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Home My WebLink About2010 Swanson TyonekChevron February 28, 2011 Chantal Walsh Petroleum Engineer MidContinent/Alaska SBU Chevron North America Exploration and Production 3800 Centerpoint Dr., Ste 100 Anchorage, AK 99503 Tel (907) 263-7627 Email pwinslow@chevron.com RECEIIV. MEL Mr. Dan Seamount, Chairman Alaska Oil and Gas Conservation Commission LIAR 0 1 2011 333 W. 7 1 Avenue, Suite 100 Anchorage, AK 99501 & go 8 Gas cons. c!'I mssior Re: 2010 Annual Material Balance Calculations of Production and Injection Volumes Swanson River Gas Storage Facility #3 (Tyonek 77-3 sand) Swanson River Field Dear Commissioner Seamount: Attached for your review is the annual material balance calculation of production and injection volumes for the Swanson River Gas Storage Facility #3 (SRGSF #3), as required per AOGCC Storage Injection Order #6 (SIO #6). SRGSF #3 applies to the Tyonek 77-3 reservoir, which has had four wells completed in it, SCU 42A-05, SCU 42B-05, SCU 42-05X, and SCU 42-05Y. This material balance report covers the primary production period (Jul. 2004 — Nov. 2005), as well as the gas storage operations that have taken place since Dec. 2005. Attachment #1 is a table of gas production and injection volumes for the SCU 42A-05, SCU 4213-05, SCU 42-05X, and SCU 42-05Y wells, from the commencement of primary production, through February 22, 2011. Note that the January and February 2011 volumes are estimates from daily metered values. Historic reservoir pressure estimates have been obtained primarily through surface shut-in tubing pressure (SITP) readings, which were then converted to bottomhole pressures. In addition to the SITP's, downhole pressure gauges have been run several times, to obtain static bottomhole pressures and/or to conduct pressure transient tests. These data points are tabulated in Attachment #2 and plotted versus the corresponding net cumulative production on the standard P/Z plot (Attachment #3). In September 2010, a pressure fall off test was run on SCU 42-05X. A Schlumberger pressure transient specialist modeled the results. The analysis output was an average reservoir pressure of 4765 psi versus the downhole pressure gauge reading of 4916 psi. Schlumberger's model identified the reservoir behavior as indicative of a dual layer system. With time, the pressure equilibrated into both layers. This behavior has also been observed in past injection cycles. Viewing Attachment #3, it has previously been noted that the earlier injection cycle pressures deviate above the straight line path established from the primary depletion points. The latest 2010 injection and 2010/2011 production cycles mimicked the previously established injection and production trends, indicating the continued containment of the gas storage volumes. MidContinent/Alaska SBU/Chevron North America Exploration and Production www.chevron.com Swanson River Gas Storage Facility #3 2010 Annual Performance Report Page 2 During the peak of the 2009/2010 winter production season (Nov. '09 — Mar. '10), a net total of 442 MMcf of gas was produced from the 77-3 reservoir. From Apr. - Oct. '10, a net total of 464 MMcf of gas was injected back into storage, via the SCU 42-05X and SCU 42-05Y wellbores. To date (2/22/10) an estimated total of 1,229 MMcf of gas has been withdrawn from storage (from the 77-3 reservoir) during the 2010/2011 winter season. If you have any questions regarding this annual performance report, please contact Chantal Walsh at your earliest convenience. Sincerely, Chantal R. Walsh Petroleum Engineer Cc: Dave Whitacre File Room Attachments Union Oil Company of California / A Chevron Company http://www.chevron.corn ATTACHMENT #1 SRGSF #3 - PRODUCTION AND INJECTION VOLUMES (TYONEK 77-3 SAND) 3/1/2011 Prod inj updated 2-21-11.xls SCU 42A-05 SCU 4213-05 SCU 42-05X SCU 42-05Y Tyonek 77-3 Sand Totals Cum Depletion Inventory Monthly Monthly Monthly Monthly Monthly Monthly Monthly Monthly (Prod-Inj) (Primary- Depl Vol) Gas Gas Gas Gas Gas Gas Gas Gas Cum for POZ Total Gas Inj Prod Inj Prod Inj Prod Inj Prod Plotting Inventory Month MCF MCF MCF MCF MCF MCF MCF MCF MCF MCF Jun -04 0 0 2,377,000 Jul -04 0 55,040 55,040 2,321,960 Aug -04 0 194,185 249,225 2,127,775 Sep -04 0 173,352 422,577 1,954,423 Oct -04 0 151,770 574,347 1,802,653 Nov -04 0 161,949 736,296 1,640,704 Dec -04 0 116,582 852,878 1,524,122 Jan -05 0 160,730 1,013,608 1,363,392 Feb -05 0 160,235 1,173,843 1,203,157 Mar -05 0 164,902 1,338,745 1,038,255 Apr -05 0 156,158 1,494,903 882,097 May -05 0 172,327 1,667,230 709,770 Jun -05 0 162,359 1,829,589 547,411 Jul -05 0 157,953 1,987,542 389,458 Aug -05 0 114,531 2,102,073 274,927 Sep -05 0 71,034 2,173,107 203,893 Oct -05 0 113,342 0 2,286,449 90,551 Nov -05 0 53,196 0 20,267 2,359,912 17,088 Dec -05 0 0 224,142 16,950 2,152,720 224,280 Jan -06 0 31,872 22,827 433 2,162,198 214,802 Feb -06 0 17,334 172 0 2,179,360 197,640 Mar -06 0 87,263 24,813 99,300 2,341,110 35,890 Apr -06 0 30,355 0 106,863 2,478,328 -101,328 May -06 0 0 311,189 8 2,167,147 209,853 Jun -06 0 0 12,011 0 2,155,136 221,864 Jul -06 0 863 0 0 0 35,263 2,191,262 185,738 Aug -06 0 131 0 0 331,869 6,215 1,865,739 511,261 Sep -06 0 0 0 0 422,802 0 1,442,937 934,063 Oct -06 110,657 0 1,332,280 1,044,720 Nov -06 83,366 66,196 1,315,110 1,061,890 Dec -06 200,905 12,889 1,127,094 1,249,906 Jan -07 156,326 70,834 1,041,602 1,335,398 Feb -07 106,193 56,748 992,157 1,384,843 Mar -07 54,252 88,933 1,026,838 1,350,162 Apr -07 247,449 0 779,389 1,597,611 May -07 74,062 0 705,327 1,671,673 Jun -07 82,060 0 623,267 1,753,733 Jul -07 39,731 103 583,639 1,793,361 Aug -07 139 0 0 18,925 602,425 1,774,575 Sep -07 134,187 0 0 35,500 503,738 1,873,262 Oct -07 41,803 64 0 0 461,999 1,915,001 Nov -07 0 29,621 0 0 491,620 1,885,380 Dec -07 19,505 171,247 0 35,047 678,409 1,698,591 Jan -08 3,691 227,468 0 228,082 1,130,268 1,246,732 Feb -08 117,547 120,442 0 180,632 1,313,795 1,063,205 Mar -08 239,096 24,957 0 5,280 1,104,936 1,272,064 Apr -08 223,992 12,168 0 5,255 898,367 1,478,633 May -08 212,951 414 0 0 685,830 1,691,170 Jun -08 117,095 0 0 0 568,735 1,808,265 Jul -08 75,423 0 0 0 493,312 1,883,688 Aug -08 44,900 0 0 0 448,412 1,928,588 Sep -08 24,393 448 0 0 424,467 1,952,533 Oct -08 9,943 47,208 0 80,068 541,800 1,835,200 Nov -08 1,267 222,108 0 94,718 857,359 1,519,641 Dec -08 716 223,913 0 312,349 1,392,905 984,095 3/1/2011 Prod inj updated 2-21-11.xls ATTACHMENT #1 SRGSF #3 - PRODUCTION AND INJECTION VOLUMES (TYONEK 77-3 SAND) Month SCU 42A-05 SCU 4213-05 Monthly Monthly Monthly Monthly Gas Gas Gas Gas Inj Prod Inj Prod MCF MCF MCF MCF SCU 42-05X Monthly Monthly Gas Gas Inj Prod MCF MCF SCU 42-05Y Monthly Monthly Gas Gas Inj Prod MCF MCF Tvonek 77-3 Sand Totals Cum Depletion Inventory (Prod-Inj) (Primary- Depl Vol) Cum for POZ Total Gas Plotting Inventory MCF MCF Jan -09 96,694 127,939 0 182,169 1,606,319 770,681 Feb -09 80,773 89,080 0 132,598 1,747,224 629,776 Mar -09 1,687 46,556 0 92,950 1,885,043 491,957 Apr -09 66,627 59 4,052 570 1,814,993 562,007 May -09 348,664 0 383,772 0 1,082,557 1,294,443 Jun -09 162,392 0 188,982 0 731,183 1,645,817 Jul -09 89,080 0 84,826 0 557,277 1,819,723 Aug -09 84,595 0 69,382 0 403,300 1,973,700 Sep -09 65,793 0 36,978 0 300,529 2,076,471 Oct -09 54,863 813 34,950 0 211,529 2,165,471 Nov -09 35,841 62,754 42,943 59,369 254,868 2,122,132 Dec -09 50,849 90,554 2,773 33,242 325,042 2,051,958 Jan -10 9,550 79,221 1,214 45,368 438,867 1,938,133 Feb -10 25 28,296 4,806 101,200 563,532 1,813,468 Mar -10 11,540 98,875 4,021 6,741 653,587 1,723,413 Apr -10 10,452 15,885 53,541 13,200 618,679 1,758,321 May -10 61,614 13,013 44,021 22,748 548,805 1,828,195 Jun -10 53,008 0 59,444 0 436,353 1,940,647 Jul -10 84,197 0 90,557 0 261,599 2,115,401 Aug -10 31,182 0 32,394 0 198,023 2,178,977 Sep -10 5,631 561 1,162 0 191,791 2,185,209 Oct -10 2,257 89 0 0 189,623 2,187,377 Nov -10 480 28,197 1,202 0 216,138 2,160,862 Dec -10 464 150,532 0 39,370 405,576 1,971,424 Jan -11 1 237,373 0 235,022 877,970 1,499,030 Feb -11 0 167017 0 248226 1,293,213 1,083,787 January and February (thru 2/21) 2011 volumes are estimated from daily metered readings 3/1/2011 Prod inj updated 2-21-11.xls ATTACHMENT #2 SRGSF #3 - P/Z VS. CUM PRODUCTION DATA (Tyonel(77-3 Sand) Parameter Value Units Gas Gravity 0.563 3994 Bench Datum 7811 ft (tvd) Datum Temp. 141 °F Datum -Temp. 601 °R Initial Z Guess 0.88 Datum V' .17T'iyl"i�7 J it"i7f U fA 1 [�7 � 1 42A-5 06/27/04 Surf PBU 1 auge 3994 0.9803 4774 0.0000 4870 42A-5 10/22/04 Surf PBU Test Measured 3050 0.9110 Datum 0.5354 4002 42A-5 12/21/04 BHP Static Duration Test Depth Pressure at 0.8933 Pressure, 0.8403 3576 Wellname Date Test Type (hrs) (MTD), ft MTD, psia Z Factor Psia Cum Gas, bcf P/Z, Psia V' .17T'iyl"i�7 J it"i7f U fA 1 [�7 � 1 42A-5 06/27/04 Surf PBU 1 0 3994 0.9803 4774 0.0000 4870 42A-5 10/22/04 Surf PBU 1 0 3050 0.9110 3646 0.5354 4002 42A-5 12/21/04 BHP Static 1 7982 3194 0.8933 3194 0.8403 3576 42A-5 2/8/2005 BHP PBU 8 7982 2482 SITP 0.8859 2926 1.0599 3303 42A-5 06/23/05 BHP PBU 8 7811 1985 0.8835 1985 1.7931 2247 42A-5 07/11/05 SITP 2 0 1565 0.8859 1871 1.8881 2112__ 42A-5 08/25/05 SITP 3 0 1385 0.8923 1655 2.1024 1855 42A-5 09/13/05 ISITP 3 0 1490 0.8883 1781 2.1051 2005 42A-5 10/25/05 JBHP PBU 8 0 11556 0.8959 1556 2.2666 1737 2665 infection %,ycie 42A&B 5 1/4/2006 IBHP Static 142 17811 11857 1 0.8803 1 2232 2.1423 2536 Prnciiirtion Gvcle 42A&B-5 3/10/2006 SITP 4 0 1895 0.8802 2236 2.1633 _ 2540 42A&B-5 3/18/2006 BHP Static 1 7811 2026 0.8827 2026 2.2260 2295 42B-5 4/12/2006 BHP Static 42a- 120 0 1412 0.8911 1689 2.4038 1895 428-5 5/4/2006 SITP 96 0 1280 0.8969 1530 2.4783 1706 lllllh_%llll/ inlPrTion L.vcie 42A&B-5 ,5/17/2006 SITP 48 0 1528 0.8871 1826 2.3799 2058 42A5 6/9/2006 Psuedo SITP 192 0 2010 0.8797 2403 2.1551 2732 _ 42-05X 8/3/2006 SITP/ BHP PBU 15 0 1875 0.8801 2256 2.1976 2563 42-05X 8/24/2006 SITP/BHP PFO 12 0 2400 0.8851 2886 1.9949 3261 42-05X 9/7/2006 SITP 24 0 2826 0.9004 3396 1.7610 3772 42--05X 9/26/2006 SITP 24 0 3347 0.9290 4000 1.4678 4306 42-05X 10/3/2006 SITP 53 0 3312 0.9267 3958 1.4422 4271 42-05X 10/6/2006 SITP 11 0 3309 0.9265 3955 1.4390 4269 42-05X 10/17/2006 SITP 107.5 0 3245 0.9234 3896 1.4127 4219 42-05X 10/20/2006 BHP PFO 8 7794 3241 0.9216 1 3862 1.4015 4191 42-05X 11/8/2006 SITP 31.5 0 3445 0.9358 1 4118 1.2840 4401 42-05X 11/16/2006 SITP 44.5 0 3403 0.9328 1 4067 1.2497 4360 42-05X 1/7/2007 SITP 89 0 3469 0.9374 4146 1.1109 4423 42-05X 4/20/2007 SITP 20 0 3794 0.9626 4534 0.8318 4710 42-05X 5/22/2007 SITP 8 0 3755 0.9583 4473 0.7523 4668 42-05X 8/28/2007 SITP 12 0 3715 0.9561 4440 0.5834 4644 42-05X 11/26/2007 SITP 840 0 3815 0.9644 4560 0.4622 4728 Iln�tf:Jri7inrFlir�liiA�[Flra 42-05X 12/14/2007 SITP 89.5 0 3647 0.9507 4359 0.5166 4585 42-05X 1/4/2008 SITP 31 0 3258 0.9231 3890 0.6896 4214 42-05X 1/23/2008 SITP 7 0 2676 0.8934 3199 0.9690 3581 42-05X 2/8/2008 SITP 10 0 1990 0.8797 2379 1.2923 2704 42-05Y 2/13/2008 SITP 27.3 0 1909 0.8800 2282 1.3859 2593 4665 Inlectlon Cycle 42-05Y 5/16/2008 SITP 124 10 13668 0.9476 4311 0.783 4549 42-05Y 1216 10 13771 0.9552 4427 0.686 4635 _ 3/1/2011\Wnc380ntdfs1.anc380.chevrontexaco.net\share\NAU\MCBU\Alaska\Depts\AssetDev\CIGas\Gas CFT\Openmind\Swanson\Soldotna Creek Unit North\SCU42A-5\Surveys\Pressure\AOGCC Ann Rpt\2010\77-3 Sd POZ 2-24-11.xis ATTACHMENT #2 SRGSF #3 - P/Z VS. CUM PRODUCTION DATA (Tyonek 77-3 Sand) Parameter Value Units Gas Gravity 0.563 3214 Bench Datum 7811 ft (tvd) Datum Temp. 141 °F Datum Temp. 601 °R Initial Z Guess 0.88 3372 42-05Y 7/6/2008 SITP 96 0 3915 0.9663 4587 0.567 4747 42-05Y 9/22/2008 SITP 96 0 3796 0.9571 4455 0.431 4655 42-05Y 10/7/2008 SITP 96 0 3857 0.9618 4523 0.427 4703 Prnrhirfinn r.vrip 42-05X & Y 11/13/2008 SITP 72 0 3214 0.9182 3796 0.660 4134 42-05X & Y 11/30/2008 SITP 24 0 2847 0.8995 3372 0.853 3749 42-05Y 12/8/2008 SITP 96 0 2719 0.8942 3222 0.941 3603 42-05Y 1/14/2009 SITP 24 0 1518 0.8880 1792 1.654 2018 42-05X & Y 1 4/21/2009 SITP 336 0 1799 0.8740 2148 1.886 2458 zuuy injecuon t ycie 42-05X & Y 11/11/2009 JSITP 1192 10 14256 1 0.9922 1 4967 1 0.211 5006 Prnrhirtinn Cvrip 42-05X & Y 12/7/2009 SITP 30 0 4102 0.9808 4808 0.253 _4902 42-05X & Y 1/10/2010 SITP 48 0 3834 0.9604 4512 0.346 4698_ 42-05X & Y 1/19/2010 SITP 48 0 3750 0.9543 4419 0.380 4631 42-05Y 4/10/2010 SITP 288 0 3275 0.9183 3881 0.654 4226 rur ur rrt� rerw un r,s��w ra 42-05X 5/22/2010 SITP 24 0 3544 0.9361 4185 0.597 4470 42-05X & Y 9/1/2010 SITP 24 0 4253 0.9901 4971 0.198 5021 42-05X 9/19/2010 Pres Drawdown 72 0 0.9745 4765 0.194 4890 42-05X & Y 10/21/2010 SITP 552 0 4101 0.9779 4804 0.192 4913 42-05X 11/9/2010 SITP 168 0 14025 1 0.9719 4720 0.190 4856 -zu"I u / Lu"I "I F'roducuon Lgcle 42-05Y 1/4/2011 SITP 124 10 13546 1 0.9363 1 4187 1 0.414 1 4472 3/1/2011\\Anc380ntdfs1.anc380.chevrontexaco.net\share\NAU\MCBU\Alaska\Depts\AssetDev\CIGas\Gas CFT\Openmind\Swanson\Soldotna Creek Unit North\SCU42A-5\Surveys\Pressure\AOGCC Ann Rpt\2010\77-3 Sd POZ 2-24-11.x1s CO `� U x Q N Z N � N c4 Q L a O M X � N _O C O O (y `> Q L U C O O 00 Q v U c U N Ur wg a � C � O 7 Op N cn U N c d g T � N C) (D U U U U U U a � o � o � o LO U cri rn o rn •,C: ao 0o 0) 0) o CO co c a O LO N CL� -v �c (C d � M 3 E ^ o O a Y N / O N >, / / O �- a �► / U LO M � I i LL / co / co t O r LO O / i 0 O O O O O O O O O O co O O O O Cp O LO O O co O N O / eisd `Z/d CO `� U x Q N Z N � N c4 Q L a O M X � N _O C O O (y `> Q L U C O O 00 Q v U c U N Ur wg a � C � O 7 Op N cn U N c d g T � N C) / / / / � I i / / t / i / / i i l I i i