Alaska Logo
Department of Commerce, Community, and Economic Development
Alaska Oil and Gas Conservation
Commission
Loading...
HomeMy WebLinkAboutOil-Endicott-IvishakAlaska Oil and Gas Conservation Commisssion - Pool Statistics, Unit and Pool Home Orders Staff Calendar Contact Us AOGCC Pool Statistics Endicott Unit, Ivishak Oil Pool Alaska Oil and Gas Conservation Commission > Annual Reports > Pool Statistics - 2004: Updated 11 July 2005 Page: 1 > 2 > 3 Operator: BP Exploration (Alaska) INC. Discovery Well: Sohio Sag Delta 34633 No. 4 Permit #177-015 API No. 50-029-20245-00-00 Sec. 35, T12N, R16E, UM Depth: 12,855’ MD / 10,895' TVD March 13, 1978 Status: Producing Location: Central Arctic Slope Area Location Map Unit Location Map DNR Unit Map Orders: Complete List Summary: The Ivishak Oil Pool of the Endicott Field (“EIOP”) lies beneath the Beaufort Sea and within the Duck Island Unit, about 8 miles east of Prudhoe Bay Unit (“PBU“). The Sag Delta No. 9 exploratory discovered this pool in 1982 well. This pool is the accumulation of hydrocarbons that is common to, and correlates with, Sag Delta No. 9 between the measured depths of 12,069’ and 12,314’. The EIOP has been developed from the Main Production artificial island that is located approximately 4 miles offshore in 2 to 14 feet of water. The pool has been producing continuously since July 1989. During the peak production years from November 1990 and November 1991, EIOP production ranged from 12,308 to 5,005 barrels of oil per day (“BOPD”), and averaged about 7,270 BOPD. Between December 1991 and June 1993, production dropped to an average of 2,650 BOPD. Since July 1993, production has slowly declined. During 2004, the EIOP averaged 83 BOPD from two production wells. Geology: The pool encompasses reservoirs assigned to the Triassic-aged Ivishak Formation, which is a member of the Sadlerochit Group. This formation was deposited in a marine shoreface environment. The pool is bounded to the south by a major fault and there appears to be numerous smaller faults within the accumulations. The pool encompasses an area of approximately 380 acres, and it appears to be separate from other, nearby accumulations based on pressure measurements and oil gravity. The base of the Ivishak oil column appears to be planar, and is underlain by a tar mat, which separates the oil from the underlying aquifer. No gas cap has been observed. Oil gravity averages 25° API within the pool. The temperature is 212°F at 10,000 feet true vertical depth. Original oil in place is estimated to be approximately 14 million stock tank barrels (STB). Structure Map Strat Column Type Log Orig. Oil in Place: 14 MMSTB (Conservation Order 275) Production: Prod Chart Prod Report Prod Data Oil (bbls) NGL (bbls) Gas (mcf) Water (bbls) Cumulative 7,947,905 111,483 6,507,571 31,244,673 2001 Total 141,785 947 93,232 2,512,499 2002 Total 144,879 953 95,579 2,562,549 2003 Total 91,649 604 64,026 1,865,081 2004 Total 30,247 150 19,827 729,358 2003 Daily Rate 251 2 175 5,110 2004 Daily Rate 83 .41 54 1998 Change (%)-67%-80%-69%-61% Continued: 1 > 2 > 3 Home Orders Staff Calendar Contact Us Webmaster http://www.state.ak.us/local/akpages/ADMIN/ogc/annua...ndicott%20-%20Oil/Endicott,Ivishak%20Oil/1_Oil_1.htm [3/20/2008 4:44:51 PM] Alaska Oil and Gas Conservation Commisssion - Pool Statistics, Unit and Pool Home Orders Staff Calendar Contact Us AOGCC Pool Statistics Endicott Unit, Ivishak Oil Pool Alaska Oil and Gas Conservation Commission > Annual Reports > Pool Statistics - 2004: Updated 11 July 2005 Page: 1 > 2 > 3 EOR Injection:Disposal Injection in Field: Chart Report Data Chart Report Data Gas (Mcf)Water Disposed Fluids Cumulative 0 40,853,972 Cumulative 5,876,300 2001 Total 0 3,539,737 2001 Total 3714 2002 Total 0 3,316,307 2002 Total 0 2003 Total 0 3,356,749 2003 Total 325 2004 Total 0 3,211,661 2004 Total 2,427 2003 Rate (per day) 0 9,197 2003 Rate (per day) 1 2004 Rate (per day) 0 8,799 2004 Rate (per day) 7 Change (%) 0 -4%Change (%) 600% Field Development Information: Wells In Field Type Well Status 2004 2003 2002 2001 2000 Producer Oil Producer 76 75 72 72 72 Injector Water Injector 24 26 26 26 29 Gas Injector 5 5 5 5 5 WAG Injector 4 3 3 3 0 Water Supply 1 1 1 1 1 Disposal 1 1 1 1 1 Non-Operating Suspended 1 1 4 4 1 Abandoned 31 28 24 24 22 Total 143 140 136 136 131 Active Completions in Pool (Month of December): Type Well Status 2004 2003 2002 2001 2000 Oil Producer Flowing 0 0 0 0 0 Gas Lift 0 1 2 2 2 Shut-In 2 1 0 0 0 Service Well Water Injector 2 2 2 2 2 Gas Injector 0 0 0 0 0 WAG Injector 0 0 0 0 0 Water Supply 0 0 0 0 0 Shut-In 0 0 0 0 1 Disposal Undef.Disposal Injector 0 0 0 0 0 Shut-In 0 0 0 0 0 Total 4 4 4 4 4 Continued: 1 > 2 > 3 Home Orders Staff Calendar Contact Us Webmaster http://www.state.ak.us/local/akpages/ADMIN/ogc/annua...ndicott%20-%20Oil/Endicott,Ivishak%20Oil/1_Oil_2.htm [3/20/2008 4:45:02 PM] Alaska Oil and Gas Conservation Commisssion - Pool Statistics, Unit and Pool Home Orders Staff Calendar Contact Us AOGCC Pool Statistics Endicott Unit, Ivishak Oil Pool Alaska Oil and Gas Conservation Commission > Annual Reports > Pool Statistics - 2004: Updated 11 July 2005 Page: 1 > 2 > 3 Permitted Wells in Field: Type Well Status 2004 2003 2002 2001 2000 Development New 0 0 0 0 0 Sidetrack 0 7 0 0 0 Multilateral 0 0 2 0 0 Service New 0 0 0 0 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 7 2 0 0 Reservoir Properties: Description 2004 2003 2002 2001 2000 Reference Datum - ft. below sea level 10000 10000 10000 10000 10000 Temperature - ° F 212 212 212 212 212 Porosity - % 20 20 20 20 20 Permeability - md 2-600 2-600 2-600 2-600 2-600 Swi - % - - - - - Oil Viscosity @ Orig. Press. cp - - - - - Oil Viscosity @ Sat. Press. cp ----.- Orig. Press. - psi 4825 4825 4635 4635 4635 Bubble Point - psi ----- Current Reservoir Press. - psi 4600 4500 4500 4500 4800 Oil Gravity - ° API 25 25 25 25 25 Gas Specific Gravity (Air = 1.0)----- Gross Pay - ft.----- Net Pay - ft.----- Orig. FVF - RB/STB ----- Bubble Point FVF - RB/STB ----- Orig. GOR - SCF/STB 700 700 700 700 700 GOR (current yr.) - SCF/STB 655 699 660 658 639 References / Summary Continued: 1 > 2 > 3 Home Orders Staff Calendar Contact Us Webmaster http://www.state.ak.us/local/akpages/ADMIN/ogc/annua...ndicott%20-%20Oil/Endicott,Ivishak%20Oil/1_Oil_3.htm [3/20/2008 4:45:11 PM] State of Alaska, Oil and Gas Conservation Commission Production History for: Month Oil (BBL)Gas (MCF)Water (BBLDaysProd Wells Producing ENDICOTT, IVISHAK OIL Pool Jan 1958 Dec 2004 Jul 1989 4565 3116 312 1 Aug 1989 68290 42609 9231 1 Sep 1989 49087 32390 8826 1 Oct 1989 64776 42403 17531 1 Nov 1989 52278 35228 174428 1 Dec 1989 110050 80268 1924531 1 349046 236014 21375Year Total Jan 1990 106010 80563 2465831 1 Feb 1990 44296 36717 1315514 1 Mar 1990 95178 69353 3673931 1 Apr 1990 87080 69394 3982530 1 May 1990 89449 81066 4663331 1 Jun 1990 81028 80939 5103630 1 Jul 1990 99478 85831 4129331 1 Aug 1990 89710 72071 2466023 1 Sep 1990 113431 95091 3604430 1 Oct 1990 115642 146639 4408548 2 Nov 1990 238700 190676 4761270 3 Dec 1990 381558 408031 54432105 4 1541560 1416371 460172Year Total Jan 1991 332169 564513 54328121 4 Feb 1991 268628 354075 3419987 4 Mar 1991 234590 221163 2463693 3 Apr 1991 190245 177813 3916390 4 May 1991 173250 149088 7169193 3 Jun 1991 152855 144217 9462383 3 Jul 1991 169360 165236 13511690 3 Aug 1991 218041 159885 20429190 3 Sep 1991 175603 121793 20182090 3 Oct 1991 186581 128781 16053587 3 Nov 1991 150136 112297 17551683 3 Dec 1991 57124 47981 15419642 3 2308582 2346842 1350114Year Total Jan 1992 67934 57464 26780566 3 Feb 1992 80235 58208 23235475 3 Mar 1992 86143 65485 29281187 3 Apr 1992 75050 72743 23435280 3 May 1992 81657 55396 30627592 3 Jun 1992 99856 67127 24720890 3 Jul 1992 73928 33708 21622182 3 Aug 1992 70618 50190 29085186 3 Sep 1992 93342 62039 28194990 3 Oct 1992 111718 69943 27901792 3 Nov 1992 75506 50886 32681890 3 Dec 1992 85989 59712 35764693 3 1001976 702901 3333307Year Total 5/10/2005 Page 1 of 5 State of Alaska, Oil and Gas Conservation Commission Production History for: Month Oil (BBL)Gas (MCF)Water (BBLDaysProd Wells Producing ENDICOTT, IVISHAK OIL Pool Jan 1958 Dec 2004 Jan 1993 96834 64851 35619793 3 Feb 1993 74533 52055 30377078 3 Mar 1993 98396 82413 40200693 3 Apr 1993 80500 56298 18035959 3 May 1993 63983 42116 19850362 2 Jun 1993 58114 36688 18378660 2 Jul 1993 41417 29327 24527275 3 Aug 1993 41770 26152 21279971 3 Sep 1993 54773 38455 23207366 3 Oct 1993 64723 45377 39750193 3 Nov 1993 51757 33023 35375178 3 Dec 1993 33898 21746 32617460 3 760698 528501 3392191Year Total Jan 1994 61689 38643 33556482 3 Feb 1994 49460 30985 36727784 3 Mar 1994 20413 12805 27119071 3 Apr 1994 20666 12964 25852775 3 May 1994 30698 22986 34336393 3 Jun 1994 42745 27556 32911790 3 Jul 1994 31155 19556 24677274 3 Aug 1994 21686 13594 18220157 2 Sep 1994 23128 14493 19070355 3 Oct 1994 26280 16469 21477861 3 Nov 1994 10230 6411 7864430 2 Dec 1994 30222 42899 31794265 3 368372 259361 3136078Year Total Jan 1995 13838 10693 33595545 2 Feb 1995 4142 4731 17798021 2 Mar 1995 29253 19012 28672863 3 Apr 1995 20879 13120 29344962 3 May 1995 34998 21900 32081358 3 Jun 1995 28273 17931 25334275 3 Jul 1995 21015 13169 13223555 3 Aug 1995 22696 14210 22563379 3 Sep 1995 18490 11578 12872454 3 Oct 1995 11097 6986 19421372 3 Nov 1995 10419 6525 9230046 3 Dec 1995 19595 12267 19587964 3 234695 152122 2637251Year Total 5/10/2005 Page 2 of 5 State of Alaska, Oil and Gas Conservation Commission Production History for: Month Oil (BBL)Gas (MCF)Water (BBLDaysProd Wells Producing ENDICOTT, IVISHAK OIL Pool Jan 1958 Dec 2004 Jan 1996 20082 12579 21743564 3 Feb 1996 14503 9087 15356249 3 Mar 1996 10008 6270 5759339 2 Apr 1996 11273 7067 4903434 2 May 1996 12622 7909 5550838 3 Jun 1996 16733 10479 2267332 2 Jul 1996 5120 3207 1065216 1 Aug 1996 19232 12035 5532940 3 Sep 1996 36355 22790 17675262 3 Oct 1996 20216 3171 8279762 2 Nov 1996 21590 4037 7684162 3 Dec 1996 11544 0 3926354 2 199278 98631 997439Year Total Jan 1997 21664 11306 18035761 2 Feb 1997 21679 13565 15636756 2 Mar 1997 27828 17426 16460862 2 Apr 1997 19906 12460 18446960 2 May 1997 21397 13388 17306162 2 Jun 1997 21182 13267 16363960 2 Jul 1997 20866 13058 16552162 2 Aug 1997 20683 12947 15086262 2 Sep 1997 17433 10908 16211060 2 Oct 1997 18120 11340 17369762 2 Nov 1997 20270 12680 17691460 2 Dec 1997 24036 15055 19014962 2 255064 157400 2041754Year Total Jan 1998 18258 11427 19191862 2 Feb 1998 17056 10683 20016556 2 Mar 1998 14993 9379 17947160 2 Apr 1998 13706 8578 12760344 2 May 1998 15727 9843 15422753 2 Jun 1998 15627 11030 14976659 2 Jul 1998 15852 10253 15220462 2 Aug 1998 15497 9707 15392862 2 Sep 1998 16255 10183 13915058 2 Oct 1998 16988 10633 16892562 2 Nov 1998 16028 10046 16414760 2 Dec 1998 16782 10504 16941560 2 192769 122266 1950919Year Total 5/10/2005 Page 3 of 5 State of Alaska, Oil and Gas Conservation Commission Production History for: Month Oil (BBL)Gas (MCF)Water (BBLDaysProd Wells Producing ENDICOTT, IVISHAK OIL Pool Jan 1958 Dec 2004 Jan 1999 17700 11081 19932262 2 Feb 1999 19808 14253 16237456 2 Mar 1999 13838 11513 14686248 2 Apr 1999 9883 6289 13506234 2 May 1999 13519 8891 19033449 2 Jun 1999 15260 9696 18408257 2 Jul 1999 20973 13364 19889862 2 Aug 1999 15266 11040 12877552 2 Sep 1999 10685 6724 10961346 2 Oct 1999 10585 7091 14315853 2 Nov 1999 15477 9698 18906959 2 Dec 1999 16009 10055 19514857 2 179003 119695 1982697Year Total Jan 2000 12299 8534 18020057 2 Feb 2000 9413 5895 11976546 2 Mar 2000 11699 7346 22377062 2 Apr 2000 10154 6355 14907558 2 May 2000 14261 8935 21401862 2 Jun 2000 11743 7626 18768859 2 Jul 2000 14911 9473 22417862 2 Aug 2000 12973 8360 20028762 2 Sep 2000 14889 9300 17661360 2 Oct 2000 11413 7210 21534261 2 Nov 2000 10312 6623 20629360 2 Dec 2000 14235 9146 17466053 2 148302 94803 2271889Year Total Jan 2001 19111 15517 22109262 2 Feb 2001 8126 5122 16262850 2 Mar 2001 9663 6092 23395657 2 Apr 2001 13788 8670 23484260 2 May 2001 13139 8246 22954662 2 Jun 2001 4602 2990 7655236 2 Jul 2001 7571 5036 21294932 2 Aug 2001 9310 5895 17967928 2 Sep 2001 12639 7992 25644259 2 Oct 2001 10538 6693 21043454 2 Nov 2001 13818 8697 24459160 2 Dec 2001 19480 12282 24978862 2 141785 93232 2512499Year Total 5/10/2005 Page 4 of 5 State of Alaska, Oil and Gas Conservation Commission Production History for: Month Oil (BBL)Gas (MCF)Water (BBLDaysProd Wells Producing ENDICOTT, IVISHAK OIL Pool Jan 1958 Dec 2004 Jan 2002 15952 10045 24760862 2 Feb 2002 10978 7055 21727556 2 Mar 2002 13094 8205 24197061 2 Apr 2002 11373 8967 22551359 2 May 2002 11843 8270 22886161 2 Jun 2002 8993 5639 19661559 2 Jul 2002 9219 5772 19944655 2 Aug 2002 14608 10725 23827062 2 Sep 2002 15908 8044 23018160 2 Oct 2002 8885 5568 16343951 2 Nov 2002 7132 4867 12341344 2 Dec 2002 16894 12422 24995862 2 144879 95579 2562549Year Total Jan 2003 21637 16334 25174861 2 Feb 2003 8471 7473 22255437 2 Mar 2003 10959 6843 23247331 1 Apr 2003 7234 4539 21955530 1 May 2003 4197 2558 15659227 2 Jun 2003 4900 4740 5170330 2 Jul 2003 128 166 26532 1 Sep 2003 5503 3449 9694612 1 Oct 2003 14451 9050 20399031 1 Nov 2003 8329 5218 21960230 1 Dec 2003 5840 3656 20726529 1 91649 64026 1865081Year Total Jan 2004 6704 4222 19527327 1 Feb 2004 7705 4830 18501227 1 Mar 2004 784 543 150564 2 May 2004 823 518 2410118 1 Jun 2004 2687 1898 8638427 1 Jul 2004 503 903 4463319 1 Sep 2004 1935 1210 5623620 1 Oct 2004 6181 3862 6855531 1 Nov 2004 2925 1841 5410827 1 30247 19827 729358Year Total 7,947,905 6,507,571 31,244,673Pool Total 5/10/2005 Page 5 of 5 State of Alaska, Oil and Gas Conservation Commission Injection History for: Month Liquid (BBL)Gas (MCF)DaysInj Wells Injecting ENDICOTT, IVISHAK OIL Pool Mar 1991 257464 030 1 Apr 1991 266791 029 1 May 1991 196710 024 1 Jun 1991 92981 026 2 Jul 1991 241574 061 2 Aug 1991 282868 059 2 Sep 1991 269816 060 2 Oct 1991 322653 062 2 Nov 1991 301258 060 2 Dec 1991 456490 061 2 Year Total 2688605 0 Jan 1992 512503 062 2 Feb 1992 347951 058 2 Mar 1992 367243 062 2 Apr 1992 452135 060 2 May 1992 391916 062 2 Jun 1992 186178 060 2 Jul 1992 198128 060 2 Aug 1992 215655 062 2 Sep 1992 187714 060 2 Oct 1992 265661 062 2 Nov 1992 336493 060 2 Dec 1992 361443 062 2 Year Total 3823020 0 Jan 1993 437184 062 2 Feb 1993 374757 056 2 Mar 1993 365134 062 2 Apr 1993 320807 057 2 May 1993 277162 060 2 Jun 1993 198404 060 2 Jul 1993 177400 056 2 Aug 1993 190439 062 2 Sep 1993 209767 060 2 Oct 1993 202059 062 2 Nov 1993 210312 060 2 Dec 1993 234522 062 2 Year Total 3197947 0 Jan 1994 222142 062 2 Feb 1994 234783 056 2 Mar 1994 62467 015 2 Aug 1994 7293 022 Sep 1994 189731 060 2 Oct 1994 222759 062 2 Nov 1994 144826 056 2 Dec 1994 219349 062 2 Year Total 1303350 0 2/2/2005 Page 1 of 5 State of Alaska, Oil and Gas Conservation Commission Injection History for: Month Liquid (BBL)Gas (MCF)DaysInj Wells Injecting ENDICOTT, IVISHAK OIL Pool Jan 1995 184091 058 2 Feb 1995 163616 055 2 Mar 1995 166840 060 2 Apr 1995 138340 060 2 May 1995 58175 038 2 Jun 1995 3834 052 Jul 1995 60917 046 2 Aug 1995 128895 062 2 Sep 1995 91975 060 2 Oct 1995 89860 061 2 Nov 1995 195413 060 2 Dec 1995 221322 062 2 Year Total 1503278 0 Jan 1996 221416 062 2 Feb 1996 201057 058 2 Mar 1996 222868 062 2 Apr 1996 170074 058 2 May 1996 140346 062 2 Jun 1996 81706 060 2 Jul 1996 46778 034 2 Aug 1996 117409 062 2 Sep 1996 144761 060 2 Oct 1996 207188 062 2 Nov 1996 229166 060 2 Dec 1996 244579 062 2 Year Total 2027348 0 Jan 1997 258112 062 2 Feb 1997 202706 056 2 Mar 1997 302869 062 2 Apr 1997 281545 060 2 May 1997 242414 062 2 Jun 1997 166828 060 2 Jul 1997 284031 062 2 Aug 1997 287260 062 2 Sep 1997 298160 060 2 Oct 1997 353527 062 2 Nov 1997 380998 060 2 Dec 1997 387824 062 2 Year Total 3446274 0 2/2/2005 Page 2 of 5 State of Alaska, Oil and Gas Conservation Commission Injection History for: Month Liquid (BBL)Gas (MCF)DaysInj Wells Injecting ENDICOTT, IVISHAK OIL Pool Jan 1998 404529 062 2 Feb 1998 283296 056 2 Mar 1998 349351 062 2 Apr 1998 228871 060 2 May 1998 249627 062 2 Jun 1998 195084 058 2 Jul 1998 268944 062 2 Aug 1998 322106 062 2 Sep 1998 228940 060 2 Oct 1998 255823 062 2 Nov 1998 289116 060 2 Dec 1998 322338 062 2 Year Total 3398025 0 Jan 1999 367825 062 2 Feb 1999 286886 056 2 Mar 1999 168488 062 2 Apr 1999 208939 060 2 May 1999 287048 062 2 Jun 1999 296277 060 2 Jul 1999 259218 062 2 Aug 1999 214789 062 2 Sep 1999 206397 057 2 Oct 1999 228252 062 2 Nov 1999 276970 060 2 Dec 1999 267961 058 2 Year Total 3069050 0 Jan 2000 287877 058 2 Feb 2000 284884 058 2 Mar 2000 285137 059 2 Apr 2000 271681 058 2 May 2000 272072 062 2 Jun 2000 198444 060 2 Jul 2000 199546 062 2 Aug 2000 186834 062 2 Sep 2000 185070 060 2 Oct 2000 260418 062 2 Nov 2000 267337 060 2 Dec 2000 273321 062 2 Year Total 2972621 0 2/2/2005 Page 3 of 5 State of Alaska, Oil and Gas Conservation Commission Injection History for: Month Liquid (BBL)Gas (MCF)DaysInj Wells Injecting ENDICOTT, IVISHAK OIL Pool Jan 2001 321566 062 2 Feb 2001 294921 056 2 Mar 2001 297630 062 2 Apr 2001 317832 060 2 May 2001 310668 062 2 Jun 2001 319758 060 2 Jul 2001 299992 062 2 Aug 2001 291717 062 2 Sep 2001 240829 059 2 Oct 2001 255018 061 2 Nov 2001 275412 060 2 Dec 2001 314394 062 2 Year Total 3539737 0 Jan 2002 312255 062 2 Feb 2002 306015 056 2 Mar 2002 316311 062 2 Apr 2002 283159 060 2 May 2002 286907 062 2 Jun 2002 260270 060 2 Jul 2002 232541 060 2 Aug 2002 279945 062 2 Sep 2002 254243 060 2 Oct 2002 200115 060 2 Nov 2002 263621 060 2 Dec 2002 320925 062 2 Year Total 3316307 0 Jan 2003 327777 062 2 Feb 2003 269449 056 2 Mar 2003 289992 062 2 Apr 2003 292600 060 2 May 2003 269755 062 2 Jun 2003 283502 060 2 Jul 2003 231505 062 2 Aug 2003 225736 062 2 Sep 2003 208809 060 2 Oct 2003 280443 062 2 Nov 2003 346455 060 2 Dec 2003 330726 062 2 Year Total 3356749 0 2/2/2005 Page 4 of 5 State of Alaska, Oil and Gas Conservation Commission Injection History for: Month Liquid (BBL)Gas (MCF)DaysInj Wells Injecting ENDICOTT, IVISHAK OIL Pool Jan 2004 333497 062 2 Feb 2004 308065 058 2 Mar 2004 361610 062 2 Apr 2004 305364 060 2 May 2004 245209 062 2 Jun 2004 249431 060 2 Jul 2004 235360 062 2 Aug 2004 127481 030 2 Sep 2004 199870 053 2 Oct 2004 290108 062 2 Nov 2004 272522 060 2 Dec 2004 283144 060 2 Year Total 3211661 0 Pool Total 40,853,972 0 2/2/2005 Page 5 of 5 State of Alaska, Oil and Gas Conservation Commission Injection History for: Month Liquid (BBL)Gas (MCF)DaysInj Wells Injecting ENDICOTT, UNDEFINED WDSP Pool Jul 1986 2702 011 Aug 1986 3499 010 1 Sep 1986 717 031 Oct 1986 13792 016 1 Nov 1986 7865 015 1 Dec 1986 15402 027 1 Year Total 43977 0 Jan 1987 11627 023 1 Feb 1987 5392 010 1 Mar 1987 12077 031 1 Apr 1987 19449 027 1 May 1987 18525 025 1 Jun 1987 25066 027 1 Jul 1987 14746 025 1 Aug 1987 6303 015 1 Sep 1987 8866 028 1 Oct 1987 9788 022 1 Nov 1987 19678 023 1 Dec 1987 127197 031 2 Year Total 278714 0 Jan 1988 165867 031 2 Feb 1988 195697 029 1 Mar 1988 156793 031 1 Apr 1988 165015 030 1 May 1988 184001 040 2 Jun 1988 143207 030 1 Jul 1988 176929 031 1 Aug 1988 200057 031 1 Sep 1988 221270 030 1 Oct 1988 294594 031 1 Nov 1988 289175 030 1 Dec 1988 378003 031 1 Year Total 2570608 0 Jan 1989 51431 031 1 Feb 1989 54733 028 1 Mar 1989 363028 031 1 Apr 1989 233709 030 1 May 1989 34631 031 1 Jun 1989 25331 030 1 Jul 1989 46021 030 1 Aug 1989 38429 031 1 Sep 1989 123288 027 1 Oct 1989 19952 028 1 Nov 1989 18747 025 1 Dec 1989 58729 029 1 Year Total 1068029 0 4/30/2005 Page 1 of 5 State of Alaska, Oil and Gas Conservation Commission Injection History for: Month Liquid (BBL)Gas (MCF)DaysInj Wells Injecting ENDICOTT, UNDEFINED WDSP Pool Jan 1990 19163 024 1 Feb 1990 150904 028 1 Mar 1990 68399 031 1 Apr 1990 21297 028 1 May 1990 18205 028 1 Jun 1990 17933 029 1 Jul 1990 24074 031 1 Aug 1990 33559 031 1 Sep 1990 49825 030 1 Oct 1990 41611 029 1 Nov 1990 39229 027 1 Dec 1990 79157 031 1 Year Total 563356 0 Jan 1991 35863 030 1 Feb 1991 27274 025 1 Mar 1991 7989 081 May 1991 2154 051 Jun 1991 38663 027 1 Jul 1991 25708 019 1 Aug 1991 5534 013 1 Sep 1991 9114 020 1 Oct 1991 4501 013 1 Nov 1991 3411 010 1 Dec 1991 13781 014 1 Year Total 173992 0 Jan 1992 29032 026 1 Feb 1992 21755 022 1 Mar 1992 30921 020 1 Apr 1992 15262 021 1 May 1992 20182 019 1 Jun 1992 9825 016 1 Jul 1992 18283 018 1 Aug 1992 14955 025 1 Sep 1992 14561 017 1 Oct 1992 6049 017 1 Nov 1992 20182 029 1 Dec 1992 32464 031 1 Year Total 233471 0 4/30/2005 Page 2 of 5 State of Alaska, Oil and Gas Conservation Commission Injection History for: Month Liquid (BBL)Gas (MCF)DaysInj Wells Injecting ENDICOTT, UNDEFINED WDSP Pool Jan 1993 57417 031 1 Feb 1993 42144 028 1 Mar 1993 46891 031 1 Apr 1993 45152 030 1 May 1993 41102 030 1 Jun 1993 38501 030 1 Jul 1993 41806 030 1 Aug 1993 26126 027 1 Sep 1993 49614 030 1 Oct 1993 58673 031 1 Nov 1993 45971 030 1 Dec 1993 55334 031 1 Year Total 548731 0 Jan 1994 60781 031 1 Feb 1994 68417 028 1 Mar 1994 15163 018 1 Apr 1994 2995 016 1 May 1994 5575 021 1 Jun 1994 10565 023 1 Jul 1994 5063 016 1 Aug 1994 14647 024 1 Sep 1994 9000 016 1 Oct 1994 5206 014 1 Nov 1994 3425 013 1 Dec 1994 1761 091 Year Total 202598 0 Jan 1995 5324 015 1 Feb 1995 10741 022 1 Mar 1995 4400 016 1 Apr 1995 9013 020 1 May 1995 10637 016 1 Jun 1995 5948 012 1 Jul 1995 3250 041 Aug 1995 3200 012 1 Sep 1995 2057 071 Oct 1995 15275 031 1 Nov 1995 11904 022 1 Dec 1995 3825 014 1 Year Total 85574 0 4/30/2005 Page 3 of 5 State of Alaska, Oil and Gas Conservation Commission Injection History for: Month Liquid (BBL)Gas (MCF)DaysInj Wells Injecting ENDICOTT, UNDEFINED WDSP Pool Jan 1996 9825 014 1 Feb 1996 4576 081 Mar 1996 7102 017 1 Apr 1996 4429 012 1 May 1996 1783 051 Jun 1996 6525 091 Jul 1996 9064 012 1 Aug 1996 6086 061 Sep 1996 3277 081 Oct 1996 889 021 Nov 1996 447 021 Dec 1996 1961 071 Year Total 55964 0 Jan 1997 389 011 Feb 1997 1279 021 Mar 1997 1186 061 Apr 1997 3968 061 May 1997 1984 061 Jun 1997 4619 061 Jul 1997 3046 071 Aug 1997 4744 021 Sep 1997 1106 031 Oct 1997 769 051 Nov 1997 786 031 Dec 1997 196 011 Year Total 24072 0 Jan 1998 1117 031 1 Mar 1998 2207 031 Apr 1998 1300 031 May 1998 260 021 Jul 1998 458 011 Aug 1998 508 021 Sep 1998 1799 011 Nov 1998 263 021 Dec 1998 2042 071 Year Total 9954 0 Jan 1999 380 021 Mar 1999 631 021 Sep 1999 5864 051 Oct 1999 105 011 Dec 1999 3704 041 Year Total 10684 0 Jan 2000 87 011 Oct 2000 23 011 Year Total 110 0 4/30/2005 Page 4 of 5 State of Alaska, Oil and Gas Conservation Commission Injection History for: Month Liquid (BBL)Gas (MCF)DaysInj Wells Injecting ENDICOTT, UNDEFINED WDSP Pool Apr 2001 200 011 May 2001 3514 041 Year Total 3714 0 Jan 2003 325 011 Year Total 325 0 Jul 2004 195 021 Aug 2004 2232 041 Year Total 2427 0 Pool Total 5,876,300 0 4/30/2005 Page 5 of 5 Deadhorse Harrison Bay Dalton HwyTrans-AlaskaPipelineNuiqsut NPRA B e a u f o r t S e a North Slope, Alaska Endicott, Ivishak Oil Pool Modified from AK DNR Div. Oil & Gas 2005 NORTHSTAR UNIT DUCK ISLAND UNITCOLVILLE RIVER UNIT MILNE POINT UNIT KUPARUK RIVER UNIT PRUDHOE BAY UNIT OOOGURUK UNIT TUVAAQ UNIT NIKAITCHUQ UNIT Reference List ENDICOTT, IVISHAK OIL Alaska Oil and Gas Conservation Commission, 1991, Conservation Order No. 275, available online at: http://www.state.ak.us/local/akpages/ADMIN/ogc/orders/co/co250_299/co299.htm Alaska Oil and Gas Conservation Commission, 1991, Conservation Order No. 275, Endicott Field, Ivishak Oil Pool; http://www.state.ak.us/local/akpages/ADMIN/ogc/orders/co/co250_299/co275.htm Alaska Oil and Gas Conservation Commission, 2005, Production Database Johnson, S., 1991, Alaska Oil and Gas Conservation Commission, Conservation Order No.275 file, Public Hearing Transcript of Proceedings, March 12, 1991. Wicks, J.L., Buckingham, M.L. and Dupree, J.H., 1991, Endicott Field, Northern Alaska, Offshore Beaufort Sea, in Atlas of Oil and Gas Fields (Preprint) 9/12/2005 Page 1 of 1 Endicott, Ivishak Oil Pool Summary The Ivishak Oil Pool of the Endicott Field (“EIOP”) lies beneath the Beaufort Sea and within the Duck Island Unit, about 8 miles east of Prudhoe Bay Unit (“PBU“). The Sag Delta No. 9 exploratory discovered this pool in 1982 well. This pool is the accumulation of hydrocarbons that is common to, and correlates with, Sag Delta No. 9 between the measured depths of 12,069’ and 12,314’. The EIOP has been developed from the Main Production artificial island that is located approximately 4 miles offshore in 2 to 14 feet of water.1 The pool has been producing continuously since July 1989. During the peak production years from November 1990 and November 1991, EIOP production ranged from 12,308 to 5,005 barrels of oil per day (“BOPD”), and averaged about 7,270 BOPD. Between December 1991 and June 1993, production dropped to an average of 2,650 BOPD. Since July 1993, production has slowly declined. During 2004, the EIOP averaged 83 BOPD from two production wells.2 Geology The pool encompasses reservoirs assigned to the Triassic-aged Ivishak Formation, which is a member of the Sadlerochit Group. This formation was deposited in a marine shoreface environment.3 The pool is bounded to the south by a major fault and there appears to be numerous smaller faults within the accumulations. The pool encompasses an area of approximately 380 acres, and it appears to be separate from other, nearby accumulations based on pressure measurements and oil gravity. The base of the Ivishak oil column appears to be planar, and is underlain by a tar mat, which separates the oil from the underlying aquifer. No gas cap has been observed. Oil gravity averages 25° API within the pool. The temperature is 212°F at 10,000 feet true vertical depth. Original oil in place is estimated to be approximately 14 million stock tank barrels (STB).4 1 Alaska Oil and Gas Conservation Commission, 1991, Conservation Order No.275, available online at: http://www.aogcc.alaska.gov/orders/co/co001_299/co275.htm 2 Alaska Oil and Gas Conservation Commission, 2005, Production Database 3 Johnson, S., 1991, Alaska Oil and Gas Conservation Commission, Conservation Order No.275 file, Public Hearing Transcript of Proceedings, March 12, 1991, p. 11. 4 Alaska Oil and Gas Conservation Commission, 1991, Conservation Order No.275, available online at: http://www.aogcc.alaska.gov/orders/co/co001_299/co275.htm AAOrder No.DateOperator Description Current ENDICOTT FIELD IVISHAK OIL POOL Current Orders 548 0CO 11-Feb-05 Adoption of rules regulating the use of multiphase meters for well testing and allocation of production. Y 501 0CO 16-Oct-03BP EXPLORATI Rules regulating sustained casing pressures in development wells within the Endicott Field. Y 275 0CO 24-Apr-91BP Pool rules for development of the Ivishak & Alapah oil pools in the Duck Island Unit of the Endicott Field. Amended by CO 501. Y Endicott, Ivishak 0.01.02.03.04.05.0Producing Oil WellsENDICOTT FIELD, IVISHAK OIL POOL020406080100Water Cut ( % )ENDICOTT FIELD, IVISHAK OIL POOL0.10.5151050100Cum Oil Prod ( MMbbl )Cum Water Prod ( MMbbl )Cum Gas Prod ( MMMcf )ENDICOTT FIELD, IVISHAK OIL POOL1989 90 91 92 93 94 95 96 97 98 99 2000 01 02 03 040.010.050.10.5151050100Oil Rate (CD) ( Mbbl/d )Water Rate (CD) ( Mbbl/d )Gas Rate (CD) ( MMcf/d )Gas / Oil Ratio ( Mcf/bbl )ENDICOTT FIELD, IVISHAK OIL POOL 1989 90 91 92 93 94 95 96 97 98 99 2000 01 02 03 040.010.11101001000NGL Rate (CD) ( bbl/d )ENDICOTT FIELD, IVISHAK OIL POOL - NGL PRODUCTION 0.01.02.03.04.05.0Wells on Gas InjectionWells on Water InjectionENDICOTT FIELD, IVISHAK OIL POOL - EOR INJECTION151050100Cum Gas Inj ( MMMcf )Cum Water Inj ( MMbbl )ENDICOTT FIELD, IVISHAK OIL POOL - EOR INJECTION1991 92 93 94 95 96 97 98 99 2000 01 02 03 04151050100Gas Inj Rate (CD) ( MMcf/d )Water Inj Rate (CD) ( Mbbl/d )ENDICOTT FIELD, IVISHAK OIL POOL - EOR INJECTION 0.01.02.0Disposal WellsENDICOTT FIELD, UNDEFINED WASTE DISPOSAL POOL0.10.51510Cum Water Disp ( MMbbl )ENDICOTT FIELD, UNDEFINED WASTE DISPOSAL POOL1986 87 88 89 90 91 92 93 94 95 96 97 98 99 2000 01 02 03 0410-1100101102103104105Waste Disposal Rate ( bbl/d )ENDICOTT FIELD, UNDEFINED WASTE DISPOSAL POOL