,,,... - ..,. Lonnie C. Smith, Commissioner Alaska Oil & Gas Conservation Commission 3001 Porcupine Drive Anchorage, Alaska 99501 Re: The application of ARCO Alaska, Inc. for authorization of a Safety Flare Volume for the new Central Gas Facility (CGF) in the Rrudhoe Bay Field, Eastern Operating Area. Dear Mr. Smith: The Division of Oil and Gas does not wish to protest tile amendment of Rule i of Conservation Order Number 145-A, nor are we requesting that a hearing be held. However, the division is requesting that the Alaska Oil & Gas Conservation Commission restrict the safety flare volume to the minimum amount necessary to safely maintain the flare on standby. Acting Director 0387E RECEIVED Alaska Oil & Oas C,:~ns. uommissio~l Anchomcje AGO 100Z3089 I "F STATE OF ALASKA ADVERTISING ORDER A0- ADVERTISING ORDER NO. 08-5573 Anchorage Daily News P. O. Box 149001 Anchorage, Alaska 99514-9001 Alaska Oil & Gas Conservation ~ssion 3001 Porcupine Drive Anchorage, Alaska 99501 AGENCY CONTACT PHONE (907) 279-1433 DATES ADVERTISEMENT REQUIRED: DATE OF A.O. September 24, 1986 September 26, 1986 SPECIAL INSTRUCTIONS: AFFIDAVIT OF PUBLICATION UNITED STATES OF AMERICA STATE OF d~~,~ -- ~¢~.~. DIVISION. SS REMINDER INVOICE MUST BE IN TRIPLICATE AND MUST REFERENCE THE ADVERTISING ORDER NUMBER. A CERTIFIED COPY OF THIS AFFIDAVIT OF PUBLICATION MUST BE SUBMITTED WITH THE INVOICE. BEFORE ME, THE UNDERSIGNED, A NOTARY PUBLIC THIS DAY PERSONALLY APPEARED ~ WHO, BEING FIRST DULY SWORN, ACCORDING TO LAW, SAYS THAT RATE CHARGED THEREON IS NOT IN EXCESS OF THE RATE SUBSCRIBED AND SWORN TO BEFORE ME THIS <~:::::~DAY OF :--~~~-~. ~ 19~<~ NOTARY PUBLIC FOR STATE O'? - ~%~ ~._~ MY COMMISSION EXPIRES ~~,~,~0 ' ..... · L.Le ~ 02-901 (Rev. 6-85) ATTACH PROOF OF PUBLICATION HERE. I NOtice of' public Hearing "" ' I sT,TE, G.F ALASKA I Alaska .OIl'and. Gas '1 CongarvatlonCommlsSlon .. ',/ Rel' The:aPp"c~fl°n''of''ARc° '/Alaska,. lac; :for authorization .:/.of a Safety Flate. 'Volume for .'/;the new Central:Gas Facility "/ (CGF). 'In the:' '.P~'udhoe' Bay. ../Field, Easter, Operating Area. /' The, A~aSka, oll .',~.~'d:' OaS. C0n--r. /vatl°n Comrnih'$10n: has been /requested, bY:~lefler da. ted Sep- / te. mber 18,.'198~; ,to issue, an I order' to am'ehd Rule. 1 of Con? / ssrvatlOn Order :NO;145-A with /:the' a~ldltl0n~ bf !.fhe..cGF and l" ~!'u.tho. rlze. a,;,UaJ. I.Y,', Safety flare /raxe for the~tac',.l:rY.: ,'" I'.A person wtio.may, be. harmed ' I':.']f. the..requel_ted' :order '.'1~' Issued / may file a v~i'ltten protest With /'the Alaska OII .and Gas Cosset- / .Vatlon.commlSslon, 3003' Porcu- /=lne Delve, 'Anchorage, Alaska /:~P~01 and request:., a hearing on :l'the matter... If.. the. pretest Is ,.I.,"fll.d ,timely and, raises a sub- ..[ dtlnflkl ind'. material Issue cru- /.'cial. to the co'mmilsion,s deter- /minationa, .a, 'hearing on the: /matter willi:'be held 'at the /.above addrds'$'., at .9:00 a.m. on October 27, :1'gl&,' in conform- lfice With ..2C~:: AAC 2~ .540. if a .'liear ng IS'",t0, ~":,he. d; ntereSte~l ! a'rtle~ 'ma~:'... c0n. fir.r this by: cPelllng tl~e,com'.m.l!.St! n,s office, (~07:) 279;:l~;.'afte' (ctober 13,' '19~.'If,no prol~r' )rotest. Is 'flied) the cbmmiss,l~ will 'Con, 'sider, the IjJ01'nCe of the order' "withoUt a"hle'ii.l'ng.: ,' ,' /&/Connie(::. ,~mlth , ,. commlsslone¢ :'" ' I Alaska 01'1 'and Gas Conserva- tion commission ' ~' Pub: September 26, 1986, AO-08-,~q73 AGO 10023090 PUBLISHER ARCO Alaska, Inc.i .,.r Post Office L~ox 100360 /,~/'~ Anchorage, ALaska 99510-0350 / e ~' ~7~ I , Telephone 907 276 1215 .,' ~'::,.:" :--;.:' ::" September 18, 1986 Mr. C. V. Chatterton, Chairman Alaska Oil and Gas Conservation Commission (AOGCC) ;:-, :.-~ ".;~ '.~. ,.,-.-.- 3001 Porcupine Drive Anchorage, Alaska 99501-3192 Re: Authorization for Gas Flaring- Safety Flare Volum~-~ ~ Central Gas Facility (CGF) - Prudhoe Bay Field, Eastern Operating Area Dear Mr. Chatterton: ARCO Alaska, Inc. (AAI) requests AOGCC approval of a safety flare volume ~of gas for the maintenance of a safety flare at the CGF. The CGF, which will be the world's largest capacity gas processing plant, arrived on this year's sealift and is scheduled to begin full operation in the spring of 1987. The CGF will be located about one- quarter of a mile due west of the Central Compressor Plant (CCP) and will provide miscible injectant for enhanced oil recovery in the Prudhoe Bay Field, natural gas liquids for blending with the crude stream, and CCP "feedstock" for gas injection activities. The attachments to this letter provide additional information on the CGF's process design, installed equipment, and facility outputs. As discussed in our August 8, 1986 meeting on CGF safety flare volume establishment, AAI requests that a safety volume of 3,000 MSCF per day be allocated to the CGF. Additional data on the various flare components which were used to determine the requested safety flare volume, as well as drawings 'of the flare system location and configuration, are also included as attachments to this letter. It is our understanding that the CGF safety flare volume will be handled as a revision to AOGCC Conservation Order 145-A, which sets safety flare volume limits for existing Prudhoe Bay Unit facilities. CGF safety flare volumes will be reported to the AOGCC on the monthly Producers Report of Gas Disposition as required. At this time, we are in the process of determining the volumes of gas to be flared at the CGF during startup activities. If these examinations indicate that a flare permit will be needed for CGF startup, we will submit a request to the AOGCC for that purpose, as has been done in the past for similar situations at other Prudhoe facilities. If you have any questions or desire additional information, do not hesitate to call me at (907)265-6136. Sincerely, ~ark ~aj or ?rudhoe Bay Operations Coordinator l~/plw:O~3 Attachments = 8 ARCO Alaska, Inc. is a Subsidiary of At[anticRichfie~dCompany ATTACHHENT 1 Central Gas Facility Normal Operation Flare Estimate (MMSCF) Item Continuous Safety Utilities - Purge Gas Estimated Vo 1 ume 0.021 per day Monthly Estimated Flare Volume 0.6 - Pilot Gas - Flare Assist Gas (Variable depending on Flare Rate) 0.120 per day 2.333 per day minimum 21.600 per day maximum 3.7 86.5 TOTAL MONTHLY VOLUME Average Gas Flaring (MMSCF/Day) 90.8 2.9 MAM/plw:049.2 AGO 10023092 I Attachment 2 CENTRAL GAS FACILITY Natural gas is produced at Prudhoe Bay along with oil production, but there is currently no means for transporting this gas off the North Slope. Gas and oil must be separated at Flow Stations and Gathering Centers before the oil is routed to the Trans Alaska Pipeline (TAPS). The natural gas is routed to the Central Compressor Plant (CCP) where it is pumped back into the ground to maintain the oil reservoir pressure. A new plant called the Central Gas Facility (CGF) will be installed near the CCP during 1986 to remove several components from the natural gas stream before it is reinjected into the reservoir. These are "Natural Gas Liquids" or NGLs and Miscible Injectant. Natural gas is a mixture of several fluids. The natural gas produced at Prudhoe Bay is made up of 74% methane, 12% carbon dioxide, 6% ethane, 4% propane, 2% butane, 1% nitrogen, and 1% pentane and "heavier" components which are a natural gasoline. The Central Gas Facility will use a refrigeration system to cool the gas to -45F which will cause several of these components to liquify and separate from the gas. This is the same process that causes dew to form on a lawn or water to condense on a cool drinking glass. Approximately 8% of the gas volume processed by the Central Gas Facility condenses as a liquid mixture. These liquids will be separated into two different streams by heating the mixture in a "Stabilizer". The "lighter" components (carbon dioxide, methane, ethane, and propane) boil and vaporize so they can be taken out of the top of the stabilizer as the Miscible Injectant stream. The "heavier" components (butane, pentane, and others) remain liquid so they can be taken out of the bottom of the stabilizer as the Natural Gas Liquid stream. The Miscible Injectant stream is expected to have an average volume of approximately 250 million standard cubic feet per day. For facilities design and conceptual planning purposes, the Miscible Injectant was assumed to consist of 22% carbon dioxide, 23% methane, 25% ethane, 29% propane, and 1% heavier components. The actual MI composition will vary depending upon current reservoir pressure and operating conditions, but is expected to have a significantly higher methane content. This fluid is distributed to strategically located wells where it is reinjected into the oil reservoir to function as a solvent, lowering the viscosity and improving the flow of oil through the reservoir. This process is a form of Enhanced Oil Recovery (EOR) and is referred to as Tertiary Oil Recovery. Over time, this will result in recovery of more than 100 million barrels of oil which otherwise would not have been produced. The Natural Gas Liquid stream is approximately 40,000 - 50,000 barrels per day consisting of 4% prppane, 58% butane, and 38% pentane and heavier hydro- carbons. These liquids will be blended into the 1 1/2 million barrels per day of oil production for transportation off the North Slope in the Trans Alaska Pipeline. The amount of NGLs which can be blended into the oil is limited to the amount which will remain in solution without vaporizing during the transportation process. AGO lO02BO9B Of the total gas volume processed by the Central Gas Facility, 92% does not condense and is routed to the Central Compressor Plant for reinjection into the oil reservoir. This gas is of a suitable composition to feed future gas sales projects. In fact, the Central Gas Facility will perform much of the gas conditioning that would be required on the front end of any such projects. MAM/plw:061 9-18-86 - 2 - AGO 10023094 0 IO01~gLSOL -- '"' V03 ,~aJ F 0 0 0 (Hr~BHN O00"OS~) BNVdO~d-~ WON ' . .ot?-' ~s' o '~0SS3~03 ]WOA~IB/N33 ~WIS g 1.t01992 NW ONIAIBO (~NIV~I OMi ~0 H0~ NI 3NO) 'S~)1~3~dH03 3NWd0~d #05 ] %001 7.001 ~7'00I I z's~ o'o z'o s'o I s'gb ~'o z'o o'b~ 8'o T'O 5'o "~ E'b B'B~ $'1 0'0 t'S~ ~'q ~'9 I 0'0 L'Z2 ~'08 0'0 ~'~Z Y'l] ~')I I 0'0 0'0 9'0 (% 9OWl NOIII~3~O0 I A11913~ S~D 9~1N33 MOqJ 03IdlqdHIS - 13370Wd ~03/90N · -' ri" rt- Q CENTRAL GAS FACILITY (CGF) Attachment 4 RUDHOE FACILITIES PROJE~~ ' · . · .. ~.. ,.~.~. ',,., ,. ,~ OPERATIONS' OVERVIEW The Central Gas Facility (CGF) treats Flow Station (FS) and Gathering Center (GC) raw. gas by *- a refrigeration/condensation proc- ess. The CGF, located near the CCP, extracts from FS and GC raw gas, miscible injectant (MI) for the Prudhoe Bay tertiary oil recovery program. It also yields natural gas liquid (NGL) for blending into TAPS crude at Skid 50/51. Figure 1 is a perspective drawing .of the complex. Figure 1 '''~¥ corresponds to predicted crude production decline. Increase in MI yield with time results from .recycling of injected MI back from the formation into raw feed gas. Following M! and NGL extraction from raw feed gas, remaining residue gas product returns to the CCP for compression to 4100 psia for gas cap injection. Residue gas production is 3 BSCFD, reflecting a nominal '10 percent shrinkage in CGF raw gas feed through production of Mi and NGL. M! product, compressed to nominal 4100 psia at the CGF, is distributed .by pipeline for crude formation injection at Drillsites and Welipads. Based on 3.3 BSCFD CGF raw feed gas capacity, MI production increases from 207 MMSCFD at 1987 start-of-run (SOR) to 335 MMSCFD at end-of-run (EOR) year 2001; while NGL 'reduces from 50,400 BPD SOR to 30,160 BPD EOR. NGL yield is limited by blendable crude prOduction. Consequently, decline in NCL over the CGF life CGF GENERAL DESCRIPTION The 3.3 billion SCF per day Central Gas Facility will be the worlds largest capacity gas processing plant, when full operation begins in Spring of 1987. Its production of miscible injectant for tertiary oil recovery ,will be the largest of any similar installation. The state of the art electronic Distributed Control System (DCS) permits shift staff to be a minimum of five operators. O O O ~J O of seventeen The facility consists housed modules, co~[ ructed in Tacoma, Washington, and fourteen exposed skids, assembled overseas and directly barged to Prudhoe Bay. The Tacoma constructed modules form part of the biggest barge flotilla of oil field production material since construction began on Alaska's North Slope; the summer 1986 Sealift convoy will stretch 200 miles. Total Shipping weight of the CGF modules and skids is #3,200 tons. The largest 2,300 ton Refrigerant Compression module approaches the present capacity limit for barge transportation. The smallest unit is the 165 ton Methanol/Diesel skid. The final assembled complex will be almost 800 feet in length, nearly equivalent to three football fields. The CGF incorporates the world's largest gas turbine driver refrigeration compression system. Operating turbine horsepower is 70,000 BHP. "The two booster compressor stages and. the miscible injectant (MI) compressors .are also among the world's largest. The MI compressors are the first ever tested in Hydrocarbon Class I test. The Class I test simulated MI gas composition and process conditions at the manufac, turers site. The flare system, with a maximum capacity of 4.6 billion SCFD, is the largest capacity smokeless flaring system ever installed. Piping. material installed in CGF stretches over 30 miles, diameters range from 1/2 inch to 60 inches. Fittings include 9,400 flanges, 12,500 BW (butt weld) fittings and 10,200 valves. The largest 60 inch diameter valves are each 9 feet long by 18 feet high and weigh 47 tons. Combined length of heat exchanger. tubing in Low Temperature Sep- aration system gas/gas exchanger~ is 885' miles. Total length of all LTD system exchanger tubing stretches over 1,100 miles. CGF air cooler tubing combined reaches one million linear feet, and air coolers cover approximately I-1/2 acres. Construction materials for the CGF add .up to~r 17,600 tons of structural steel. Over 500,000 -square feet of insulated mater~l, attached with 300,000 screws and 16 miles of sealant. Almost 900,000 square feet of gypsum wallboard, weighing 800 . tons (enough for 550 three bedroom houses) with 850,000 gypsum board screws and 15 miles of metal studs. 300,000 square feet of acoustical boards, enough for an average 60 story high-rise building, and over one mile of intermodular 'expansion joints. The electrical system contains 30 miles of power cables and 3 miles of cable trays. The 4.16 KV and 480 volt power distribution system drives a 16,000 HP load. The system is controlled by 15 subStations, 27 MCC's (Motor Con- trol Center), 7 UPS (Uninter- ruptable Power Supply)' and 85 electrical panels. InstrUment and FP (Fire Protection) cables stretch over 32 miles. Final assembly of CGF modules/ skids in Prudhoe Bay requires welding of 439 welds and 706 bolt ups at the unit interfaces. · · AGO 10023097 · · ' LAY Z9 '' t~ I ' .~ c~ ,u ~.' ~s~ 650 - ~. v,,. ~¢ o · ~ , ARCO 'l . ccOg' ' g