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Home My WebLink About2000-2002 Badami ANNUAL RESERVOIR SURVEILLANCE REPORT BADAMI OIL POOL JANUARY 2000 - DECEMBER 2002 Table of Contents 1. Introduction 1 2. Summary Of Reservoir Management And Enhanced Recovery 2 3. Voidage Balance 2 4. Reservoir Pressure Monitoring 2 5. Production Logging 3 6. Special Monitoring 3 7. Evaluation Of Well Testing And Allocation 3 8. Future Development Plans 3 9. Review Of Annual Plan Of Operations And Development 3 Appendices Table 1 Badami Well Disposition Table 2 Badami Production/Injection - Surface Units Table 3 Badami Production/Injection - Reservoir Units Table 4 Badami Pressure Monitoring Summaries Table 5 Badami Well Testing Frequency Summaries Figure 1 Field Production History Figure 2 Field Gas Disposition Histories Figure 3 B1-11A Well Test Histories Figure 4 B1-15 Well Test Histories Figure 5 B1-18 Well Test Histories Figure 6 B1-25 Well Test Histories Figure 7 B1-28 Well Test Histories Figure 8 B1-36 Well Test Histories Figure 9 B1-14 Gas Injection History Figure 10 B1-21 Gas Injection History ANNUAL RESERVOIR SURVEILLANCE REPORT BADAMI OIL POOL January 2000 – December 2002 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 during the report period was 2,184,394 stb. 17,041 mmscf ofgas was produced of which 15,423 mmscf was injected. 9,481 bbls of formation water was produced. 10 wells including the disposal well have been drilled and completed to date. Well disposition is detailed in Table 1. At the end of 2002, Badami was on production with 5 producers making under 1,500 bopd. Gas injection is through the two injectors, B1-14 and B1-21. However, one injector only may be active at a given time. Supplemental gas from Endicott ceased in November 1999 with the loss of the 6" utility pipeline from Endicott due to a weld crack caused by wind induced vibration. The Point Thompson unit constructed an ice road during the 2002 winter season. Availability of the ice road allowed for surveillance and remedial wellwork. At an expense of over $400,000, surveillance and remedial well work activities were performed on nine Badami wells during the winter of 2002. Diesel/xylene bullhead treatments and progressive wireline gauge cutter runs were performed on wells B1-11A, B1-25, B-1-28 and B-1-36. These diesel/xylene treatments appear to clean paraffin and asphaltenes from the tubing and provide some near term rate benefit. Two pack-off gauge lift mandrels were run in well B1-11A to increase drawdown on the reservoir. Static reservoir pressure surveys were run in wells B-11A and B1-25 to monitor reservoir performance. Routine maintenance activities were performed on wells B1-14, B1-15, B1- 16, and B1-21. The production and gas disposition history of the field during the report period is shown in Figure 1 and 2. Figures 3 through 8 present the well test history of the producers. All of the producers showed a decrease in productivity during the report period. A well intervention program in 2002 did have a short-term positive impact on the performance of several wells. Figures 9 and 10 show the performance history of the gas injectors. Connectivity between producer/injection pairs B1-15/B1-14 and B1-18/B1-21 has been confirmed through production data, GOR trends and higher reservoir pressures. Production decline in these wells is somewhat lower, but this is offset by a more rapid GOR increases. 3. Voidage Balance Production and injection volumes, and reservoir voidage by month are detailed in Tables 2 and 3. Cumulative voidage through December 31, 2002 is negative 6,919,667 reservoir barrels. 4. Reservoir Pressure Monitoring The bottom hole reservoir pressure surveys taken at Badami during the report period are listed in Table 4. Additional reservoir pressure information is gathered while wells area shut-in by measuring closed in wellhead pressures and extrapolating to bottom hole conditions. This method provides a relative measure of areal pressure differences but unfortunately their absolute accuracy are very poor due to the inherent errors in the methodology. As such, only static pressure surveys are included in this report. 5. Production Logging No production logging was performed during the report period on wells completed in the Badami reservoir. Annual mechanical integrity and logging to confirm zonal isolation was performed on B1-01, the class 1 injection well. 6. Special Monitoring No special monitoring activities were performed during the report period. 7. Evaluation of Well Testing and Allocation The number of well tests for each of the Badami wells is presented in Table 5. The rapid rate decline seen in all of the wells and the limited well stock results in a production well testing frequency that is much higher than typical reservoirs. The methodology for daily oil production allocation to each well has not changed, and was accomplished by pro-rating the oil rates such that the total oil produced from all of the wells equaled that recorded by the fiscal pipeline meter while honoring the well tests. 8. Future Development Plans Currently there are no plans for development drilling or further reservoir development of the Badami Brookian reservoir. Plans are to continue producing with the current well stock. Modifications to the vibration dampeners were placed on the 6” utility pipeline from Endicott to mitigate further damage caused by vibration. No major changes to the current infrastructure are planned, and the field will be operated with limited manpower (with an average of 15 people on site) as long as production continues. Wellwork will be limited to remedial non-rig work when necessary and possible, and surveillance when required. The possibility of successful exploration in the area around the Badami unit may bring forward new options for Badami reservoir. 9. Review of Annual Plan of Operations and Development Despite the poor performance of the wells, the Plan of Operations remains unchanged at this time. Appendices Table 1 Badami Well Disposition Well Completion Date Disposition Comment B1-11A 3/4/98 Pre-produced injector cased and prop fracced. Producer 8/24/98 to present. B1-14 5/1/98 Gas 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 open hole. Dedicated producer. Supported by injection from B1-14. B1-16 6/13/98 Pre-produced injector, cased Injector 8/24/98 to 9/25/98. Producer 9/26/98 to 10/21/98. Currently shut in. B1-18 4/3/98 Producer, cased and prop fracced. Dedicated producer. B1-21 1/6/98 Pre-produced gas injector, fracced, no proppant Producer 8/24/98 to 11/30/98, then converted to gas injector. B1-25 11/20/98 Producer, unilateral open hole. Unilateral open hole dedicated producer.. B1-28 10/20/98 Producer, trilateral open hole. Trilateral open hole dedicated producer. B1-36 5/23/99 Producer. Dedicated producer. As of December 31, 2002 Table 2 Badami Production/Injection - Surface Units 2000 PRODUCTIONJanFebMarAprilMayJuneJulyAugSeptOctNovDec2000 TotalOil(stb)90,99181,66480,27678,15581,15976,93181,52980,90360,73783,02067,44767,548930,360Associated Gas(mscf)53,32147,85547,04245,79947,55945,08247,77647,40935,59248,65039,52439,583545,191Free Gas(mscf)211,015274,207182,813348,873264,950386,537287,465486,016434,952418,152417,732298,9934,011,706Water(stb)33737629727734218013962282282,6622000 INJECTIONWater(stb)0000000000000Gas(mscf)219,626277,638184,527347,912267,416389,418294,211483,995426,665418,285407,652302,2074,019,5522001 PRODUCTIONJanFebMarAprilMayJuneJulyAugSeptOctNovDec2001 TotalOil(stb)65,43554,73762,06555,35462,75057,51761,15149,04652,67254,96853,83745,231674,763Associated Gas(mscf)38,34532,07636,37032,43736,77233,70535,83428,74130,86632,21131,54826,505395,411Free Gas(mscf)237,909419,859318,065429,234417,231356,839337,406385,010551,273325,176599,182539,7724,916,954Water(stb)2263472972973963143321904361833,0182001 INJECTIONWater(stb)0000000000000Gas(mscf)242,430410,032308,930417,158407,662350,047333,549374,248536,483310,090584,397511,4404,786,4662002 PRODUCTIONJanFebMarAprilMayJuneJulyAugSeptOctNovDec2002 TotalOil(stb)44,34042,15961,01061,08955,86150,88342,71642,12645,25146,03340,99946,804579,271Associated Gas(mscf)25,98324,70535,75235,79832,73529,81725,03224,68626,51726,97524,02527,427339,453Free Gas(mscf)516,491473,281602,642599,218575,230615,906637,758564,935554,541614,103495,540582,5256,832,169Water(stb)5444214284564743325513572383,8012002 INJECTIONWater(stb)0000000000000Gas(mscf)490,423456,747590,517593,129560,562598,357614,519541,101534,203590,415479,086567,5026,616,561Note(1)Gas produced in April was associated to wellwork on gas injector B1-14.(2)Per a discussion between Jack Hartz and Anna Dube on 3/22/00, a solution GOR of 586 was determined using production data from 8/98 to 2/99 and is used in calculating volumes of associated gas.This was done to address the fact there are different types of oil in the reservoir with different GOR.(3)Volumes of produced water are reported here although they are not reported in other production allocation and injection reporting due to not being of significant volume. Volumes are reported for the month the water is removed from the test separator and sent to the disposal well. Table 3 Badami Production/Injection - Reservoir Units 2000 PRODUCTIONJanFebMarAprilMayJuneJulyAugSeptOctNovDec2000 TotalOil(rb)118,288106,163104,359101,602105,507100,010105,988105,17478,958107,92687,68187,8121,209,468Gas(rb)154,229187,910134,111230,275182,336251,832195,599311,231274,543272,359266,790197,5452,658,758Water(rb)3400380300280345182140002302302,689All fluids(rb)272,858294,073238,849332,176288,122352,187301,769416,406353,901380,285354,701285,5883,870,9152000 INJECTIONWater(rb)0000000000000Gas(rb)128,143161,990107,664202,992156,026227,209171,660282,391248,941244,052237,848176,3252,345,240All fluids(rb)128,143161,990107,664202,992156,026227,209171,660282,391248,941244,052237,848176,3252,345,240Voidage(rb)-144,715-132,083-131,186-129,184-132,096-124,978-130,109-134,015-104,960-136,234-116,853-109,262-1,525,6752001 PRODUCTIONJanFebMarAprilMayJuneJulyAugSeptOctNovDec2001 TotalOil(rb)85,06671,15880,68571,96081,57574,77279,49663,76068,47471,45869,98858,800877,192Gas(rb)161,183263,685206,798269,366264,891227,866217,770241,406339,654208,520368,004330,3993,099,542Water(rb)228035030030004003173351924401853,048All fluids(rb)246,476334,843287,832341,626346,766302,638297,666305,483408,463280,171438,433389,3843,979,7812001 INJECTIONWater(rb)0000000000000Gas(rb)141,448239,236180,248243,394237,854204,238194,612218,358313,015180,924340,971298,4042,792,702All fluids(rb)141,448239,236180,248243,394237,854204,238194,612218,358313,015180,924340,971298,4042,792,702Voidage(rb)-105,029-95,607-107,585-98,232-108,912-98,400-103,054-87,125-95,447-99,246-97,462-90,980-1,187,0802002 PRODUCTIONJanFebMarAprilMayJuneJulyAugSeptOctNovDec2002 TotalOil(rb)57,64254,80779,31379,41672,61966,14855,53154,76458,82659,84353,29960,845753,052Gas(rb)316,511290,554372,476370,505354,722376,752386,710344,019339,023374,042303,144355,8814,184,340Water(rb)5490425432046147933505573612403,839All fluids(rb)374,702345,361452,214450,353427,341443,361442,720399,118397,849434,442356,804416,9674,941,2322001 INJECTIONWater(rb)0000000000000Gas(rb)141,448239,236180,248243,394237,854204,238194,612218,358313,015180,924340,971298,4042,792,702All fluids(rb)141,448239,236180,248243,394237,854204,238194,612218,358313,015180,924340,971298,4042,792,702Voidage(rb)-233,255-106,124-271,967-206,959-189,488-239,123-248,108-180,760-84,834-253,517-15,833-118,563-2,148,530Oil Formation Volume Factor, Bo (1)1.300rb/stbGas Formation Volume Factor, Bg (2)0.00058rb/scf0.00328vol/volNote(1)Bo from Average of Badami#1 and Badami#5 (lower sand) PVT analysis.(2)Bg calculation based on gas composition of sample taken 9/18/98185° fReservoir temperature 6400 psiReservoir pressure Table 4 Badami Pressure Monitoring Summary Well Date Operation Comment B1-11A 4-Mar-02 Pressure static 3815 psia @ 10,500 ft tvdss B1-25 30-Mar-02 Pressure static 3310 psia @ 10,500 ft tvdss Table 5 Badami Well Testing Frequency Summary Well Number of Well Tests in 2000 Number of Well Tests in 2001 Number of Well Tests in 2002 B1-11A 50 49 102 B1-15 57 22 3 B1-18 17 12 6 B1-25 46 37 83 B1-28 56 33 59 B1-36 83 46 58 Figure 1 Field Production History Badami Field Oil Production02,0004,0006,0008,00010,00012,00014,00016,00018,00020,000Aug-98Oct-98Jan-99Apr-99Jul-99Oct-99Jan-00Apr-00Jul-00Oct-00Jan-01Apr-01Jul-01Oct-01Jan-02Apr-02Jul-02Oct-02Daily Oil volume (bbls) Figure 2 Field Gas Disposition Histories Badami Field Gas Disposition0.05.010.015.020.025.030.035.08/1/9810/31/981/30/995/2/998/1/9910/31/991/31/005/1/008/1/0010/31/001/30/015/2/018/1/0110/31/011/31/025/2/028/2/0211/1/02Daily Gas Volume (mmscf)FuelFlareInjectionEndicott Figure 3 B1-11A Well Test Histories Figure 4 B1-15 Well Test Histories Figure 5 B1-18 Well Test Histories Figure 6 B1-25 Well Test Histories Figure 7 B1-28 Well Test Histories Figure 8 B1-36 Well Test Histories Figure 9 B1-14 Gas Injection History Figure 10 B1-21 Gas Injection History