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HomeMy WebLinkAboutOil-Northstar-NorthstarAlaska Oil and Gas Conservation Commisssion - Pool Statistics, Unit and Pool Home Orders Staff Calendar Contact Us AOGCC Pool Statistics Northstar Unit, Northstar Oil Pool Alaska Oil and Gas Conservation Commission > Annual Reports > Pool Statistics - 2004: Updated 25 July 2005 Page: 1 > 2 > 3 Operator: BP Exploration (Alaska) INC. Discovery Well: Shell Western E&P INC. Seal Island BF-47 No. 1 Permit #183-074 API No. 50-029-20954-00-00 Sec. 02, T13N, R13E, UM Depth: 14,541’ MD / 12,461' TVD January 30, 1984 Status: Producing Location: Arctic Ocean Area Location Map Unit Location Map DNR Unit Map Orders: Complete List Summary: Northstar Island is a five-acre, man-made island located in the Beaufort Sea, 12 miles northwest of Prudhoe Bay and 6 miles offshore. Discovered by the Shell Island BF-47 No. 1 exploration well in 1984, construction of the development island began during the winter of 1999-2000, and the first production modules were installed during 2000. Northstar is connected to onshore processing facilities by a pipeline that is buried 7 to 11 feet below the seafloor to avoid ice impacts. This pipeline has a wall thickness triple those of typical onshore North Slope pipelines, and three separate leak detection systems. Regular production began in November 2001, and climbed rapidly, regularly exceeding 50,000 barrels of oil per day (“BOPD”) by June 2002 and 70,000 BOPD by June 2003. During mid-February, 2004, failure of a compressor motor shut down production from Northstar for two weeks, resulting a “loss”(delay) of about 1 million barrels of oil production. For all of 2004, the pool produced at an average rate of 68,700 BOPD. The Northstar development area spans the boundary between State of Alaska and Federal waters, and the Federal percentage Northstar production is allocated at 17.840%. During 2004, the Federal portion of Northstar oil production was 4,474,097 barrels for an average rate of 12,224 BOPD. Geology: The Northstar Oil Pool is defined as the accumulation of hydrocarbons common to and correlating with the interval between measured depths of 12,418 feet and 13,044 feet the Seal A-01 well. The reservoir interval consists of the Sag River, Shublik, and Ivishak Formations. The Sag River Formation is typically 100 feet thick in this area, and it was deposited as Triassic-aged transgressive marine sandstone, siltstone and shale. The sandstone mineralogy is mature: quartz with minor amounts of feldspar and authigenic clay. The primary cementing agents are calcite, silica and siderite. The Shublik Formation is also Triassic-aged, and is stratigraphically complex, being characterized by marine siltstone, shale, sandstone and phosphatic limestone. Within the Shublik Formation, reservoir quality rock is limited to a basal sandstone member, the Shublik D. The Ivishak Formation comprises a series of Permian and Triassic-aged delta-front sandstones and shales that grade upward to fluvial sandstone and medium to coarse-grained pebbly conglomerates. Within the pool, the Ivishak is about 325 feet thick, and it is more proximal, coarser grained, more deeply buried and cemented than at the Prudhoe Bay Field. Here, the Ivishak is primarily cemented with calcite, silica and siderite. The pool structure consists of a faulted anticline defined by three-way dip closure on west, south and east. Closure to the north is obtained through fault seal or structural dip. Faults within the pool have interpreted maximum vertical displacements of less than 200 feet, and they are not expected to significantly effect reservoir performance. The oil-water contact is placed at 11,100 feet true vertical depth subsea, based on core, RFT, MDT and well test data. Operator-provided estimates of hydrocarbons in place for the Northstar Oil Pool suggest an original oil in place of 247 million stock tank barrels, 7 billion cubic feet ("BCF") of gas in an inferred gas cap, and 480 BCF total gas including solution gas. Structure Map Strat Column Type Log Orig. Oil in Place:247 MMSTB (CO 458) Orig. Gas in Place:480 MMSTB including 7 BCF in gas cap (CO 458) Production: Prod Chart Prod Report Prod Data http://www.state.ak.us/local/akpages/ADMIN/ogc/annual/2004/Oil_Pools/Northstar-%20Oil/1_Oil_1.htm (1 of 2) [3/28/2008 5:18:30 PM] Alaska Oil and Gas Conservation Commisssion - Pool Statistics, Unit and Pool Oil (bbls) NGL (bbls) Gas (mcf) Water (bbls) Cumulative 67,214,704 0 225,546,155 3,870,835 2001 Total 1,265,552 0 2,686,066 7,086 2002 Total 17,902,653 0 47,615,650 152,461 2003 Total 22,968,022 0 70,861,557 894,229 2004 Total 25,078,477 0 104,382,882 2,817,059 2003 Daily Rate 62,926 0 194,141 2,450 2004 Daily Rate 68,708 0 285,980 7,718 Change (%)9%0 47%215% Continued: 1 > 2 > 3 1_Oil_1 Home Orders Staff Calendar Contact Us Webmaster http://www.state.ak.us/local/akpages/ADMIN/ogc/annual/2004/Oil_Pools/Northstar-%20Oil/1_Oil_1.htm (2 of 2) [3/28/2008 5:18:30 PM] Alaska Oil and Gas Conservation Commisssion - Pool Statistics, Unit and Pool Home Orders Staff Calendar Contact Us AOGCC Pool Statistics Northstar Unit, Northstar Oil Pool Alaska Oil and Gas Conservation Commission > Annual Reports > Pool Statistics - 2004: Updated 25 July 2005 Page: 1 > 2 > 3 EOR Injection:Disposal Injection in Field: Chart Report Data Chart Report Data Gas (Mcf)Water Disposed Fluids Cumulative 300,862,589 0 Cumulative 5,448,217 2001 Total 3,696,775 0 2001 Total 290,113 2002 Total 64,396,277 0 2002 Total 935,119 2003 Total 101,268,254 0 2003 Total 1,193,004 2004 Total 131,501,283 0 2004 Total 3,029,981 2003 Rate (per day) 277,477 0 2003 Rate (per day) 3,269 2004 Rate (per day) 360,277 0 2004 Rate (per day) 8,301 Change (%) 30% 0 Change (%) 154% Field Development Information: Wells In Field Type Well Status 2004 2003 2002 2001 2000 Producer Oil Producer 15 14 6 2 0 Injector Water Injector 0 1 0 0 0 Gas Injector 6 3 2 1 0 WAG Injector 0 1 1 1 0 Water Supply 0 0 0 0 0 Disposal 2 1 1 1 0 Non-Operating Opr Shut Down 0 0 1 2 0 Suspended 1 1 1 0 0 Abandoned 0 0 0 7 7 Total 24 21 12 *14 *7 * 7 P&A Exploratory Wells have delineated this field. Active Completions in Pool (Month of December): Type Well Status 2004 2003 2002 2001 2000 Oil Producer Flowing 15 11 6 2 0 Gas Lift 0 0 0 0 0 Shut-In 0 2 0 0 0 Service Well Water Injector 0 0 0 1 0 Gas Injector 5 4 3 1 0 WAG Injector 0 0 0 0 0 Water Supply 0 0 0 0 0 Shut-In 1 1 0 0 0 Disposal Undef.Disposal Injector 1 1 1 1 0 Shut-In 1 0 0 0 0 Total 23 19 10 5 0 Continued: 1 > 2 > 3 Home Orders Staff Calendar Contact Us Webmaster http://www.state.ak.us/local/akpages/ADMIN/ogc/annual/2004/Oil_Pools/Northstar-%20Oil/1_Oil_2.htm [3/28/2008 5:18:36 PM] Alaska Oil and Gas Conservation Commisssion - Pool Statistics, Unit and Pool Home Orders Staff Calendar Contact Us AOGCC Pool Statistics Northstar Unit, Northstar Oil Pool Alaska Oil and Gas Conservation Commission > Annual Reports > Pool Statistics - 2004: Updated 25 July 2005 Page: 1 > 2 > 3 Permitted Wells in Field: Type Well Status 2004 2003 2002 2001 2000 Development New 0 0 13 6 0 Sidetrack 0 0 0 0 0 Multilateral 0 0 0 0 0 Service New 0 2 1 1 0 Sidetrack 0 0 0 0 0 Multilateral 0 0 0 0 0 Exploration New 0 0 0 0 0 Sidetrack 0 0 0 0 0 Total 0 2 14 7 0 Reservoir Properties: Description 2004 2003 2002 2001 2000 Reference Datum - ft. below sea level 11100 11100 11100 11100 11100 Temperature - ° F 254 254 247 247 247 Porosity - % 15 15 15 15 15 Permeability - md 10-366 200 53 53 53 Swi - % 55 55 58 58 58 Oil Viscosity @ Orig. Press. cp .14 .14 .14 .14 .14 Oil Viscosity @ Sat. Press. cp .14 ---- Orig. Press. - psi 5300 5300 5290 5290 5290 Bubble Point - psi 4960 4960 5010 5010 5010 Current Reservoir Press. - psi 5160 5187 5175 5175 5290 Oil Gravity - ° API 44 44 44 44 44 Gas Specific Gravity (Air = 1.0).8 .8 .8 .8 .8 Gross Pay - ft.121 121 130 130 130 Net Pay - ft.113 113 125 125 125 Orig. FVF - RB/STB 2.2 2.3 2.2 2.2 2.2 Bubble Point FVF - RB/STB 2.3 ---- Orig. GOR - SCF/STB 2150 2100 2150 2150 2150 GOR (current yr.) - SCF/STB 4162 3085 2660 2122 - References / Summary Continued: 1 > 2 > 3 Home Orders Staff Calendar Contact Us Webmaster http://www.state.ak.us/local/akpages/ADMIN/ogc/annual/2004/Oil_Pools/Northstar-%20Oil/1_Oil_3.htm [3/28/2008 5:18:41 PM] State of Alaska, Oil and Gas Conservation Commission Production History for: Month Oil (BBL)Gas (MCF)Water (BBLDaysProd Wells Producing NORTHSTAR, NORTHSTAR OIL Pool Jan 1958 Dec 2004 Oct 2001 363 746 01 1 Nov 2001 353070 762654 126054 2 Dec 2001 912119 1922666 582656 2 1265552 2686066 7086Year Total Jan 2002 1106393 2371951 402578 3 Feb 2002 1011221 1808454 219286 4 Mar 2002 1554091 3005458 2214134 5 Apr 2002 1092774 2348619 38492 5 May 2002 1083388 2496116 1231132 6 Jun 2002 1827325 4470141 3719173 6 Jul 2002 1772269 4919165 9527176 7 Aug 2002 1846220 5563595 17402185 6 Sep 2002 1356555 3661002 13963158 6 Oct 2002 1858524 5589003 34269174 6 Nov 2002 1678500 5417074 28861168 6 Dec 2002 1715393 5965072 34674184 6 17902653 47615650 152461Year Total Jan 2003 1514557 5356036 25583183 8 Feb 2003 1992106 6167624 56022243 9 Mar 2003 1955963 6971443 84264274 9 Apr 2003 1355557 4659382 49375210 10 May 2003 2067781 6605755 72340330 12 Jun 2003 2141501 7109864 67223351 12 Jul 2003 1907547 6473155 61206353 12 Aug 2003 1904771 5811839 66209322 13 Sep 2003 2064610 4394750 89999300 13 Oct 2003 2325081 6451658 111597341 11 Nov 2003 1908148 5490566 113186289 12 Dec 2003 1830400 5369485 97225265 11 22968022 70861557 894229Year Total Jan 2004 2439547 7259210 174855333 11 Feb 2004 1140067 3445664 86573171 12 Mar 2004 2252145 7421939 173380321 11 Apr 2004 1901916 6659911 162910312 13 May 2004 2336229 9943734 190675368 13 Jun 2004 2188374 9447001 239292368 14 Jul 2004 2165121 10317879 264002392 13 Aug 2004 1538797 6349335 200058310 15 Sep 2004 2289965 10332264 307306398 14 Oct 2004 2306964 10253492 354728393 14 Nov 2004 2213766 10962097 313590364 14 Dec 2004 2305586 11990356 349690410 15 25078477 104382882 2817059Year Total 67,214,704 225,546,155 3,870,835Pool Total 5/20/2005 Page 1 of 1 State of Alaska, Oil and Gas Conservation Commission Injection History for: Month Liquid (BBL)Gas (MCF)DaysInj Wells Injecting NORTHSTAR, NORTHSTAR OIL Pool Oct 2001 0 2076031 Nov 2001 0 105659130 1 Dec 2001 0 261942433 2 Year Total 0 3696775 Jan 2002 0 337102930 1 Feb 2002 0 266986337 2 Mar 2002 0 509687962 2 Apr 2002 0 424746056 2 May 2002 0 342027461 2 Jun 2002 0 550763158 2 Jul 2002 0 663554862 2 Aug 2002 0 713819387 3 Sep 2002 0 509626390 3 Oct 2002 0 694028393 3 Nov 2002 0 669421784 3 Dec 2002 0 757863793 3 Year Total 0 64396277 Jan 2003 0 765715286 3 Feb 2003 0 795385284 3 Mar 2003 0 9441988113 4 Apr 2003 0 7232108119 4 May 2003 0 8133291112 4 Jun 2003 0 9558704120 4 Jul 2003 0 8922071152 5 Aug 2003 0 8477537151 5 Sep 2003 0 7359483123 5 Oct 2003 0 9633359124 4 Nov 2003 0 8340782121 5 Dec 2003 0 8557927120 4 Year Total 0 101268254 Jan 2004 0 10257349124 4 Feb 2004 0 566179085 4 Mar 2004 0 10307074145 5 Apr 2004 0 8548026166 6 May 2004 0 12047303186 6 Jun 2004 0 10738590179 6 Jul 2004 0 11642745186 6 Aug 2004 0 8264065160 6 Sep 2004 0 13044653159 6 Oct 2004 0 12836336155 5 Nov 2004 0 13779562150 5 Dec 2004 0 14373790155 5 Year Total 0 131501283 Pool Total 0 300,862,589 5/20/2005 Page 1 of 1 State of Alaska, Oil and Gas Conservation Commission Injection History for: Month Liquid (BBL)Gas (MCF)DaysInj Wells Injecting NORTHSTAR, UNDEFINED WDSP Pool Jan 2001 5183 061 Feb 2001 19782 028 1 Mar 2001 23410 031 1 Apr 2001 21487 030 1 May 2001 28633 031 1 Jun 2001 30351 030 1 Jul 2001 19608 031 1 Aug 2001 17369 031 1 Sep 2001 21983 030 1 Oct 2001 21305 031 1 Nov 2001 25627 030 1 Dec 2001 55375 031 1 Year Total 290113 0 Jan 2002 63768 031 1 Feb 2002 90894 028 1 Mar 2002 106840 031 1 Apr 2002 67025 030 1 May 2002 63138 031 1 Jun 2002 72281 030 1 Jul 2002 85741 031 1 Aug 2002 56560 031 1 Sep 2002 69746 030 1 Oct 2002 83675 031 1 Nov 2002 98065 030 1 Dec 2002 77386 031 1 Year Total 935119 0 Jan 2003 81997 031 1 Feb 2003 83815 028 1 Mar 2003 111020 031 1 Apr 2003 92338 030 1 May 2003 108117 031 1 Jun 2003 88583 030 1 Jul 2003 70441 031 1 Aug 2003 72551 031 1 Sep 2003 98103 030 1 Oct 2003 122086 031 1 Nov 2003 125175 030 1 Dec 2003 138778 031 1 Year Total 1193004 0 5/20/2005 Page 1 of 2 State of Alaska, Oil and Gas Conservation Commission Injection History for: Month Liquid (BBL)Gas (MCF)DaysInj Wells Injecting NORTHSTAR, UNDEFINED WDSP Pool Jan 2004 195430 031 1 Feb 2004 130573 029 1 Mar 2004 224756 031 1 Apr 2004 196749 030 1 May 2004 197711 031 1 Jun 2004 245057 030 1 Jul 2004 266305 033 2 Aug 2004 212038 032 2 Sep 2004 312999 030 1 Oct 2004 361447 031 1 Nov 2004 324574 030 1 Dec 2004 362342 031 1 Year Total 3029981 0 Pool Total 5,448,217 0 5/20/2005 Page 2 of 2 14 N13 N14 E13 E13 N36 31 6 36 1 31 6 36 1 31 6 36 1 31 6 BF-47 SEAL IS A-2 BF-57 SEAL IS A-4 NORTHSTAR 2 NORTHSTAR 3 NORTHSTAR 1 NS-26 NS-29 NS-27 NS-10 NS-31 Beaufort SeaNorthstar Unit N AOGCC Northstar Unit LOCATION MAP0 3 miles Bottom hole locations of confidential development wells are shown in red. 263 AOGCCNorthstar UnitSTRUCTURE MAPREPRODUCED WITH OPERATOR PERMISSIONMODIFIED FROM ORIGINAL SUBMITTAL BY AOGCC0 1 mileN264 Deadhorse Harrison Bay Dalton HwyTrans-AlaskaPipelineNuiqsut NPRA B e a u f o r t S e a North Slope, Alaska Modified from AK DNR Div. Oil & Gas 2005 Northstar Oil Pool NORTHSTAR UNIT DUCK ISLAND UNIT COLVILLE RIVERUNIT MILNE POINTUNIT KUPARUK RIVERUNIT PRUDHOE BAY UNIT OOOGURUKUNIT TUVAAQUNIT NIKAITCHUQUNIT Reference List NORTHSTAR, NORTHSTAR OIL Alaska Oil and Gas Conservation Commission, 2001, Conservation Order No. 458, Northstar Field , Northstar Oil Pool; available on line at http://www.aogcc.alaska.gov/orders/co/co400_499/co458.htm Alaska Oil and Gas Conservation Commission, 2005, Well and Production Information Database BP, 2001, Public Information, Northstar Unit, Beaufort Sea, Alaska, in Alaska Oil and Gas Conservation Commission, 2001, Conservation Order No. 458 File, p. 119, 138. Minerals Management Service, 2005, Annual Production Totals for the Federal OCS Northstar Project: available online at http://www.mms.gov/alaska/fo/annual_production.pdf PI/Dwights, 2004, Beaufort Sea's Northstar Field Resumes Production; in PI/Dwights Drilling Wire, V. 50, No. 9, March 3, 2004 9/16/2005 Page 1 of 1 Northstar, Northstar Oil Summary Northstar Island is a five-acre,1 man-made island located in the Beaufort Sea, 12 miles northwest of Prudhoe Bay and 6 miles offshore. Discovered by the Shell Island BF-47 No. 1 exploration well in 1984, construction of the development island began during the winter of 1999-2000, and the first production modules were installed during 2000.2 Northstar is connected to onshore processing facilities by a pipeline that is buried 7 to 11 feet below the seafloor to avoid ice impacts.3 This pipeline has a wall thickness triple those of typical onshore North Slope pipelines, and three separate leak detection systems.4 Regular production began in November 2001, and climbed rapidly, regularly exceeding 50,000 barrels of oil per day (“BOPD”) by June 2002 and 70,000 BOPD by June 2003. 5 During mid-February, 2004, failure of a compressor motor shut down production from Northstar for two weeks, resulting a “loss” (delay) of about 1 million barrels of oil production.6 For all of 2004, the pool produced at an average rate of 68,700 BOPD.7 The Northstar development area spans the boundary between State of Alaska and Federal waters, and the Federal percentage Northstar production is allocated at 17.840%. During 2004, the Federal portion of Northstar oil production was 4,474,097 barrels for an average rate of 12,224 BOPD.8 Geology The Northstar Oil Pool is defined as the accumulation of hydrocarbons common to and correlating with the interval between measured depths of 12,418 feet and 13,044 feet the Seal A-01 well. The reservoir interval consists of the Sag River, Shublik, and Ivishak Formations. The Sag River Formation is typically 100 feet thick in this area, and it was deposited as Triassic-aged transgressive marine sandstone, siltstone and shale. The sandstone mineralogy is mature: quartz with minor amounts of feldspar and authigenic clay. The primary cementing agents are calcite, silica and siderite. The Shublik Formation is also Triassic-aged, and is stratigraphically complex, being characterized by marine siltstone, shale, sandstone and phosphatic limestone. Within the Shublik Formation, reservoir quality rock is limited to a basal sandstone member, the Shublik D. The Ivishak Formation comprises a series of Permian and Triassic-aged delta-front sandstones and shales that grade upward to fluvial sandstone and medium to coarse-grained pebbly conglomerates. Within the pool, the Ivishak is about 325 feet thick, and it is more proximal, coarser grained, more deeply buried and cemented than at the Prudhoe Bay Field. Here, the Ivishak is primarily cemented with calcite, silica and siderite. The pool structure consists of a faulted anticline defined by three-way dip closure on west, south and east. Closure to the north is obtained through fault seal or structural dip. Faults within the pool have interpreted maximum vertical displacements of less than 200 feet, and they are not expected to significantly effect reservoir performance. The oil-water contact is placed at 11,100 feet true vertical depth subsea, based on core, RFT, MDT and well test data.9 Operator-provided estimates of hydrocarbons in place for the Northstar Oil Pool suggest an original oil in place of 247 million stock tank barrels, 7 billion cubic feet ("BCF") of gas in an inferred gas cap, and 480 BCF total gas including solution gas.10 SFD September 16, 2005 1 BP, 2003, North Slope Oil Fields, published as alaska_north_slope_oilfields[1].pdf available online through link on BP Web Site at http://www.bp.com/sectiongenericarticle.do?categoryId=2011310&contentId=2016538, p. 2 2 PI/Dwights, 2004, Beaufort Sea's Northstar Field Resumes Production; in PI/Dwights Drilling Wire, V. 50, No. 9, March 3, 2004 3 PI/Dwights, 2004, Beaufort Sea's Northstar Field Resumes Production; in PI/Dwights Drilling Wire, V. 50, No. 9, March 3, 2004 4 BP, 2003, North Slope Oil Fields, published as alaska_north_slope_oilfields[1].pdf available online through link on BP Web Site at http://www.bp.com/sectiongenericarticle.do?categoryId=2011310&contentId=2016538, p. 2 5 Alaska Oil and Gas Conservation Commission, 2005, Well and Production Information Database 6 PI/Dwights, 2004, Beaufort Sea's Northstar Field Resumes Production; in PI/Dwights Drilling Wire, V. 50, No. 9, March 3, 2004 7 Alaska Oil and Gas Conservation Commission, 2005, Well and Production Information Database 8 Minerals Management Service, 2005, Annual Production Totals for the Federal OCS Northstar Project: available online at http://www.mms.gov/alaska/fo/annual_production.pdf 9 Alaska Oil and Gas Conservation Commission, 2001, Conservation Order No. 458, Northstar Field, Northstar Oil Pool ; http://www.state.ak.us/local/akpages/ADMIN/ogc/orders/co/co400_499/co458.htm 10 BP, 2001, Public Information, Northstar Unit, Beaufort Sea, Alaska, in Alaska Oil and Gas Conservation Commission, 2001, Conservation Order No. 458 File, p. 119. AAOrder No.DateOperator Description Current NORTHSTAR FIELD NORTHSTAR OIL POOL Current Orders 551 0CO 11-Feb-05 Adoption of rules regulating the use of multiphase meters for well testing and allocation of production. Y 502 0CO 16-Oct-03BP EXPLORATI Rules regulating sustained casing pressures in development wells within the Northstar Field. Y 458 0ACO 20-Nov-02BP EXPLORATI Request for a variance from the setting depth requirements of 20 AAC 25.265(a)(2) for SSSV, in order to allow a SSSV setting depth to 500' in Northstar Wells. Y 23 0AIO 09-Oct-01BP EXPLORATI Authorizes underground injection of fluids for enhanced recovery in Northstar Oil Pool Y AAOrder No.DateOperator Description Current NORTHSTAR FIELD NORTHSTAR OIL POOL Obsolete Orders 458 0CO 09-Oct-01BP EXPLORATI Pool Rules for development of Northstar Oil Pool. Amended by CO 502. N AAOrder No.DateOperator Description Current NORTHSTAR FIELD UNDEFINED WDSP POOL Current Orders 551 0CO 11-Feb-05 Adoption of rules regulating the use of multiphase meters for well testing and allocation of production. Y AAOrder No.DateOperator Description Current NORTHSTAR FIELD *No Pool* Spacing Exception Orders 322 0CO 04-Nov-93AMERADA HES Spacing exception for Northstar #3 well.Y Northstar 048121620Producing Oil WellsNORTHSTAR FIELD, NORTHSTAR OIL POOL020406080100Water Cut ( % )NORTHSTAR FIELD, NORTHSTAR OIL POOL0.10.51510501005001000Cum Oil Prod ( MMbbl )Cum Water Prod ( MMbbl )Cum Gas Prod ( MMMcf )NORTHSTAR FIELD, NORTHSTAR OIL POOL20010203040.010.050.10.5151050100Oil Rate (CD) ( Mbbl/d )Water Rate (CD) ( Mbbl/d )Gas Rate (CD) ( MMcf/d )Gas / Oil Ratio ( Mcf/bbl )NORTHSTAR FIELD, NORTHSTAR OIL POOL 0246810Wells on Gas InjectionWells on Water InjectionNORTHSTAR FIELD, NORTHSTAR OIL POOL - EOR INJECTION0.10.51510501005001000Cum Gas Inj ( MMMcf )Cum Water Inj ( MMbbl )NORTHSTAR FIELD, NORTHSTAR OIL POOL - EOR INJECTION20010203040.11101001000Gas Inj Rate (CD) ( MMcf/d )Water Inj Rate (CD) ( Mbbl/d )NORTHSTAR FIELD, NORTHSTAR OIL POOL - EOR INJECTION 0.01.02.0Disposal WellsNORTHSTAR FIELD, UNDEFINED WASTE DISPOSAL POOL0.010.050.10.51510Cum Water Disp ( MMbbl )NORTHSTAR FIELD, UNDEFINED WASTE DISPOSAL POOL2001020304102103104105Waste Disposal Rate ( bbl/d )NORTHSTAR FIELD, UNDEFINED WASTE DISPOSAL POOL