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Home My WebLink About2011 Swanson TyonekHilcorp Alaska, LLC1�� Post Office Box 244027 �'" Anchorage, AK 99524-4027 BAR � VNI �6ssXon coo February 29, 2012 3800 Centerpoint Drive Suite 100 Anchorage, AK 99503 Phone: 907/777-8378 Fax: 907/777-8310 Daniel T. Seamount, Chairman Alaska Oil and Gas Conservation Commission 333 W. 7t" Avenue, Suite 100 Anchorage, AK 99501 Re: 2011 Annual Material Balance Calculations of Production and Iniection Volumes Swanson River Gas Storage Facility #3 (Tvonek 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). 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. The 77-3 reservoir in the Swanson River field was in active use for all of 2011 and was an important component of total gas deliverability for the Cook Inlet. There are two active wells that are used for injection and production — 42-05x and 42-05y. Attached find monthly injection and production data for both wells. Hilcorp has performed material balance calculations on the 77-3 reservoir to provide assurance of continued reservoir confinement of the gas storage volumes. Supporting data is attached in numerical and graphical form for the convenience of the reader. As of December 31, 2011 the estimated reservoir pressure in the 77-3 was approximately 4400 psig as estimated from the attached chart. Notice that one additional shut-in bottom hole pressure measurement was made in July of 2011. This data point is plotted with the rest and conforms to the overall curve, indicating continued confinement of the storage gas. Sincerely, HILC9RP ALASKA, LLC Luke Saugier Reservoir Engineer LS:dma Attachments cc: Kevin Tabler Swanson River Gas Storage Reservoir 77-3 2011 production & injection data SCU 42-05X SCU 42-05Y Monthly Monthly Monthly Monthly Gas Gas Gas Gas Prod Inj Prod Inj Mcf Mcf Mcf Mcf Jan -11 237,113 19 230,251 11,281 Feb -11 217,288 1,482 324,752 Mar -11 117,846 1,928 224,092 1,488 Apr -11 18,730 120,932 52,532 98,254 May -11 0 286,900 0 319,095 Jun -11 0 158,355 0 205,496 Jul -11 0 133,899 16 144,240 Aug -11 2 85,917 453 76,836 Sep -11 27,486 38,289 21,995 22,919 Oct -11 6,211 7,367 13,309 37,276 Nov -11 168,468 0 136,502 44,720 Dec -11 110,795 0 24,639 166,833 Swanson River Gas Storage Reservoir 77-3 Well Section Zone Depth Date BHP Cum z P/z 42A-5 5 77-3 7982 6/27/2004 4540 0 0.9783 4640 42A-5 5 77-3 7982 12/21/2004 3194 815 0.9108 3507 42A-5 5 77-3 7978 2/8/2005 2928 1014 0.9027 3244 42A-5 5 77-3 7977 10/26/2005 1563 2268 0.9043 1728 4213-5 5 77-3 7868 11/11/2005 1510 2313 0.9060 1667 42A-5 5 77-3 7977 1/4/2006 2240 2153 0.8936 2507 428-5 5 77-3 7755 1/4/2006 2234 2153 0.8936 2500 42A-5 5 77-3 7977 2/19/2006 2162 2174 0.8938 2419 4213-5 5 77-3 7867 2/19/2006 2164 2174 0.8938 2421 42A-5 5 77-3 7977 3/18/2006 2026 2273 0.8944 2265 4213-5 5 77-3 7868 3/18/2006 2051 2273 0.8944 2293 42A-5 5 77-3 7977 4/7/2006 1603 2373 0.9031 1775 4213-5 5 77-3 7867 4/7/2006 1578 2373 0.9031 1747 4213-5 5 77-3 7868 6/1/2006 2518 2167 0.8948 2814 42A-5 5 77-3 7977 6/2/2006 2495 2167 0.8948 2788 42-05x 5 77-3 7890 8/3/2006 2270 2191 0.8936 2540 42-05Y 5 77-3 7852 9/7/2007 4218 602 0.9591 4398 42-05Y § 77-3 7845 7/12/2011 5027 345 1.0099 4978 N O n 00 n I` O O c- to M Lo 1` -,T w O w 00 W CD CD n t�ptgNn(OtoLo NNNtitic0�LOMm N N N N N <- — N N N V' V' N M W n M O CO (D W OD q r- W M (D _ O n 0 0 d M O M M M M O OM M M O M O W C7 Q1 07 07 00 O CO M a0 ao O) O 00 M 00 O O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 �- E M M V T M M M M r- r— N M P P (D P tO to r- Imo- n r- I` I-- CCI (O m O tO U W O N M — r- -- N N (M M — P N N N N N N N ... N N N O M (L O 4T M M O O CT N V CCI — CO M M LO O M r. _ eT M N O P V M CCI 0 NLo O I` CP Cy to P O M to N N O O O �? � N N O m M N P P N N N N N N N N N �T LO N �7 of YY In N (D (O CO O O O (O CO (O O O r .- 0 0 0 0 0 0 0 0a 0 0 0 0 CD 0 0 0 0 N N N N N N N N N N ..... 00 N N N 00 NN N ` V'� 0000OCC NOMC w� N 1• � CN� m V O 00 41 t0 N N N Cl) M r, P P P UO r` r- I-- w P- I` w I- O N (n C) OD OO n n CD r- to tl- (O CO ti (D (0 1,- m tf) 'IT rO M M Cf) M 00 M 0 n n n n n r` r` r` r` r- r` ` r` n r` r- N M M M M M M M co M M M M M M M M M M I` P�- r-� I` t� I-� N n n n n n r- r- t- I- r I- r- t`. r, r. r_ r- r - c w 0 w w N u') LO LO tO LO LO (n (n N to LO LO (O 0 U N CO N W N W W W to to L() LO to LO to (n to tr) X } } Q Q Q Q m Q m Q m Q m Q m m Q O O LO O N N N IT IT 0 0 0 0 a L o Qi .W) I 00 fa = m 3 aL u O V ♦ ■ _m m m L M L L H tko L N L O N C m 3 IA 0 0 0 0 a L o