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2015 Swanson Tyonek
Hilcorp Alaska, LLC 11 March 3, 2016 MAR 0 4 2016 AOGCC Mrs. Cathy Foerster, Chair Alaska Oil and Gas Conservation Commission 333 W. 7th Avenue, Suite 100 Anchorage, AK 99501 Post Office Box 244027 Anchorage, AK 99524-4027 3800 Centerpoint Drive Suite 100 Anchorage, AK 99503 Phone: 907/777-8378 Fax: 907/777-8310 Re: 2015 Annual Material Balance Calculations of Production and Infection Volumes — Swanson River Gas Storage Facility 93 (Tyonek 77-3 sand) Swanson River Field Dear Commissioner Foerster: 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 46). 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 2015 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 — SCU 42-05X and SCU 42-05Y. 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 14, 2015 the estimated reservoir pressure in the 77-3 was approximately 2,700 psia as estimated from the attached chart. Notice that seventeen BHP calculations were made for the 2015 storage cycle between January and December. These were in addition to two bottom -hole SI pressures take in January and August. These data points are plotted with the historical data and they conform to the overall curve, indicating continued confinement of the storage gas. Sincerely, HILCORP ALASI LC Daniel Taylor Reservoir Engineer Attachments: 1) Tyonek 77-3 P/Z Data 2) Tyonek 77-3 P/Z vs Cumulative Production Plot ATTACHMENT #1 -- SRGSF POZ DATA (Tyonek 77-3 Sand) Parameter Value Units Gas Gravity 0.563 3994 Bench Datum 7811 ft (tvd) Datum Temp. 141 °F Avg Temp. 77 of OH -- MD OH --ND Top 7972 7806 midperf 7977 7811 Bottom 7982 7816 Primary Production 42A-5 06/27/04 Surf PBU 1 Gauge 3994 0.9803 tum 0.0000 4870 Wellname Date Test Type Duration Measured Pressure at Z Factor Pressure, Cum Gas, bcf P/Z, Psia 42A-5 12/21/04 BHP Static (hrs) Test Depth MTD, psia 0.8933 Psia 0.8403 3576 42A-5 2/8/2005 BHP PBU 8 MTD ft 2482(SITP) 0.8859 2926 1.0599 3303 Primary Production 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 ISITP 3 0 1385 0.8923 1655 2.1024 1855 42A-5 09/13/05 ISITP 3 0 11490 0.8883 1 1781 1 2.1051 2005 42A-5 10/25/05 1 BHP PBU 8 7811 11556 1 0.8959 1 1556 1 2.2666 1737 2005 Injection C cle 42A&B-5 1 1/4/2006 JBHP Static 142 17811 11857 0.8803 1 2232 1 2.1371 1 2535 2006 Production Cvcle 42A&B-5 3/10/2006 SITP 4 0 1895 0.8802 2236 2.1166 2540 42A&B-5 3/18/2006 BHP Static 1 7811 2026 0.8827 2026 2.1793 2295 42B-5 4/12/2006 Surf PBU 42b-5, BHP Static 42a-05 120 0 1412 0.8911 1689 2.3533 1895 4213-5 1 5/4/2006 SITP 96 0 1280 1 0.8969 1530 2.4245 1706 2006-2007 Iniection Cvcle 42A&B-5 5/17/2006 SITP 48 0 1528 0.8871 1826 2.3406 2058 42A5 5/21/2006 Psuedo SITP 0 0 1700 0.8801 2031 2.2750 2308 42A5 6/9/2006 Psuedo SITP 192 0 2010 0.8794 2403 2.1013 2733 42-05X 8/3/2006 SITP/ BHP PBU 15 0 1875 0.8801 2256 2.1420 2563 42-05X 8/24/2006 SITP/BHP PFO 12 0 2400 0.8851 2886 1.9311 3261 42-05X 9/7/2006 SITP 24 0 2826 0.9004 3396 1.6956 3772 42-05X 9/26/2006 SITP 24 0 3347 0.9290 4000 1.4109 4306 42-05X 10/3/2006 SITP 53 0 3312 0.9267 3958 1.3853 4271 42-05X 10/6/2006 SITP 11 0 3309 0.9265 3955 1.3781 4269 42-05X 10/17/2006 SITP 107.5 0 3245 1 0.9234 3896 1.3564 4219 42-05X 10/20/2006 BHP PFO 8 7794 3241 0.9216 3862 1.3440 4191 42-05X 11/8/2006 SITP 31.5 0 3445 0.9358 4118 1.2292 4401 42-05X 11/16/2006 SITP 44.5 0 3403 0.9328 4067 1.2017 4360 42-05X 12/3/2006 SITP 146.3 0 3119 0.9583 3728 1.2614 3890 42-05X 1/7/2007 SITP 89 0 3469 0.9374 4146 1.0622 4423 42-05X 4/20/2007 SITP 20 0 3794 0.9626 4534 0.7819 4710 42-05X 5/22/2007 SITP 8 0 3755 0.9583 4473 0.6981 4668 42-05X 8/28/2007 SITP 12 0 3715 0.9561 4440 0.5362 4644 42-05X 11/26/2007 SITP 1840 0 3815 0.9644 4560 0.4058 4728 2008 Production Cvcle 42-05X 12/14/2007 SITP 89.5 0 3647 0.9507 4359 0.4640 4585 42-05X 1/4/2008 SITP 31 0 3258 0.9231 3890 0.6221 4214 42-05X 1/23/2008 SITP 7 0 2676 0.8934 3199 0.9051 3581 42-05X 2/8/2008 SITP 10 0 1990 0.8797 2379 1.2354 2704 42-05Y 2/13/2008 SITP 27.3 0 1909 0.8800 2282 1.3153 2593 2008 Injection Cycle 42-05X 5/16/2008 SITP 24 0 3668 0.9476 4311 0.7183 4549 42-05X 6/6/2008 SITP 216 0 3771 0.9552 4427 0.6227 4635 42-05X 7/6/2008 SITP 96 0 3915 0.9663 4587 0.5028 4747 42-05X 9/22/2008 SITP 96 0 3796 0.9571 4455 0.3698 4655 42-05Y 10/7/2008 SITP 96 0 3857 0.9618 4523 0.3667 4703 2008/2009 Production Cycle 42-05X 11/13/2008 SITP 72 0 3214 0.9182 3796 0.5991 4134 42-05X 11/30/2008 SITP 24 0 2847 0.8995 3372 0.7908 3749 42-05X 12/8/2008 SITP 96 0 2719 0.8942 3222 0.8756 3603 42-05X 1/14/2009 SITP 24 0 1518 0.8880 1792 1.5812 2018 42-05Y 4/21/2009 SITP 336 0 1799 0.8740 2148 1.8027 2458 2009 Injection C cle 42-05X 1 11/11/2009 ISITP 192 10 14256 1 0.9922 1 4967 1 0.1367 15006 2009/2010 Production Cycle 42-05X 12/7/2009 SITP 30 0 3834 0.9808 4808 0.1798 4902 42-05X 1/10/2010 SITP 48 0 3750 0.9604 4512 0.2776 4698 42-05X 1/19/2010 SITP 48 0 3275 0.9543 4419 0.3122 4631 42-05X 4/10/2010 SITP 288 0 3544 0.9183 3881 0.5812 4226 2010 Injection Cycle 42-05X 5/22/2010 SITP 24 0 3544 0.9361 4185 0.5215 4471 42-05X 9/1/2010 SITP 24 0 4253 0.9901 4971 0.1269 5021 42-05X 9/19/2010 SITP 72 0 1.4721 0.9745 4765 0.1227 4890 42-05X 10/21/2010 SITP 552 0 4101 0.9779 4804 0.1203 4913 42-05Y 11/9/2010 SITP 168 0 4025 0.9719 4720 0.1181 4856 luiuiluii Nroaucuonc cie 42-05X 1 1/4/2011 ISITP 124 10 13546 1 0.9363 1 4187 0.3263 1 4472 42-05XY 1 3/1/2011 ISITP I I 1 1 0.8670 1 1578 1 1.3387 1 1820 2011 Injection Cycle 42-05XY 1 10/30/2011 ISITP 0.9945 1 5057 0.1331 5085 2012 Storage 42-05X 5/31/2012 SITP/ BHP PBU 192 7811 2448 0.8219 2448 1.4721 2978 42-05X 8/7/2012 SITP 0 2195 0.8923 2604 1.5031 2918 42-05Y 8/7/2012 SITP 0 2185 0.8922 2592 1.5031 2905 42-05X 9/22/2012 SITP 0 2541 0.9014 3013 1.3469 3343 42-05Y 9/22/2012 SITP 0 2553 0.9018 3027 1.3469 3357 42-05X 10/21/2012 SITP 0 3165 0.9304 3737 1.0322 4017 42-05Y 10/21/2012 SITP 0 3155 0.9298 3726 1.0322 4007 2013 Storage 42-05X 4/12/2013 SITP 0 3661 0.96047 4303 0.9806 4480 42-05X 5/18/2013 SITP 0 3425 0.94511 4037 0.7394 4271 42-05Y 5/18/2013 SITP 0 3427 0.94522 4039 0.7394 4273 42-05X 8/17/2013 SITP 0 3801 0.97011 4461 0.3172 4598 42-05Y 8/17/2013 SITP 0 3806 0.97048 4467 0.3172 4603 42-05X 9/7/2013 SITP 0 3748 0.9664 4401 0.3005 4554 42-05Y 10/27/2013 SITP 0 3929 0.97912 4604 0.1788 4702 2014 Storage 42-05X 10/30/2013 SITP 0 3939.7 0.9844495 4,615 0.1751 4687 42-05X 4/14/2014 SITP 0 3577.7 0.9486947 4,208 0.2911 4435 42-05Y 5/14/2014 SITP 0 3445.7 0.9373886 4,059 0.2914 4330 42-05X 6/10/2014 SITP 0 3363.7 0.9308376 3,966 0.3226 4261 42-05Y 7/31/2014 SITP 0 3327.7 0.9280766 3,925 0.2979 4229 42-05Y 8/5/2014 SITP 0 3357.7 0.9303726 3,959 0.2902 4255 42-05Y 9/6/2014 SITP 0 2955.7 0.9037063 3,501 0.3952 3874 42-05Y 9/28/2014 SITP 0 3119.7 0.9135099 3,688 0.3912 4038 42-05Y 10/1/2014 SITP 0 3014.7 0.9070611 3,569 0.3997 3934 42-05Y 10/5/2014 SITP 0 2873.7 0.8993665 3,407 0.4413 3788 42-05X 11/2/2014 SITP 0 2723.7 0.8924065 3,235 0.5348 3625 42-05X 12/2/2014 SITP 0 2656.7 0.8897095 3,158 0.5941 3549 42-05X 12/31/2014 SITP 0 2633.7 0.8888426 3,131 0.6378 3523 2015 Storage 42-05X 1/9/2015 BHP 7896 3206 0.8913932 3,207 0.6441 3598 42-05X 1/21/2015 SITP 0 2694.7 0.8912078 3,202 0.6111 3592 42-05X 2/23/2015 SITP 0 2688.7 0.8909658 3,195 0.6607 3586 42-05X 5/1/2015 SITP 0 2449.7 0.8829988 2,919 0.8274 3305 42-05X 5/13/2015 SITP 0 2422.7 0.8823055 2,887 0.8415 3273 42-05X 6/1/2015 SITP 0 12583.7 0.8870623 3,074 0.8094 3465 42-05X 6/14/2015 SITP 0 2594.7 0.8874417 3,086 0.8174 3478 42-05X 6/28/2015 SITP 0 2594.7 0.8874417 3,086 0.8181 3478 42-05X 7/12/2015 SITP 0 2530.7 0.8853316 3,012 0.8468 3403 42-05X 7/20/2015 SITP 0 2513.7 0.8848106 2,993 0.8602 3382 42-05X 8/5/2015 SITP 0 2448.7 0.8829724 2,918 0.8928 3304 42-05X 8/14/2015 SITP 0 2514.7 0.8848408 2,994 0.8811 3384 42-05X 8/22/2015 BHP 7910 2942 0.8835421 2942 0.9147 3330 42-05X 9/3/2015 SITP 0 2394.7 0.8816311 2,855 0.9322 3238 42-05X 9/28/2015 SITP 0 2380.7 0.8813109 2,839 0.9541 3221 42-05X 10/4/2015 SITP 0 2368.7 0.8810455 2,825 0.9636 3206 42-05X 11/13/2015 SITP 0 2048.7 0.8770805 2,452 1.1546 2796 42-05X 11/18/2015 ISITP 10 2095.7 0.8772847 2,507 1.1886 2858 42-05X 12/14/2015 ISITP 10 12254.7 0.8789433 2,693 1.0992 3063
