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Home My WebLink About2001 Swanson KGSFUnocal Alaska Union Oil Company of Cau,urnia 909 West 9th Avenue, P.O. Box 196247 Anchorage, Alaska 99519-6247 Telephone (907) 276-7600 UNOCAL " - July 31, 2002 Commissioners: Ms. Julie Heusser Mr. Dan Seamount Ms. Camille Oechsli Taylor 333 W. 7th Avenue, Suite 100 Anchorage, AK 99501-3539 Re: ANNUAL MATERIAL BALANCE CALCULATIONS OF PRODUCTION AND INJECTION VOLUMES FOR KGSF #1, SL^IANSON RIVER FIELD Dear Commissioners: Attached for your review is the first annual material balance calculation of production and injection volumes for KGSF #1, as required per Storage Injection Order #2. This material balance covers the primary production period, as well as the June 15, 2001 through June 30, 2002 storage operation period. Attachment #1 is a table of gas production and injection volumes for the KGSF #1 well beginning with the commencement of primary production through the first year of storage operations, ending with the data for June 2002. Reservoir pressure estimates were obtained through surface shut-in tubing pressure readings which were converted to bottomhole pressures. These data points are tabulated in attachment #2 and plotted on the standard POZ plot in attachment #3. The plot demonstrates continued reservoir confinement of the gas storage volumes. Note that the injection cycle pressures deviate above the straight line path established with the primary depletion points; as expected. This is a common effect seen in constant -volume gas storage reservoirs. Please contact me at 263-7622 if you have any questions regarding these calculations. Sincerely, qff'sm. etanka Advising Reservoir Engineer ATTACHMENT #1 - KGSF #1 PRODUCTION AND INJECTION VOLUMES All Gas volumes calculated at 14.65 psi pressure base (Prod - Inj) Gas Monthly Cum Monthly Cum Cum for Total Rate Gas Gas Gas Gas POZ Gas (CD) Prod Prod Inj Inj plotting Inventory DATE Mcf/d Mcf Mcf Mcf Mcf ------------- Mcf ------------- Mcf -- -------------------- ----------------------- ---------- 1,338,562 Dec -98 1,779 55,137 55,137 - - 55,137 1,283,425 Jan -99 2,561 79,404 134,541 - - 134,541 1,204,021 Feb -99 2,299 64,367 198,908 - - 198,908 1,139,654 Mar -99 2,385 73,920 272,828 - - 272,828 1,065,734 Apr -99 2,073 62,180 335,008 - - 335,008 1,003,554 May -99 2,481 76,912 411,920 - - 411,920 926,642 Jun -99 2,563 76,903 488,823 - - 488,823 849,739 Jul -99 2,331 72,268 561,091 - - 561,091 777,471 Aug -99 1,946 60,311 621,402 - - 621,402 717,160 Sep -99 1,622 48,667 670,069 - - 670,069 668,493 Oct -99 1,357 42,056 712,125 - - 712,125 626,437 Nov -99 1,313 39,385 751,510 - - 751,510 587,052 Dec -99 1,090 33,783 785,293 - - 785,293 553,269 Jan -00 1,287 39,890 825,183 - - 825,183 513,379 Feb -00 721 20,895 846,078 - - 846,078 492,484 Mar -00 1,233 38,219 884,297 - - 884,297 454,265 Apr -00 1,191 35,729 920,026 - - 920,026 418,536 May -00 726 22,502 942,528 - - 942,528 396,034 Jun -00 288 8,627 951,155 - - 951,155 387,407 Jul -00 981 30,397 981,552 - - 981,552 357,010 Aug -00 1,828 56,660 1,038,212 - - 1,038,212 300,350 Sep -00 1,017 30,505 1,068,717 - - 1,068,717 269,845 Oct -00 946 29,330 1,098,047 - - 1,098,047 240,515 Nov -00 1,621 48,633 1,146,680 - - 1,146,680 191,882 Dec -00 959 29,741 1,176,421 - - 1,176,421 162,141 Jan -01 1,491 46,236 1,222,657 - - 1,222,657 115,905 Feb -01 1,706 47,777 1,270,434 - - 1,270,434 68,128 Mar -01 1,200 37,213 1,307,647 - - 1,307,647 30,915 Apr -01 824 24,719 1,332,366 - - 1,332,366 6,196 May -01 200 6,196 1,338,562 - - 1,338,562 - Jun -01 - - 1,338,562 106,800 106,800 1,231,762 106,800 Jul -01 - - 1,338,562 219,660 326,460 1,012,102 326,460 Aug -01 - - 1,338,562 226,151 552,611 785,951 552,611 Sep -01 - - 1,338,562 197,762 750,373 588,189 750,373 Oct -01 1,948 60,382 1,398,944 44,964 795,337 603,607 734,955 Nov -01 4,747 142,418 1,541,362 73,130 868,467 672,895 665,667 Dec -01 5,131 159,046 1,700,408 28,281 896,748 803,660 534,902 Jan -02 1,540 47,741 1,748,149 134,429 1,031,177 716,972 621,590 Feb -02 2,336 65,400 1,813,549 102,768 1,133,945 679,604 658,958 Mar -02 145 4,507 1,818,056 250,716 1,384,661 433,395 905,167 Apr -02 1,701 51,031 1,869,087 107,164 1,491,825 377,262 961,300 May -02 521 16,147 1,885,234 89,218 1,581,043 304,191 1,034,371 Jun -02 129 3,868 1,889,102 106,081 1,687,124 201,978 1,136,584 At 7/12/02 1,716 1,890,818 13,458 1,700,582 190,236 1,148,326 At 7/26/02 11,601 1,900,703 13,458 1,700,582 200,121 1,138,441 ] 0 \ \ \ e j e \ / e,7 / \ U Q z= z z E/kE & \ \ \ \\ f 3 R c o 0 0 0 N / / Q 7 & 3 $ 2 z in r % 5 \ / \ \ \ \ z U \ p P. 2 Z g < � \ 0 n # = G Q \ / 110 * ®2 \ = E R R Q z= m z - % p o o c 0 0 0 0 . 0 . 0 . 0 / / \ e e / / \ E/kE \ \ \ \ z \ p P. 2 Z g & n # = G Q 110 \ \ \ \ \ \ R 3 K 3 0 0 0 0 . 0 . 0 . 0 / \ \ \ \ \ \ y 7 / / / / 7 77 77 77 \ \ / \ 6 6 6 o y 5 c c o 0 0 0= \ \ U U \ \ \ \ \ \ \ \ \ N 0 M N 0 0 0 0 0 0 0 0 0 0 M O N O O tr) isd Izod \4F NO O/ u / ^C ` o , N 0 0 0 0 0 0 0 0 0 0 M O N O O tr) isd Izod \4F NO