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Home My WebLink About1998 Badami3001 Porcupine Drive Anchorage, AK 99501 I FILE I I Dear Mr. Christenson, In accordance with the requirements of Rule 9 of the Badami Oil Pool Area Injection Order dated August 26, 1998, please find enclosed the Annual Reservoir Surveillance Report for the field. The report covers the time period from plant start up on August 24, 1998, to March 31, 1999. If you have any questions about the report please do not hesitate to contact us. Sincerely, Y'L /o/ "17 Gary Osborne Eastern North Slope Subsurface Manager cc: S•Potter B.Turnbull File: AOGCC XC1 VF :.abKd Oil & CaUs Long, (+Ui��iRiSSlt. Anchorage FSu . r izi BP EXPLORATION: March 29, 1999 SF� G:<w 5 E Robert N. Christenson, Chairman Alaska Oil and Gas Conservation Commission TEC'01 3001 Porcupine Drive Anchorage, AK 99501 I FILE I I Dear Mr. Christenson, In accordance with the requirements of Rule 9 of the Badami Oil Pool Area Injection Order dated August 26, 1998, please find enclosed the Annual Reservoir Surveillance Report for the field. The report covers the time period from plant start up on August 24, 1998, to March 31, 1999. If you have any questions about the report please do not hesitate to contact us. Sincerely, Y'L /o/ "17 Gary Osborne Eastern North Slope Subsurface Manager cc: S•Potter B.Turnbull File: AOGCC XC1 VF :.abKd Oil & CaUs Long, (+Ui��iRiSSlt. Anchorage ANNUAL RESERVOIR SURVEILLANCE REPORT BADAMI OIL POOL AUGUST 1998 — MARCH 1999 FIVFF,,, avka 0"' 5 Cons. Anchorago;" Table of Contents 1. Introduction 1 2. Summary Of Reservoir Management And Enhanced Recovery 2 3. Voidage Balance 3 4. Reservoir Pressure Monitoring 4 5. Production Logging 5 6. Special Monitoring 6 7. Evaluation Of Well Testing And Allocation 7 8. Future Development Plans 8 9. Review Of Annual Plan Of Operations And Development 9 Appendices Figure 1 Badami Chronology Figure 2 81-11A Production History Figure 3 81-14 Production History Figure 4 81-15 Production History Figure 5 81-16 Production History Figure 6 81-18 Production History Figure 7 81-21 Production History Figure 8 81-25 Production History Figure 9 81-28 Production History Figure 10 Badami surface Sample Crude API's Figure 11 Badami Surface Sample Crude Viscosity's @ 1 atm Figure 12 81-14 Gas Injection History Table 1 Badami Well Disposition Table 2 Badami Production/Injection - Surface Units Table 3 Badami Production/Injection - Reservoir Units Table 4 Badami Pressure Monitoring Summary Table 5 Badami Well Testing Frequency Summary ANNUAL RESERVOIR SURVEILLANCE REPORT BADAMI OIL POOL AUGUST 1995 - MARCH 1999 1. Introduction As required by Rule 9 of the Badami Oil Pool Area Injection Order, dated August 26, 1998, this report provides a summary of the enhanced oil recovery operations at Badami. It will address the following: • Progress of the enhanced recovery project and reservoir management summary including engineering and geological parameters. • Voidage balance by month of produced fluids and injected fluids. • Analysis of reservoir pressure surveys within the pool. • Results and where appropriate, analysis of production and injection logs, tracer surveys and observation well surveys. • Special monitoring. • Evaluation of well testing and allocation. • Future development plans. • Review of Annual Plan of Operations and Development. 2. Summary of Reservoir Management and Enhanced Recovery The total volume of oil produced from the Badami reservoir, as of February 4, 1999, was 843,319 stb. 530,622 mscf of associated gas was produced with the oil, of which 8,276 mscf has been injected. No formation water has been produced. 9 wells have been drilled and completed to date. Well disposition is detailed in Table 1. First oil into the Badami sales oil pipeline commenced on August 24, 1998. At this time 7 wells had been drilled and completed. The development drilling pace was slower than expected, which led to fewer wells being available than were planned. Two additional wells have been completed since plant start up. B1-28, the second multi -lateral open hole producer was brought on line in October 1998, and B1-25, a uni-lateral open hole producer started production in November. A graphical chronology of production events and drilling sequence at Badami is attached as Figure 1. Figures 2 through 9 show the production history of the producers. The initial production decline in all of these wells was more than anticipated. Reservoir oil quality was determined from analysis of samples taken from surface production streams. The results of this sampling are shown in Figure 10 and 11. The oil quality was as predicted. Initial attempts to establish gas injection into B1-14 were unsuccessful. The well required fraccing and a period of preproduction before continuous injection was possible. By the time this was achieved, on December 8, 1998, the oil production rate had declined to the point where very little gas was available for injection, after fuel gas had been extracted. Mechanical problems with the gas compressors compounded the issue, and only a very small volume of gas was injected before the process plant was put into warm shut down due to the low ambient temperatures and the low production rate. Figure 12 shows the gas injection history of B1-14. Initial attempts to establish gas injection into B1-16 were similarly unsuccessful. In December 1998, B1-21 was mechanically converted into an injector, and awaits a period where more gas is available to commence injection. The very low volumes of gas that had been injected into the reservoir have meant that no quantitative determination of reservoir connectivity has been possible. It is the intention to establish gas injection at the earliest opportunity, and to commence MI injection thereafter once positive connectivity can be demonstrated. 3. Voidage Balance Production and injection volumes, and reservoir voidage by month are detailed in Tables 1 and 2. Cumulative voidage to April 1 1999 is negative 1,091,486 reservoir barrels. As discussed in Section 2, this negative voidage has been as a result of the difficulties we have experienced in establishing gas injection into the reservoir. 4. Reservoir Pressure Monitoring Details of the reservoir pressure monitoring that has taken place at Badami is listed in Table 3. Additionally, during the current warm shut down of the facilities, we are monitoring the shut in well head pressures in all applicable wells, and from these plan to extrapolate bottom hole pressures. S. Production Logging A flowmeter was run in 61-15, the first multi -lateral open hole producer, on September 9, 1998, to determine the proportional contribution of the laterals to the production from the well. This indicated that between 50 and 70% of the flow from the well was coming from the main lateral, with 30 to 50% entering from the junction which contributed the flow from the other two bores. On December 29, 1998, a flowmeter was run in 61-25. Results showed 60% of the flow coming from the F4 sands, and 40% from the F5 sands. A flowing bottom hole pressure of 2000 psi was recorded. No injection logs have been run, and injection tracers have not been utilized at this time. 6. Special Monitoring No monitoring other than that described elsewhere in this document has been carried out. 7. Evaluation of Well Testing and Allocation The summary of well testing frequency for each of the Badami wells is presented in Table 5. The rapid rate decline seen in all of the wells caused the production well testing frequency to be much higher than would normally be expected. Daily oil production allocation to each well was accomplished by a method of pro- rating the oil rate from that wells most recent well test such that the total oil produced from all of the wells equaled that recorded by the fiscal pipeline meter. S. Future Development Plans Oil production at the Badami has been temporarily suspended in order to perform well work and to collect and analyze additional reservoir data. Timing of the suspension was dictated by extreme low temperatures on the North Slope. BP plans to resume production in several months, on completion of the evaluation program. Establishment of sustained gas injection is a major objective once production resumes. This is the first step towards the longer term goal of determining the extent to which the sands are continuous within the reservoir, and the establishment. Additional prospectivity in the Badami area beyond the Brookian sands is being tested with the B1-36 well which is expected to be completed in May 1999. 9. Review of Annual Plan of Operations and Development Despite the poor performance of the wells and the temporary shut down of the plant, the Plan of Operations and Development remains unchanged at this time. Appendices Tables Figures rJ T% E C VF F - Vi A iPswa 0j) & &,s Cons. Anchorage Figure 1 BADAMI CHE(DMOLOQY AUG 98 Si[ 93,'. OCT 98.NOV 98 DEC 9. JAN `99 FEB 99 6/30 IBI -28 1p/19 10/24 SI -25-1,1/2711122 Bi -38 ITIS Rig mainte `Plant start-up Begin packing 6" line !� Unsuccessful injection into BI -16 and B1-14 B1-16 Frac 481-14 Frac ITAPS slowdownl 81-18 no flaw after shut-in B1-18 gas lift initiated 83.-35 gas 18- 16 .0 14 CL12- 0 10- E 86 4 2 0 Z NO .B -S 1B in TL, K 0 t� 0 t1C d Pour Point chemical injection started I Endicott gas line hot tap complete BI -11A gas Converted B1-14 to gas injector _%; Converted Bl -21 �j to gas injector Begin importing Endicott gas for fuel BI -18 full gas lift desicln run Rig released to Red Dog CfApproval received rom RNR to inject Endicott gas into Badami reservoir 4Plant warm S/D T _� Figure 2 1 -Aug -98 1 -Sep -98 1 -Oct -98 B1 -11A Production and Wellwork History 1 -Nov -98 1 -Dec -98 1 -Jan -99 1 -Feb -99 1 -Mar -99 1 -Apr -99 10000- 17 Wh Pres Avg O Wh Temp Avg GOR 17,7 v ° -- Oil Rate Gas Lift 1000 v $Vv vvv ° �k- ° 100- 0 O O DD I -VO ID C}O O O O O O O 77 10 --n(n -o m 0 v -0 -q 0 a i in i v r� i e v 1 -Aug -98 1 -Sep -98 1 -Oct -98 1 -Nov -98 1 -Dec -98 1 -Jan -99 1 -Feb -99 1 -Mar -99 1 -Apr -99 Figure 3 1 -Sep -98 1 -Oct -98 B1-14 Production and Wellwork History 1 -Nov -98 1 -Dec -98 1 -Jan -99 1 -Feb -99 1 -Mar -99 1 -Apr -99 10000 D Wh Pres Avg Wh Temp Avg IV O a "V GOR v 17 Q -^ Oil Rate 1000 0 17 17 0 Gas Le ft D '117 0 17 104 D O QD O O O O O O C) OqO O O O O0 O O O � O O O OO O O O O 10 O O O O r m C J C O `� _Ty-n0 G)oo z, G) vw w r Ar rw r ♦ v v • 1 -Sep -98 1 -Oct -98 1 -Nov -98 1 -Dec -98 1 -Jan -99 1 -Feb -99 1 -Mar -99 Wwv W 7VT7 0 O 1 -Apr -99 Figure 4 1 -Aug -98 10000 illif t, 100 10 B1-15 Production and Wellwork History 1 -Sep -98 1 -Qct -98 1 -Nov -98 1 -Dec -98 1 -Jan -99 1 -Feb -99 1 -Mar -99 1 -Apr -99 t m 24 L 18 12 6 O 0 1 -Aug -98 Q T G) O 0 3G) G) ca r TY • r v v 1 -Sep -98 1 -Oct -98 1 -Nov -98 1 -Dec -98 1 -Jan -99 1 -Feb -99 1 -Mar -99 1 -Apr -99 Figure 5 1 -Sep -98 10000 1 -Oct -98 B1-16 Production 1 -Nov -98 1 -Dec -98 and Wellwork History 1 -Jan -99 1 -Feb -99 1 -Mar -99 1 -Apr -99 o W h Pres Avg O Wh Temp Avg G' v D GOR 1000 Oil Rate Gas Lift V'7 v '7 vv v v 100 vv v v vX7,7 v v o AMP)0 0 n CQ 0 0� 0 0 0 00 ° (3D0 e C V 00 O c) 000 0 o O 0 O r. 0-0 (nn YKm -U f -±;O Co • vv • vw IC 1 -Sep -98 1 -Oct -98 1 -Nov -98 1 -Dec -98 1 -Jan -99 1 -Feb -99 1 -Mar -99 1 -Apr -99 0 Figure 6 1 -Aug -98 1000" 1QQ 1c B1-18 Production and We Ilwork History 1 -Sep -98 1 -Oct -98 1 -Nov -98 1 -Dec -98 1 -Jan -99 1 -Feb -99 1 -Mar -99 1 -Apr -99 G) rn v L7 n ( C G1 G7 1 -Aug -98 1 -Sep -98 1 -Oct -98 1 -Nov -98 1 -Dec -98 1 -Jan -99 1 -Feb -99 1 -Mar -99 1 -Apr -99 Figure 7 1 Aug -98 B1-21 1 -Sep -98 1 -Oct -98 Production and Wellwork History 1 -Nov -98 1 -Dec -98 1 -Jan -99 1 -Feb -99 1 -Mar -99 1 -Apr -99 10000- 7 Wh Pres Avg v O Wh Temp Avg Chi C7 GOR 1000 0 0 D o Oil Rate Gas Lift o v'-;�F o 100— a o °V ° VIV ° 1 ° v 77 V 7171 0 0 0 0 00 0 0 0 0 0 10 O 0 0 ° o o 0 0 w i i rOr i U 1 -Aug -98 1 -Sep -98 1 -Oct -98 1 -Nov -98 1 -Dec -98 1 -Jan -99 1 -Feb -99 1 -Mar -99 1 -Apr -99 Figure 8 B1-25 Production and Wellwork History 1 -Aug -98 1 -Sep -98 1 -Oct -98 1 -Nov -98 1 -Dec -98 1 -Jan -99 1 -Feb -99 1 -Mar -99 1 -Apr -99 10000- V Wh Pres Avg O Wh Temp Avg GOR -■ Oil Rate 1000 Gas Lift d D �7 O p 100 O O O 10 m o � O � • V i 24 s 18 12 J 6 c O 0 1 -Aug -98 1 -Sep -98 1 -Oct -98 1 -Nov -98 1 -Dec -98 1 -Jan -99 1 -Feb -99 1 -Mar -99 1 -Apr -99 Figure 9 B1-28 Production and Wellwork History 1 -Au g-98 1 -Sep -98 1 -Oct -98 1 -Nov -98 1 -Dec -98 1 -Jan -99 1 -Feb -99 1 -Mar -99 1 -Apr -99 10000 �7 Wh Pres Avg O Wh Temp Avg GOR Oil Rate Gaffs Gift 1000 17177 v V ° v 100 ° 0 O 0 Q 0 v v O O O 10 ?n G) G) -4 r- r 1 -Aug -98 1 -Sep -98 1 -Oct -98 1 -Nov -98 1 -Dec -98 1 -Jan -99 1 -Feb -99 0 1 -Mar -99 1 -Apr -99 33 31 29 27 23 21 19 17 ! 10/19/98 Figure 10 Badami Surface Sample Crude API's 10/26/98 11/2/98 11/9/98 11/16/98 11/23/98 11/30/98 12/7/98 12/14/98 12/21/98 12/28/98 1/4/99 Date �""B1-11a ��B1-14 ��B1-15 M B1-16 -45'B1-18 JB1 -21 JB1 -28 --W-B1-25 F. 1000 100 10- Figure 11 Badami Surface Sample Crude Viscosities @ 1 atm 10 100 Temp (deg F) Reservoir Temp @ 10,000 TVDSS 1000 r -Transit crude ABadami-5 DST #2 ABadami-5 DST #1 ♦Badami-4 DST #1 p B1-28 p B1-25 +B1-21 XB1-18 XB1-16 ' • B1-15 NIP r 4 {-B1-14 O B1 -11a Pressure correction for original reservoir NII N conditions: multiply surface viscosity by o 0.32 10 100 Temp (deg F) Reservoir Temp @ 10,000 TVDSS 1000 Figure 12 1 -Sep -98 1800 1600 1400 1200 E 11 1000 m c 800 a> C @ 600 C7 400 200 0 24 18 v C 12 J C O 6 I B1-14 Gas Injection History 1 -Oct -98 1 -Nov -98 1 -pec -98 1 -Jan -99 1 -Feb -99 1 -Mar -99 1 -Apr -99 6000 EL 3000 0 a� 2000 w 1000 0 1 -Sep -98 1 -Oct -98 1 -Nov -98 1 -Dec -98 1 -Jan -99 1 -Feb -99 1 -Mar -99 1 -Apr -99 a� r_ Table 1 Badami Well Disposition Well Completion Disposition at Start Comment Date up 8/24/98 B1 -11A 3/4/98 Preproduced injector, Producer 8/24/98 to present. cased and prop fracced. B1-14 5/1/98 Injector, cased. Injector 8/24/98 to 9/29/98. Producer 9/30/98 to 11/29/98. Injector 9/30/98 to present. B1-15 7/31/98 Producer, trilateral Dedicated producer. open hole. B1-16 6/13/98 Preproduced injector, Injector 8/24/98 to 9/25/98. cased Producer 9/26/98 to present. B1-18 4/3/98 Producer, cased and Dedicated producer. prop fracced, B1-21 1/6/98 Preproduced injector, Producer 8/24/98 to 11/30/98, fracced no proppant then converted to injector. B1-25 11/20/98 Not drilled Unilateral open hole dedicated producer. Bi -28 10/20/98 Not drilled Tri lateral open hole dedicated producer. Table 2 BADAMI PRODUCTION / INJECTION - SURFACE UNITS 1998 PRODUCTION Aug Sept Oct Nov Dec 1998 Total Oil (stb) 83,152 223,455 132,002 152,083 140,198 730,890 Associated Gas (mscf) 53,413 149,206 91,850 88,738 76,219 459,426 Free Gas (mscf) 0 0 0 0 0 0 Water (stb) 0 0 0 0 0 0 1998 INJECTION 2,855 0 0 2,855 Water (stb) 0 0 0 0 0 0 Gas (mscf) 0 16 0 30 5,375 5,421 1999 PRODUCTION Jan Feb Mar 1999 Total Oil (stb) 102,653 9,776 0 112,429 ,Associated Gas (mscf) 65,230 5,966 0 71,196 Free Gas (mscf) 0 0 0 8,276 Water (stb) 0 0 0 0 1999 INJECTION Water (stb) 0 0 0 0 Gas (mscf) 2,855 0 0 2,855 CUMULATIVE Cumulative PRODUCTION Total Oil (stb) 843,319 Associated Gas (mscf) 530,622 Free Gas (mscf) 0 Water (stb) 0 CUMULATIVE INJECTION Water (stb) 0 Gas (mscf) 8,276 Table 3 BADAMI PRODUCTION / INJECTION - RESERVOIR UNITS PRODUCTION Aug Sept Oct Nov Dec 1998 Total Oil (rb) 108,098 290,492 171,603 197,708 182,257 950,157 Free Gas (rb) 0 0 0 0 0 0 Water (rb) 0 0 0 0 0 0 All fluids (rb) 108,098 290,492 171,603 197,708 182,257 950,157 1998 INJECTION 1,666 0 0 1,666 All fluids (rb) 1,666 Water (rb) 0 0 0 0 0 0 Gas (rb) 0 9 0 18 3,136 3,163 All fluids (rb) 0 9 0 18 3,136 3,163 Voidage (rb) -108,098 -290,482 -171,603 -197,690 -179,121 -946,994 PRODUCTION Jan Feb Mar 1999 Total Oil (rb) 133,449 12,709 0 146,158 Free Gas (rb) 0 0 0 0 Water (rb) 0 0 0 0 All fluids (rb) 133,449 12,709 0 146,158 1999 INJECTION Water (rb) 0 0 0 0 Gas (rb) 1,666 0 0 1,666 All fluids (rb) 1,666 0 0 1,666 Voidage (rb) -131,783 -12,709 0 -144,492 CUMULATIVE Cumulative PRODUCTION Total Oil (rb) 1,096,315 Free Gas (rb) 0 Water (rb) 0 All fluids (rb) 1,096,315 CUMULATIVE INJECTION Water (rb) 0 Gas (rb) 4,829 All fluids (rb) 4,829 Voidage (rb) -1,091,486 Oil Formation Volume Factor, Bo (1) 1.300 rb/stb Gas Formation Volume Factor, Bg (2) 0.000583 rb/srf 0.003276 vol/vol (1) Bo From Average of Badami#1 and Badami#5 (lower sand) PVT analysis. (2) Bg calculation based on gas composition of sample taken 9/18/98 Reservoir temperature 185°F Reservoir pressure 6400 psi Table 4 Badami Pressure Monitoring Summary Well Date Operation Comment B1 -11A 16 -Aug -98 Pressure static 6411 psia @ 10298 ftTVSss B1 -11A 5 -Dec -98 Set downhole gauge B1 -11A 19 -Dec -98 Pulled downhole gauge No PBU attempted, needed rate to fill pipeline at low temperatures B1-14 20 -Aug -98 Pressure static 6405 psig @ 10141 ftTVDss B1-14 6 -Oct -98 Set downhole gauge B1-14 5 -Nov -98 Pulled downhole gauge Well unstable prior to PBU, extensive wellbore storage effects, no conclusive analysis possible 131-15 12 -Sep -98 Set downhole gauge B1-15 2 -Oct -98 Pulled downhole gauge Difficult analysis due to well geometry. Rate decline not caused by com letion or well damage. B1-16 21 -Au -98 Pressure static 6365 psig @10172 ftTVSss B1-18 29 -Mar -98 Pressure RFT B1-18 7 -Oct -98 Set downhole gauge B1-18 8-0ct-98 Pulled downhole gauge Well would not kick off after gauge set gauge retrieved. B1-18 7 -Dec -98 Set downhole gauge Downhole shut in tool used. B1-18 16 -Dec -98 Pulled downhole gauge Pressure still building after 5 days, B1-21 16 -Aug -98 Pressure static 6343 psig @ 10126 ftTVDss B1-21 5 -Oct -98 Set downhole gauge B1-21 11 -Oct -98 Pull downhole gauges Gauges were dead at initiation of PBU no data to analyze. B1-21 18 -Dec -98 Set downhole gauge B1-21 15-3an-99 Pulled downhole gauge Final pressure after 47 days shut in was 3625 psig at 8169 ftTVSss. B1-25 6 -Dec -98 Set downhole gauge No PBU attempted, needed rate to fill pipeline at low temperatures. 131-2$ 21 -Oct -98 Pressure static 6309 psig at 10000 ftTVDss Table 5 Badami Well Testing Frequency Summary Well Earliest Test Latest Test Number of Well Tests Average Well Tests per Month 81-11A 4 -Sep -98 27 -Jan -99 49 10 B1-14 25 -Oct -98 22 -Nov -98 13 14 B1-15 8 -Sep -98 28 -Jan -99 45 10 61-16 8 -Sep -98 29-1an-99 33 7 81-21 6 -Sep -98 27 -Nov -98 12 4 61-25 24 -Nov -98 29 -Jan -99 28 13 81-28 22 -Oct -98 26-3an-99 40 13