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Home My WebLink About1989 Endicott Oil PoolENDICOTT OIL POOL WATERFLOOD SURVEILLANCE REPORT DECEMBER 1989 Project Status Summary` This report covers the period from the start of water injection on February 29, 1988 through December 31, 1989 for the Endicott Oil Pool. During the report period water injection occurred in thirteen wells, ten previously reported wells and three new wells. Exhibit 1 shows a map of the field with the year end well status including the existing water injectors, gas injectors, oil producers and pending water injectors. Cumulative Endicott production since start-up is 82.0 MMSTB of oil, 83.7 BSCF of gas, and 9.3 MMB of water. Cumulative water injection into Endicott through December 1989 is 28.0 MMB sea water and 5.5 MMB produced water for a total of 33.5 MMB as detailed in Exhibit 2. The cumulative injected and produced reservoir volumes since start-up are shown in Exhibit 3. As of December 31, 1989 reservoir voidage had exceeded gas and water injection by 57.9 MMRB. Injection Wei I Performance An overview of waterflood performance is shown in Exhibit 4. Total injection volumes, the target injection rates, injectivity index and well start-up dates through December 1989 are shown. Exhibit 5 provides graphs of the injection rates, injectivity index and wellhead pressure versus time for twelve of the thirteen water injection wells. Below is a detailed activity summary for the three injection wells not discussed in previous reports. Well 2-70/U-15 was the first water injector commissioned solely for the development of the 3B/3C sand intervals in the MPI area. The well was pre - produced to clean-up the perforations prior to injection. The well has injected at 10 to 12 MB/D of water with wellhead pressure of about 1700 psi for the last 4 months of the year. The second 3B/3C water injector commissioned in 1989 was well 4-14/R-34. It is located in the southern SDI area. Well 4-14/R-34 was pre -produced to cleanup the perforations and gather reservoir performance data. Injection start-up was at 7 MB/D and has increased to 18 MB/D at 1800 psi wellhead pressure. Well 2-34/P-14 was the third water injector commissioned since July 1989. I was previously used as an oil producer from October 1987 to September 1989. The well produced 3.4 MMSTB of oil. Well 2-34/P-14 injected 12 MB of water in November 1989 as part of reservoir testing. Well 2-34/P-14 is the final Phase 1 water injection well in the MPI area. Water Iniection Performanc Pressure surveys taken as part of the reservoir surveillance program continue to verify the restricted pressure communication across the mid -field fault system. The observed pressures in the SDI region continue to be 100 to 200 psi lower than those observed in the MPI region. Implementation of water injection in the SDI area has mitigated the pressure decline in subzones 2A, 2B and 3A. Refer to Exhibit 6 for the bottomhole pressure data and plots since field start-up. Water Injection into the MPI 3B/3C intervals during the second half of 1989 have generally increased the pressure by 30 to 50 psia. Produced Water Sampling Program To monitor the movement of water through the oil column, produced water samples are analyzed for injected tracers and naturally occurring ion concentrations. Injected Tracer Program Eleven water injectors listed below were traced to monitor the movement of the injected water. Three of the wells were traced in July 1988 and the remaining wells were traced in October 1989. The program is designed to distinguish the source of injected water and the waterflood sweep efficiency. WELLNAME ZONE TRACER QUANTITIES DATE 1-37/P-24 2B Cobalt -60 320 mCi July 19, 1988 2-16/M-16 2B/2A Carbon-14 400 mCi Oct. 4, 1989 2-22/L-14 3A Cobalt -60 220 mCi Oct. 5, 1989 2-44/R-12 3A &C/2B Tritium 50 Ci Oct. 4, 1989 2-70/U-15 3B/3C Cobalt -60 200 mCi Oct. 5, 1989 3-07/N-28 2A Cobalt -57 320 mCi Oct. 6, 1989 3-41/K-39 2B/2A Tritium 45 Ci Oct. 3, 1989 3-45/M-39 3A/2B Cobalt -60 430 mCi Oct.6, 1989 4-02/0-28 3A/2B Carbon-14 100 mCi July 19, 1988 4-14/R-34 3B/3C Carbon-14 100 mCi Oct. 3, 1989 5-02/SD-10 2A Tritium 50 Ci July 19, 1988 To date, injected tracer has been detected in five oil producers from two water injectors traced in 1988. Wells 3-05/0-29 and 3-23 /N-32 had tracer breakthrough in October 1988 from water injector 4-02/Q-28. Well 4-08/P-27 had tracer breakthrough in June 1989 also from well 4-02/0-28. Wells 1-41/0-23 and 1-35/0-25 are the first MPI oil producers to have tracer breakthrough. The source of the MPI tracer is water injector 1-37/P-24. Refer to Exhibit 7 for a status of the program. Naturally Occurring Ion Program Produced water from high watercut wells, wells with increasing water cuts, and injected sea water samples are currently analyzed on a monthly basis for magnesium (Mg) and sulfate (SO4) ion concentrations. The basis of the technique is the contrast between the Mg and SO4 ion concentrations in the sea water and insitu waters. The analysis allows for the qualitative indication of sea water breakthrough. Several wells have been analyzed for the M9 and SO4 ion concentrations to date. Exhibit 8 provides a graphical result of the data. The data in the lower left area represents the insitu water and the sea water during summer runoff. The data points in the upper right represent the normal sea water after freeze- up. This technique is limited by the varying sea water characteristic and reinjection of insitu water. Sea water breakthrough has been identified in wells 1-41/0-23, 4-50/K-41 and 3-23/N-32. The results from wells 1-41/0-23 and 3-23/N-32 were supported by the detection of injected tracer. Sea Water Quality Testing of the Endicott sea water injection facility was first performed during the open water season in the summer of 1988. Results of testing indicated that 13.9 MMB at an average of 116 MB/D of water could be injected during the open water season based on the 1988 summer conditions. During the summer of 1989, the injected sea water was 5.5 MMB at 46.2 MB/D. One factor that attributed to the lower rates was the unusually high number and severity of summer storms. These storms directly effect the silt content of the sea water. Also organic hair-like fibers were detected in 1989 but were not seen during testing in 1988. These fibers reduced the filters silt handling capabilities. To maximize sea water injection, modifications are planned to improve system performances during the open water season. In addition, higher than anticipated volumes are being injected during the winter months. Future Waterflood Plans There are thirteen water injectors in the field with injection capacity over 200 MB/D . Plans are to add three to four water injectors by year end 1990 to complete Phase 1 injection and continue the water injection program for subzones 3B and 3C. The waterflood surveillance program will be used to evaluate the reservoir performance and determine the need of Phase II Waterflood Development wells. EXHIBIT 2 ENDICOTT OIL POOL SUMMARY OF PERTINENT DATA (as of December 31, 1989) Water Injection Start-up: February 29, 1988 Endicott Production since Field Start -Up: Oil (MMSTB) 82.0 Gas (BSCF) 83.7 Water (MMB) 9.3 Endicott Injection since Field Start -Up: Gas (BSCF) 66.0 Water (MMB) 33.5 ' Wells in Operation: Oil Producers 47 Gas Injectors 3 Water Injectors 13 Produced Water Disposal 1 " Drilled (not in service) 2 Total 66 ' Water injection volumes do not include Cretaceous injection Cretaceous injector not shown in Exhibit 1 Note: Water injection volumes do not include Cretaceous injection EXHIBIT 3 ENDICOTT OIL POOL RESERVOIR BALANCE FOR WATERFLOOD SANDS EFFECTIVE PRODUCTION SINCE FIELD START-UP from October 1987 through December 1989 (Values in MMRB) MPI REGION by SUBZONE Produced Volumes IQ 3B2A B 2A I Total Oil 4.39 3.20 12.04 18.77 28.32 66.72 Free Gas 1.37 2.39 2.98 4.04 1.40 12.19 Water 4.34 0.02 lu 1.20 0.66 34 Total 6.10 5.61 15.88 24.01 30.39 81.99 Iniected Volumes Gas 0.00 0.00 10.22 11.49 21.19 42.90 Water 4.64 0.58 3.22 4.84 5.77 15.01 Total 0.60 0.58 13.44 16.32 26.96 57.91 Net Voidaee Volumes Total 5.50 5.03 2.44 7.69 3.43 24.08 SDI REGION by SUBZONE Produced Volumes 3f 38 i 2B 2A SDI Total Oil 7.17 2.35 7.77 18.29 8.35 43.93 Free Gas 0.95 1.18 0.12 0.00 0.00 2.25 Water 4.08 0.10 0.49 4 3I 1.16 6.16 Total 8.20 3.63 8.38 22.62 9.51 52.35 Iniected Volumes 0.00 0.00 0.00 0.00 0.00 0.00 Gas Water 4.74 0.19 7.16 3.94 lA 5454 Total 0.70 0.19 6.56 7.16 3.94 18.54 Net Voidaee Volumes Total 7.51 3.45 1.82 15.46 5.57 33.81 FIELD TOTALS by SUBZONE Produced Volumes 3C M 3A 2B �A Field Total Oil 11.56 5.55 19.82 37.06 36.67 110.65 Free Gas 2.32 3.58 3.10 4.04 1.40 14.44 Water 4.42 0.12 1.35 5.53 1.83 9.25 Total 14.30 9.25 24.26 46.63 39.90 134.34 Injected Volumes Gas 0.00 0.00 10.22 11.49 21.19 42.90 Water 130 0.77 278 12.00 9.71 33-.51 Total 1.30 0.77 20.00 23.48 30.90 76.45 Net Voidaee Volumes Total 13.00 8.48 4.26 23.14 9.00 57.89 Note: Water injection volumes do not include Cretaceous injection EXHIBIT 4 ENDICOTT OIL POOL WATERFLOOD PERFORMANCE OVERVIEW Injection Well Data (through December 31, 1989) SDI Reservoir Area 1-43/P-26 TARGET INJECTIVITY CUMULATIVE April 1989 WELL RATE INDEX INJECTION START-UP NAME (MBW/D) (BPD/PSI) (MMBW) DATE MPI Reservoir Area 8 3.13 October 1988 1-37/P-24' 8.0 10 3.32 April 1988 2-16/M-16 15.0 30 2.48 March 1989 2-22/L-14' 10.0 10 0.91 May 19 1989 2-34/P-14' 10.0 10 0.01 November 1989 2-44/R-12** 18.0 20 2.59 April 1989 2-70/U-15 12.0 10 0.90 July 1989 5-02/SD-10"' 12.0 15 4.80 February 1988 SDI Reservoir Area 1-43/P-26 10.0 50 3.23 April 1989 3-07/N-28 20.0 70 2.56 April 1989 3-41 /K-39 30.0 50 3.64 May 1989 3-45/M-39' 12.0 8 3.13 October 1988 4-02/Q-28' 20.0 40 5.05 May 1988 4-14/R-34 18.0 10 0.93 September 1989 Total Injection 195.0 33.55 Seawater 165.0 28.03 Produced Water 30.0 5.52 Note: Water injection volumes do not include Cretaceous injection Wells had both produced and seawater injection �' Dedicated produced water injectors EXHIBIT 5 ENDICOTT PHASE 1 WATER INJECTION WELLS INJECTION RATE, WELLHEAD PRESSURE & INJECTIIVITY INDEX VERSUS INJECTION TIME ( START-UP THROUGH DECEMBER 31, 1989 ) STATE REPORT Injection Rate / Avg Whp / Inj Index WELL 1-37/P-24 01/01/88 -- 12/31/89 0 N N CLC C a m v G X - W _ I ! z� 0 0 e 0 �o N H CL a x �o 0 Q � 0 0 e 0 0 0 e pe a_ m W � O 0 � O 2 _ O W Z fl 1( Q I N J F M A M J J A S O N D J F M A M J J A S 0 N D Q -4 1988 1989 00 Z0 Ised Water blue /// lProd Water(are en \\\ MI Gas red XXX Dr Gae ur le a>sar �w STATE REPORT Injection Rate / Avg Whp / Inj Index WELL 1-43/P-26 01/01/88 -- 12/31/89 0 0 N ae � m v W O � f Z z o N O 0 0 0 M O _ O C N V 0- x 3 r 0 Q � 0 0 0 0 0 0 0 d � m k,j, Oi�kN N o UJ 19JH$ f M A M J J A S O N D IB 89 f M A M J J A S 0 N D Q O Q Za 189a Water blue /// Prod Wat IMI Gas red X lDry Gas (purple rae �c �w _ STATE REPORT Injection Rate / Avg Whp / Inj Index WELL 2-16/M-16 01/01/88 -- 12/31/88 0 m C o [n b a 0 a m X' w In l Z N O op O O O O O (7 M (n d o = o 3N � 1 Q O O O O O O O M O am mo o wo � N (r Z _ O O rr c W � Q o Z 3 N W J F M A M J J A S 0 N D J f M A M J, J A S 0 N D Q c 1988 1989 O O Z Z Sea Wate/ blue /// Prod Water re en \\�) MI Gas red XXX Dry Gag (purple eta �w STATE REPORT Injection Rate / Avg Whp / Inj Index WELL 2-22/L-14 01/01/88 -- 12/31/89 0 V7 � ILN D d m 0 X '- W Z ZN O � O O O M O (n N a a x 3 00 Qo c 0 0 0 0 N �O n� m W ti 0 � e 2- O W Q O Z 30 Q 1 N J F 1 M A M J J A S 0 Q d 1988 N D J F M A M J J A 1989 S 0 N D, C p Z ZpQ see Water blue 1// Prod Water Leen \\1 MI Gas -(r XXX Dr Gas (purple � W STATE REPORT Injection Rate / Avg Whp / Inj Index WELL 2-44/R-12 01/01/88 -- 12/31/89 0 M N a C � a m J X IW Z O Z O O O O M O _ O ( ry a I a x Q> o I 0 P O P��o a� W K O II O 'Y O Z y QO I 3a Z 4 04 04 �I 1 I N o QN J F M A M J J A 5 0 N D J f M A M J J A S 0 N D 1988 1989 _ O O Zp Sea Waterblue /// Prod Water ( teen \\1 MI Gas red XXX [)ry Ges (purple NaA �w J M a 0 STATE REPORT Injection Rate / Avg Whp / Inj Index WELL 2-70/U-15 01/01/88 -- 12/31/89 O J F M A M J J A 5 0 N 1988 D J F 1989 See Water blue /// 1prod Water (are IMI Gas red XXX Dr Gas (purple aaR STATE REPORT Injection Rate / Avg Whp / Inj Index WELL 3-07/N-28 01/01/88 -- 12/31/89 o IUU IIIl1W9JUI I Lll 0 J F M A M J J $ 0 N U J F M 4 M J J A S 0 N U 1988 1969 See Weter blue /// Prod Water reen \\\ MI Gas red XXX Dry Gae (purple �Rd Ln ti W M QQ 0-0 CC W N CL 0 a m x w z z z z STATE REPORT Injection Rate / Avg Whp / Inj Index WELL 3-41/K-39 0 01/01/88 -- 12/31/89 a J r M P M J J A 5 U H D J F M A M J J A 5 0 N D 1988 1989 Sea Water (blue ///) lProd Water(green \\\ MI Gas red XXX Dr Gas(purple xne STATE REPORT Injection Rate / Avg Whp / Inj Index WELL 3-45/M-39 01/01188 -- 12/31189 0 N N cn ^ a C a m x' w z z 0 0 0 0 C 0 CL D CL o 3 N I C > Q o 0 0 0 0 e a� 0 moo 00 a� I �o O u � 3N � li III I CV o e S 0 N C J F M A M J J A S 0 F! D J f M A M J J 1989 r � 1988 Q C za Sea Water Dlue /// Prod Water reen \\\ MI Gas red XXX Dr Gas ur le eaa =)c rt w STATE REPORT Injection Rate / Avg Whp / Inj Index WELL 4-02/Q-28 0141/88 -- 12/31/89 0 N c� a m x w a 0 0 0 M O � O D. N _ 3: 1 i � O Q o a 0 O O O M O-a m o Wo r N a � o O � o w 0 61 Q o Z 3 a I N o N J f M A M J J A S 0 N D J F M A M J J A S 0 N D Q1988 1989 00 ZQ See Water blue //! Prod Water rs \\\ MI Gas red XXX Dry Gas ( urple kRA) 7 � �w STATE REPORT Injection Rate / Avg Whp / Inj Index WELL 4-14/R-34 01/01/88 -- 12/31/88 0 n Ln a Q N a m X 0 Zo 2 0 a a 0 M O _ O � N 0. EL x 3 � o > o Q 0 a 0 0 0 M n CL ao M o 0 W � � N Q Z G G W 01 Q o Z 3 Q I N N o J F M A M J J A S 0 N D J F M A M J J A S 0 N D QQ 1988 logg 00 Zp Sea Water (blue ///) Prod Water (Breen \\\) MI Gas red XXX Dr Gas (purple naa zw STATE REPORT Injection Rate / Avg Whp / Inj Index WELL 5-02/SG10 01/01/88 -- 12/31/89 0 CL C m Z Z Z O O O M U^. O O C O CL N d 30 1 cv o a—' 0 a e 0 a 0 a a e a� m W o f � o Z - C Z 3 O V �r N a __! i J F M A M J J A S 0 N Df J F M A M J J A S 0 N D Q v 1988 1989 p C Z ZC 3ea Water blue /// Prod Water re JMf Gas (red XXX) Dr Gas (purple 9 #) �w EXHIBIT 6 ENDICOTT WATER INJECTION WELLS BOTTOM HOLE PRESSURE REPORTS 1.3 BOTTOM HOLE PRESSURE PLOTS ( START-UP THROUGH DECEMBER 31, 1989 ) ,a�fritlf&t�'3 BP Exploration PRODUCTION DATABASE WELL OPERATIONS REPORT API # ------------ Well Name ---------- Run Date --------- ------------------------------ Operation --------------------- DATUM 500292158500 2-04/M-19 12 -JUN -88 PRESSURE STATIC 4751 AT DATUM 09 -FEB -89 PRESSURE 03 -JAN -89 PRESSURE STATIC 4673 AT DA'rUM 29 -JUN -88 PRESSURE 13 -JUN -89 PRESSURE STATIC 4632 AND 217 AT DATUM 500292169900 2-06/J-22 30 -MAR -88 PRESSURE STATIC 4849 @ datum 500292177100 2-08/K-16 06 -MAR -88 PRESSURE STATIC 4789 AT DATUM 21 -FEB -89 PRESSURE 20 -OCT -88 PRESSURE STATIC 4531 @ DATUM 27 -APR -89 PRESSURE 12 -DEC -88 PRESSURE STATIC 4490 AT DATUM 500292163900 2-14/0-16 16 -OCT -88 PRESSURE STATIC 4678 AT DATUM PRESSURE 13 -MAY -89 PRESSURE STATIC DUAL ZONE STATIC SURV 500292188500 2-16/M-16 09 -FEB -89 PRESSURE STATIC 4626 AT DATUM 500292181500 2-26/N-14 29 -JUN -88 PRESSURE STATIC 4837 AT DATUM DATUM 29-JUL-88 PRESSURE STATIC 3718 AT DATUM DATUM 08 -OCT -88 PRESSURE STATIC 3320 AT DATUM DATUM 21 -FEB -89 PRESSURE STATIC 2894 AT DATUM datum 27 -APR -89 PRESSURE STATIC 3286 AT DATUM 500292184700 2-28/P-19 27 -SEP -88 PRESSURE STATIC 4695 AT DATUM PRESSURE 07 -DEC -88 PRESSURE STATIC 4603 AT DATUM STATIC 16 -AUG -89 PRESSURE STATIC 4565 AT DATUM 500292166200 2-34/P-14 14 -APR -88 PRESSURE STATIC 4486 @ DATUM 500292189200 2-42/P-13 09 -FEB -89 PRESSURE STATIC 4731 AT DATUM 500292176700 2-44/R-12 27 -FEB -88 PRESSURE STATIC 4802 AT DATUM 28 -MAR -88 PRESSURE STATIC 4502 @ datum 11 -SEP -88 PRESSURE STATIC 4482 @ DATUM 16 -OCT -88 PRESSURE STATIC 4783 AT DATUM 500292192100 2-46/Q-15 22 -JUN -89 PRESSURE STATIC 4420 AT DATUM 04 -AUG -89 PRESSURE STATIC 4427 AT DATUM 22 -DEC -89 PRESSURE STATIC 4456 AT DATUM 500292175000 2-52/S-14 25 -OCT -87 PRESSURE STATIC 4900 AT DATUM 27 -JAN -88 PRESSURE STATIC 4784 AT DATUM 03 -AUG -89 PRESSURE STATIC 4456 AT DATUM 25-NOV-89 PRESSURE STATIC 4506 AT DATUM 500292164800 2-62/Q-17 05 -FEB -88 PRESSURE STATIC 4737 AT DATUM 13 -JUN -88 PRESSURE STATIC 4673 AT DATUM 27 -SEP -89 PRESSURE STATIC 4601 AT DATUM BP Exploration PRODUCTION DATABASE WELL OPERATIONS REPORT API # Well Name Run Date Operation ------------ -------------------------------------------------- --------------------- 500292180100 1-01/J-19 05 -JUN -88 PRESSURE STATIC 4745 AT DATUM 28 -JUN -88 PRESSURE STATIC 4709 AT DATUM, 19-NOV-88 PRESSURE STATIC 4618 AT DATUM 500292160500 1-05/0-20 14 -APR -88 PRESSURE STATIC 4833 @ DATUM 500292174300 1-09/J-18 01 -OCT -87 PRESSURE STATIC 4890 AT DATUM 02 -FEB -88 PRESSURE STATIC 4788 AT DATUM 10 -OCT -88 PRESSURE STATIC 4628 AT DATUM 500292166900 1-29/M-25 02 -FEB -88 PRESSURE STATIC 4768 @ DATUM 01 -APR -88 PRESSURE STATIC 4790 AT DATUM 11 -JUN -88 PRESSURE STATIC 4726 AT DATUM 23 -OCT -88 PRESSURE STATIC 4644 AT DATUM 21 -MAR -89 PRESSURE STATIC 4636 AT DATUM 500292167200 1-35/0-25 25 -APR -88 PRESSURE STATIC 4758 @ DATUM;209 DEG. 12 -JUN -88 PRESSURE STATIC 4742 AT DATUM 25 -OCT -88 PRESSURE STATIC 4721 AT DATUM 19-NOV-88 PRESSURE STATIC 4700 AT DATUM 27 -MAR -89 PRESSURE STATIC 4631 AT DATUM 26 -SEP -89 PRESSURE STATIC 4571 AT DATUM 500292174800 1-37/P-24 07 -JAN -88 PRESSURE STATIC 4801 AT DATUM 500292182700 1-39/P-17 23 -AUG -88 PRESSURE STATIC 4705 AT DATUM 02 -DEC -88 PRESSURE STATIC 4609 AT DATUM 20 -JUN -89 PRESSURE STATIC DUAL STATIC PRESSURE 500292171300 1-41/0-23 08 -DEC -88 PRESSURE STATIC 4702 @ DATUM 500292186400 1-43/P-26 16 -DEC -88 PRESSURE STATIC 4656 AT DATUM FOR 3A2 24 -OCT -89 PRESSURE STATIC 4578 AT DATUM 500292162500 1-47/Q-21 17 -DEC -87 PRESSURE STATIC 4608 AT DATUM 03 -AUG -89 PRESSURE STATIC 4410 AT DATUM 500292184100 1-49/P-21 15 -DEC -88 PRESSURE STATIC FBHSIP=4563 AT DATUM 09 -MAY -89 PRESSURE STATIC 4440 AT DATUM 500292178800 1-55/R-25 07 -MAY -88 PRESSURE STATIC 4790 AT DATUM 06 -JUN -88 PRESSURE STATIC 4666 AT DATUM 02 -SEP -88 PRESSURE STATIC 4544 AT DATUM 22 -MAR -89 PRESSURE STATIC 4322 AT DATUM 500292187300 1-57/R-23 27 -DEC -88 PRESSURE STATIC 4439 AT DATUM 500292190500 1-63/T-22 09 -JUN -89 PRESSURE STATIC 4311 AT DATUM BP Exploration PRODUCTION DATABASE WELL OPERATIONS REPORT API # Well Name Run Date Operation ------------------------------------------------------------- --------------------- 500292185800 2-68/S-17 24-NOV-88 PRESSURE STATIC 4507 AT DATUM 500292189900 2-70/U-15 05 -MAY -89 PRESSURE STATIC 2854 AT DATUM 500292167800 3-01/N-29 10-NOV-87 PRESSURE STATIC 4839 AT DATUM 05 -DEC -87 PRESSURE STATIC 4696 AT DATUM 27 -MAR -88 PRESSURE STATIC 4512 AT DATUM 11 -JUN -88 PRESSURE STATIC 4497 AT DATUM 21-JUL-88 PRESSURE STATIC 4495 AT DATUM 22 -OCT -88 PRESSURE STATIC 4524 AT DATUM 21 -AUG -89 PRESSURE STATIC 4421 AT DATUM 500292162400 3-05/0-29 06 -DEC -87 PRESSURE STATIC 4907 PSI @ 10000 FT T 30 -MAR -88 PRESSURE STATIC 4813 @ datum 26 -MAY -88 PRESSURE STATIC 4460 @ DATUM, 23-JUL-88 PRESSURE STATIC 4498 @ DATUM, 11 -OCT -88 PRESSURE STATIC 4590 AT DATUM 19 -AUG -89 PRESSURE STATIC 4333 AT DATUM 500292178000 3-09/L-28 06 -APR -88 PRESSURE STATIC 4684 @ 9658, 500292184800 3-11/M-30 27 -SEP -88 PRESSURE STATIC 4503 AT DATUM 09-JUL-89 PRESSURE STATIC 4440 AT DATUM 500292175100 3-15/K-33 23 -DEC -87 PRESSURE STATIC 4836 AT DATUM 13 -JUN -88 PRESSURE STATIC 4558 AT DATUM (EST.) 500292171400 3-21/L-34 04 -DEC -87 PRESSURE STATIC 4736 AT DATUM' 500292164500 3-23/N-32 03 -DEC -87 PRESSURE STATIC 4828 AT DATUM 01-NOV-88 PRESSURE STATIC 4138 AT DATUM 14-JUL-89 PRESSURE STATIC DUAL STATIC 500292158600 3-27/M-33 07 -OCT -87 PRESSURE STATIC PRESS=4892 AT DATUM 17 -APR -88 PRESSURE STATIC 4404 @ 10000,220 deg. 14 -JUN -88 PRESSURE STATIC 4440 AT DATUM 24-JUL-88 PRESSURE STATIC 4444 AT DATUM 16 -FEB -89 PRESSURE STATIC 4203 AT DATUM 23 -MAY -89 PRESSURE STATIC 4373 AT DATUM; 500292166800 3-33/K-37 09 -AUG -88 PRESSURE STATIC 4513 AT DATUM 10 -AUG -88 PRESSURE STATIC 4469 AT DATUM 28 -MAR -89 PRESSURE STATIC 4414 AT DATUM 03 -APR -89 PRESSURE STATIC 4405 AT DATUM 10-JUL-89 PRESSURE STATIC 4334 AT DATUM 500292170100 3-35/L-36 11-JUL-88 PRESSURE STATIC 4438 AT DATUM; 09 -OCT -88 PRESSURE STATIC 4455 AT DATUM; BP Exploration PRODUCTION DATABASE WELL OPERATIONS REPORT API # Well Name ------------ Run Date Operation ---------- 500292170100 3-35/L-36 --------- 22 -AUG -89 ------------------------------ PRESSURE STATIC --------------------- 4350 AT DATUM 500292176400 3-39/J-39 28 -MAR -89 PRESSURE STATIC 4439 AT DATUM 10-JUL-89 PRESSURE STATIC 4386 AT DATUM 500292181100 3-45/M-39 23 -AUG -88 PRESSURE STATIC 4331 AT DATUM 26 -MAR -89 PRESSURE STATIC 4991 AT DATUM 500292156900 3-47/Q-35 26 -FEB -88 PRESSURE STATIC 4490 @ DATUM 16 -OCT -88 PRESSURE STATIC 4257 AT DATUM 20 -OCT -88 PRESSURE STATIC 4359 AT DATUM 29 -MAR -89 PRESSURE STATIC 4278 AT DATUM 15 -AUG -89 PRESSURE STATIC 4317 AT DATUM 500292173500 3-49/J-40 12 -APR -88 PRESSURE STATIC 3492 AT DATUM 15-JUL-88 PRESSURE STATIC 4443 AT DATUM 10 -AUG -88 PRESSURE STATIC 4442 AT DATUM 30 -APR -89 PRESSURE STATIC 4332 AT DATUM 500292178900 4-02/Q-28 04 -MAY -88 PRESSURE STATIC WATER INJECTOR 500292172300 4-06/.Q-32 09 -DEC -87 PRESSURE STATIC 4600 AT DATUM 18 -FEB -89 PRESSURE STATIC 4226 AT DATUM 31-JUL-89 PRESSURE STATIC 4220 AT DATUM 500292169200 4-08/P-27 26 -APR -88 PRESSURE STATIC 4541 AT DATUM 14-NOV-88 PRESSURE STATIC 4616.72 AT DATUM 22-NOV-88 PRESSURE STATIC 4746.31 AT DATUM 500292189600 4-18/S-30 22 -SEP -89 PRESSURE STATIC DUAL STATIC PRESSURE 22 -DEC -89 PRESSURE STATIC 4289 AT DATUM 500292164001 4-20/M-35 12 -AUG -88 PRESSURE STATIC 4376 AT DATUM 500292183500 4-26/0-34 18 -SEP -88 PRESSURE STATIC 4411 AT DATUM 19 -DEC -88 PRESSURE STATIC 4034 AT DATUM 21 -FEB -89 PRESSURE STATIC 3909 AT DATUM 18 -APR -89 PRESSURE STATIC 4019 AT DATUM 23 -SEP -89 PRESSURE STATIC DUAL STATIC PRESSURE 500292187000 4-28/N-37 25-NOV-88 PRESSURE STATIC 4703.5 AT DATUM 09 -MAY -89 PRESSURE STATIC DUAL ZONE STATIC PRES 500292173100 4-42/P-38 26 -JUN -88 PRESSURE STATIC 4552 AT DATUM, 27 -MAR -89 PRESSURE STATIC 3977 AT DATUM, 500292051800 5-01/SGO7 27 -MAR -88 PRESSURE STATIC 4812 @ DATUM API # Well Name Run Date ------------ ---------- -------- BP Exploration PRODUCTION DATABASE WELL OPERATIONS REPORT Operation 500292063900 5-03/SGO9 13 -AUG -89 PRESSURE STATIC --------------------- 4739 AT DATUM E ca ❑ cn 0 0 0 O T- a� cn a� n 5000 HEIR 3500 3000 2500 Pressure vs. Time ENDICOTT FIELD AREA=MPI SUBZONE=3C - , -- - i i ii i OCT 1988 APR 1-47/0-21 2-46/Q-15 n- * 2-70/U-15 JUL OCT 1989 2-26/N-14 e-� 2-52/S-14 APR JUL OCT 1990 APR -� 2-44/R-12 =-� 2-68/S-17 E m 5000 0 ZRI cn 4500 F - o . 4000 0 0 cr 3500 T 3000 U) ai 2500 Pressure vs. Time ENDICOTT FIELD AREA=MPI SUBZONE=3B OCT 1988 APR JUL OCT 1989 APR JUL OCT 1990 APR e- e 2-42/P-13 1 I I 1 ; 1 I 1 1 I 1 I 1 I I I I I 1 I I I I -- - - - - ----- - - - - - - I I 1 1 1 I I 1 O I 1 _r __y_____ I I I OCT 1988 APR JUL OCT 1989 APR JUL OCT 1990 APR e- e 2-42/P-13 1 I I 1 I 1 I 1 1 I 1 I 1 I I I I I 1 I I I I I 1 I I I I 1 1 1 I I 1 I I 1 _r __y_____ I I I 1 1 I I 1 1 1 1 1 I 1 1 1 I I 1 I 1 1 I I I 1 I 1 I I I I 1 1 1 1 1 I 1 1 I 1 I I I I 1 I 1 I 1 I 1 1 I I 1 1 1 OCT 1988 APR JUL OCT 1989 APR JUL OCT 1990 APR e- e 2-42/P-13 A i 5000 EM �M 4200 I , 1 Pressure vs. Time ENDICOTT FIELD AREA=MPI SUBZONE=3A 1 1 I 1 I I 1 I 1 I I I I I I 1 I 1 I 1 1 1 1 I ---------- I 1 I 1 -- - I I , I I I I I I 1 ._________-________y_________ r 1 I I 1 1 I 1 I I I I 1 1 _--------- ---------- 1 I I I I I 1 1 1 I I 1 1 I I 1 I I I I I I 1 I 1 I I I I I 1 i I � 1 1 I I OCT .;;, 1-05/0-20 8 2-08/K-16 - -* 2-42/P-13 ANH JUL OCT 1989 1-39/P-17 2-28/P-19 2-44/R-12 APR JUL OCT 1990 1-49/P-21 2-34/P-14 2-62/Q-17 E ro 0 5000 MA EM am 4200 EM / u Pressure vs. Time ENDICOTT FIELD AREA=MPI SUBZONE=2B 1 1 I I 1 I 1 I 1 I 1 I I 1 1 I 1 I 1 1 1 I I 1 I I I 1 I I 1 1 I I I I 1 I 1 1 1 1 I I I 1 1 ^pI 1 1 I 1 I I 1 1 I1 ------- I 1 � I � 13 I I 1 I I I 1 I 1 1 1 1 1 I 1 1 1 I 1 1 1 1 1 I I 1 1 ___ ___ `, ___ i_________I__________ 1 I 1 I 1 1 I I I 1 I 1 1 1 I 1 I I I I I I I I I 1 I I 1 I I I I 1 1 I I I I I I I 1 I 1 I 1 1 1 I I I I 1 I I I 1 I I I I I I I I I I I I I 1 I 1 I 1 I 1 I i 1 1 I I 1 I 1 I 1 1 1 I I 1 1 I 1 I 1 1 I 1 1 I 1 I I 1 1 1 II 1 1 1 1 1 I 1 I 1 1 1 1 I 1 I I 1 1 1 1 I 1 1 OCT 1988 APR JUL OCT 1989 APR JUL e--� 1-09/J-18 1-27/P-20 e $-e 1-37/P-24 1-39/P-17 n--- 2-14/0-16 2-34/P-14---* { 5-01/SD-7 OCT 1990 APR 1-35/0-25 1-41/0-23 3-17/J-30 C ro 0 0 0 0 Q T 5000 Y 4200 EM Pressure vs. Time ENDICOTT FIELD AREA=MPI SUBZONE=2A II �___--___y-_____---y_____--__1._--_____-___----_1_________ ________ ___ I I I 1 1 I I I i 1 I I I 1 I I I I I I 1 I 1 1 - t _J _4 _J _4 _J _I _t _I I I 1 1 I I I 1 I I 1 1 I I 1 I I 1 I i I I 1 1 1 1 I OCT 1988 APR JUL OCT 1989 APR JUL �e 1-01/J-19 8—e 1-09/J-18 -v 1 -29/M -25 2-04/M-19 * - fi--�—� 2-14/0-16 3-09/L-28 OCT 1990 1-27/P-20 2-06/J-22 3-17/J-30 M. 1 I I 1 I 1 I I I 1 II I 1 1 I I I I., 1 ,1 1 I I I I I I I II �___--___y-_____---y_____--__1._--_____-___----_1_________ ________ ___ I I I 1 1 I I I i 1 I I I 1 I I I I I I 1 I 1 1 - t _J _4 _J _4 _J _I _t _I I I 1 1 I I I 1 I I 1 1 I I 1 I I 1 I i I I 1 1 1 1 I OCT 1988 APR JUL OCT 1989 APR JUL �e 1-01/J-19 8—e 1-09/J-18 -v 1 -29/M -25 2-04/M-19 * - fi--�—� 2-14/0-16 3-09/L-28 OCT 1990 1-27/P-20 2-06/J-22 3-17/J-30 M. E m co `cn I H b 0 0 T To] 5000 4500 4000 3500 3000 2500 Pressure vs. Time ENDICOTT FIELD AREA=SDI SUBZONE=3C 0C 1 1988 1-55/R-25 e 3-47/Q-35 �-�-* 4-42/P-38 AM JUL UCT 1989 1-57/R-23 r �f 4-06/0-32 APR JUL OCT 1990 1-63/T-22 =—� 4-18/S-30 I I ' 1 I I I I ~r--�c�- ---------------------------------------- ------------------------- ---__r__ ------------------- r -- 1 ------------------r--------- I 11 ---------- 1 I I I ' I I I 1 I 1 1 I I I 1 I I --------•-------,-- I 1 1 1 i I I I 1 I I I I I I 1 ' -L_ I ' _4 J _I - 1 1 I 1 1 1 1 1 _y I I 1 1 1 I I I I I 1 1 1 1 I I 1 I 1 I I I I I 0C 1 1988 1-55/R-25 e 3-47/Q-35 �-�-* 4-42/P-38 AM JUL UCT 1989 1-57/R-23 r �f 4-06/0-32 APR JUL OCT 1990 1-63/T-22 =—� 4-18/S-30 E cu 0 /U) v' H 0 0 0 0 T IL W I`^ 'cn cn W a 5000 4500 -M 3500 3000 2500 Pressure vs. Time ENDICOTT FIELD AREA=SDI SUBZ014E=3B 1 I I I 1 1 I > I 1 I I I I 1 1 I > I 1 I I I I I 1 1 I I I 1 1 I I I I , I I I I I I I 1 1 I I I I 1 1 1 I I 1 1 1 1 I I 1 r i I 1 1 I I I I I 1 I I 1 1 I 1 1 I 1 1 1 1 1 1 1 1 I I 1 1 I 1 I I 1 1 1 I 1 1 1 1 I I 1 I 1 1 1 1 I I 1 I 1 1 1 I OCT 1988 APR JUL OCT 1989 APR JUL OCT 1990 APR e� 4-20/M-35 �e 4-26/0-34 �E 4-28/N-37 E M ro 0 cn 0 0 0 0 T 5000 �M 4200 MMI Pressure vs. Time ENDICOTT FIELD AREA=SDI SUBZONE=3A OC1 WOU AM JUL -e 1-43/P-26 e 3-35/L-36 - 4-08/P-27 UCT 1989 3-05/0-29 3-45/M-39 4-28/N-37 APR JUL OCT 1990 APR $- 3-23/N-32 *- *� 3-49/J-40 1 ________�-------- y____ I 1 I I 'I II 1 I I I I 1 1 1 1 1 I I I 1 OII 1L � I ------------ 1 1 I 1 I _1 1 I 1 1 1 I 1 1 � 1 1 1 I 1 1 1 I , OC1 WOU AM JUL -e 1-43/P-26 e 3-35/L-36 - 4-08/P-27 UCT 1989 3-05/0-29 3-45/M-39 4-28/N-37 APR JUL OCT 1990 APR $- 3-23/N-32 *- *� 3-49/J-40 1 ________�-------- y____ 1 I LJ I 1 1 1 1 1 I I I 1 I 1 1 I 1 I _1 1 I 1 1 1 I 1 1 1 1 1 I 1 1 1 I I I I I I 1 1 I 1 1 I 1 1 1 1 1 1 OC1 WOU AM JUL -e 1-43/P-26 e 3-35/L-36 - 4-08/P-27 UCT 1989 3-05/0-29 3-45/M-39 4-28/N-37 APR JUL OCT 1990 APR $- 3-23/N-32 *- *� 3-49/J-40 _E cu ft, f, 5000 XM M' 4200 Pressure vs. Time ENDICOTT FIELD AREA=SDI SUBZONE=2B I I 1 I I I 1 1 I I 1 I 1 1 I I 1 1 1 I I I 1 I I I 1 1 I I I I 1 1 I I I I 1 1 1 1 1 I 1 j I I I I I I I I I 1 1 I I I I I , , I 1 I I I i I I I i i i i 1 I I 1 , I I I 1 1 1 I 1 r I 1 1 1 I i I I I I -I _4 _1 _4 _1 1 1 1 1 I I _I 1 _l 1 1 I I 1 1 1 I 1 1 I I I M RIM$ APH JUL UCT 1989 APR JUL 1-43/P-26 3-01/N-29 e --g -�-$ 3-11/M-30 3-21/L-34 -* - 3-27/M-33 3-33/K-37 -Y 4-02/0-28-q 4-08/P-27 OCT 1990 3-07/N-28 3-23/N-32 3-49/J-40 5000 4800 4600 4400 4200 4000 Pressure vs. Time ENDICOTT FIELD AREA=SDI SUBZONE=2A I 1 I I I I I r I I I I I ______ I , , 1 I I I j ; 1 I r I I ____I____ ___r________ i I I I I I 1 I 1 1 V I I 1 I I I 1 I � I ----- - _L _1 1 I 1 I I I 1 � � I I I 1 1 I 1 1 I I i I I GU I WOO AM JUL UUT 1989 APR JUL OCT 1990 APR -tee 3-07/N-28 3 -11/M -30--e- 3-15/K-33 3-21/L-34 3 -33/K -37 3-39/J-39 TM — 4-02/Q-28 EXHIBIT 7 8P EXPLORATION /�--- 1 ENDICOTTI OIL FIELD s• ; 22 2.6 � L K-16 ^C 2-26 1988 I , //////•, N-14 2-�S J-18 1 1 Tracer Program Gas InJectorsl 1 J-19 I I , - — - — — — — — - — — — - Tracer rac Trecer-Rn7gram 1- - 42 P-13 I -14 Y-14 2-04 ; 51'. Water lnfecU'rs �24 -16 M-1 . , • Tracer and Ion I 1:39 Detection 2, Y,. 2-52 2-46 �2- 2', P'19 1 -20 N. I ::) • .7 34 S-14 0-1$ 0-17 1-2 1-41 P-2 0-23i 16IM Tn¢r 2-68 j ^ •* 1 3 9 '-37/P�24 con.l6q 2.16/M 16 Crban-I4 2 1-49 �' 2 ':l1-3$ ..; 4A2/Q-_1 Cu 1..lb 2-22/0:14 Cobd16D ♦�5 T6b-2 29 L-28 5-o2/so-lo Tritium 2-34/P-14 T ifi. 60 Z 1 7 -21 + r' L_25 3-17 24am 12 cow7t -I�'s. — — Q-2 — • .• — — _ - — — — — — 2J0(U IS—CoW-Tf60 — — — 1 . 4-8 3437/N 28 C.b.e.57 27 11 I 341M-79 Tritium 1-67 3-15 345/M 39 C.W11-60 1 1-$7 �r� M. 1 4-00.T-26 K3C.(C7)6• R K-33 3 al4M-34 C.,bo. 14 T-20 1- jl3- 1 t4$ -26 'pole.ium ha.ry.n«oMluu 1 T 22 I R $$ 26 41f�4 ...'x L-3 N 23 -27 L_34 333 $6; -05 K-37 3"39 1 4-04 •• -29 4 26 M-35 L-35 3-49 I_'3_, 9 39 T-26 4.6 J-40 — — — — I— — — 4.18 0-32 4.28 - - -- — — -- 1 S-30 1 N-37 I a" 349 s; 4-4fi I K-41 4- Tracer Results wen 1 D. Tr. 1-35/0-25 11/89 Cu60 1-41023 7/89 C 6D 1-41A) 23110/89 MBd804 3'05/0 29 ID/BB C14 3-2314-32 10188 C-14 - 3-2717-32 -n489 —MBAS64 4 -MIP -27 6/99 C14 4-SWK41 Iw89 MBA 504 1 ' 47 N 39 I 10 ^-T 1 ! 1 s'`,l ' _ _ � 3 4-42 ..l ._ P-36 I 4---NGEM_ElEfUKJ — — 1— Cretaceous disposal well not shown 4-48/K-43 will become a water injector pending completion v_sreo 'gq z 10000 1000 100 10 10 Exhibit 8 SEAWATER BREAKTHROUGH ANALYSIS from Mg & SO4 Ion Concentrations 100 1000 10000 MAGNESIUM ION (mg/1) SEAWATER FORMATION RUN-OFF 1-41/0-23 4-50/K-41 3-23/N-32 4-08/P-27 100 1000 10000 MAGNESIUM ION (mg/1) 1000C SGA 1000 c 100 10 10 Exhibit 8 SEAWATER BREAKTHROUGH ANALYSIS from Mg & SO4 Ion Concentrations 100 1000 10000 MAGNESIUM ION (mg/1) SEAWATER iA RUN-OFF �� ww�rs�wsrN� 100 1000 10000 MAGNESIUM ION (mg/1) clor"MA ie BP EXPLORATION 314'!:. ( i October 29, 1990 L. C. Smith, Acting Chairman Alaska Oil and Gas Conservation Commission 3001 Porcupine Drive Anchorage, Alaska 99501 Re: Waterflood Surveillance Reporting Dear Mr. Smith: .� t,xh<ubM1 YKeA -\ny BP Exploration (Alaska) Inc. 900 East Benson Boulevard P.O. Box 196612 Anchorage, Alaska 99519-6612 (907) 561-5111 RFcF�� o F go �chv0,70 pC l ss��4 As recently discussed with you and your staff, BP Exploration respectfully request changing the Endicott Waterflood Surveillance Reports from a semi- annual report, as required by paragraph 3 of the attachment, to an annual report. If the AOGCC is in agreement, the reports would be submitted to the Commission in February for each year starting in 1991. If you have any questions regarding this request, please contact Mr. H. L. Hellman at 564-4785. Sincerely, tJ T. N. Tyler Manager, Endicott Development Planning TNT/RQM/slk Enclosures cc: Working Interest Owners 1723 / ALASKA OIL AND GAS CONSERVATION CO;IPIISSION June 15, 1988 I J W Buckee, Vice President Development Planning Standard Alaska Production Company P 0 Box 196612 Anchorage, AK 99519-6612 Re: STEVECOWPER, GOVERNOR bOt Po=p-fNE0a1VE ANCHpR/1oE. AlA5 e4r9 W�WUCKE PNONE:(90>J 2MI433V� DEVEIOPME Telecopy No. PROGRAms (907) 276-7542: JU817 '88 ACrZN IN Ma _ AOqCH_ Implementation of Field -wide Waterflood A8 _ Endicott Field, Endicott Oil Pool TJO _ SOT Dear Mr Buckee: rt avy = Please refer to your June 2, 1988 subject letter outlining yourp plan to initiate a waterflood project for the Endicott Pool in the second half of 1988. Once initiated, you will -be in full compliance with Rule 12 of Conservation Order No. 202. Your field performance data suggesting the presence of a pressure anomaly separating the main and southeastern portions of the reservoir is most interesting. Your tentative plan to attempt pressure maintenance of the main portion of the reservoir by solution gas injection while maintaining southeastern portion pressure by water injection should provide valuable input for determining an optimum depletion program for achieving maximum ultimate recovery: - .The Commission understands that these tentative Endicott Pool pressure maintenance plans for achieving maximum ultimate recovery are appropriately subject to amendment as new reservoir performance data develops and is evaluated. Accordingly, please submit semi-annual pool -wide pressure maintenance project reports to the Commission in August and February for each year starting in 1989. These reports should include produced and injected volumes, a summary of waterflood performance (e.g., pressure response, water breakthru, material balance), and updated development plans. Meanwhile, the Commission anticipates approving expeditiously additional service wells for gas or water injection into the Endicott Pool upon receipt of your Application for Permit to Drill (Form 10-401) or Application for Sundry Approvals 10-403) as appropriate. .�iIES 11 EYO'ItpTT Sin rely J. 2� onnie C mi Commissioner Ae`fi16N wp !1 jo/A.RAD.67 ; /lr: dW6 - -- I AWN NI w� EXHIBIT 1 2,2 �1 �L�14 r 2-8 2-26 1 1.9 _ I\" �� 2:16 C_1B �� I I -2:43- - 2,- 4--r��}� ' -- -- — 2. 4 P-13 I ,4 \\ 2-14 2-04/y\J. 5 1 •. ., -12 16 M-11 1 1:39 ,. ' • .;�, 2 c:� 7s L -20 : , -25 .;�... 2-52 2-46 2-62 P119 • N_s�;�f 1 S-14 Q-,5 Q-17 1 2! ... P-2 / RP EXPUMATION 29 ItNDICOTT OiI l FIELD 1 Gas Injectors _ -- )--Oil-Prod ic�rs Water In,je�tors I � 2-68 5 2 9 9 3-17 t -41 2. I S-17 47' 1 21 0.23 S 1. 29 L-28 -15 _ _ 0 2 M_25 _ — — — J. T — 1 1-3 5 T-20 67 1-$7 � 11 1 3-15 fl -23. 1 4-8 3' K-33 g P-2 283- 1�+�C9=26 1-63 1 b55 6 /..�.' 3 - -27 S-2 T-22 R- '4. -29 L-34 28 3-23 N-32 4-2 O4-04 4-26 M 35 3- 7-26 4.6 — 4-1B -Q-32 - 4-28 S 30 -37 1 I �- 4 .< 12 7_37 4 42 1 [AS OF DEC�MBER 31, 198 I I 1 I 3-33 3.39 K_37 1// a 39 36 1 K,'39 1 3-4� Cretaceous disposal well not shown 4-48/K-43 will become a water injector pending completion 211190 J. Haas 4-50 K-41 4-46 I / N-39 1 / '0 0 i:�