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2022 Pretty Creek
Hilcorp Alaska, LLC March 3, 2023 Mrs. Jessie Chmielowski, Commissioner Alaska Oil and Gas Conservation Commission 333 W. 7th Avenue, Suite 100 Anchorage, AK 99501 Re: 2021 Annual Material Balance Calculations Pretty Creek Gas Storage Facility, Pretty Creek Unit #4 Dear Commissioner Chmielowski: Attached for your review is the 2022 “Annual Performance Report” for the Pretty Creek Gas Storage Facility (PCU #4), as required per AOGCC Storage Injection Order #4 (SIO #4). This material balance report covers the primary production period through the 2022 gas storage operations. The 51-5 gas storage reservoir was in active use for all of 2022 and was an important component of total gas deliverability for the Cook Inlet. There is one active well that is used for injection and production – Pretty Creek Unit #4 (aka PCU #4). Attached find injection and production data for 2022. Hilcorp has performed material balance calculations on the 51-5 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. All production and injection cycles performed in 2022 consistently match the historical P/Z trend established by past performance of this reservoir. Sincerely, Daniel Taylor Reservoir Engineer, P.E. 143467 Attachments: 1) 51-5 P/Z Data 2) 51-5 P/Z vs Cumulative Production Plot Post Office Box 244027 Anchorage, AK 99524-4027 3800 Centerpoint Drive Suite 100 Anchorage, AK 99503 Jennifer.starck@hilcorp.com Phone: 907/777-8497 Fax: 907/777-8310 Year Month Reservoir Gas InjGas InjLessGas WELL_NAME DATE_TIME TbgPress TP_Date GIP (MMCF) Pz Gp (BCF) 2006 8 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 8/31/2006 954 8/31/2006 1220.54 1343.31 0.83 2006 9 BG.51-5_ST.45-0 0.0 159.6 159.6 PC 4 9/30/2006 970 9/6/2006 1380.15 1370.85 0.67 2007 3 BG.51-5_ST.45-0 47.0 67.9 20.9 PC 4 3/31/2007 2174 3/16/2007 1841.16 3364.45 0.21 2008 1 BG.51-5_ST.45-0 88.2 0.0 -88.2 PC 4 1/31/2008 2247 1/1/2008 2073.85 3480.32 -0.02 2010 11 BG.51-5_ST.45-0 162.9 32.7 -130.3 PC 4 11/30/2010 3053 11/10/2010 2772.40 4721.59 -0.72 2012 11 BG.51-5_ST.45-0 116.3 20.5 -95.7 PC 4 11/30/2012 1394 11/14/2012 2242.54 2090.68 -0.19 2013 1 BG.51-5_ST.45-0 37.6 38.6 1.0 PC 4 1/31/2013 1264 1/24/2013 2050.98 1872.03 0.00 2013 2 BG.51-5_ST.45-0 107.5 0.2 -107.3 PC 4 2/28/2013 1242 2/5/2013 1943.65 1834.85 0.11 2013 5 BG.51-5_ST.45-0 0.0 90.0 90.0 PC 4 5/31/2013 1348 5/19/2013 2185.36 2013.52 -0.13 2013 6 BG.51-5_ST.45-0 0.0 5.1 5.1 PC 4 6/30/2013 1356 6/30/2013 2190.51 2026.95 -0.14 2013 7 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 7/31/2013 1360 7/31/2013 2190.51 2033.67 -0.14 2013 8 BG.51-5_ST.45-0 0.0 3.2 3.2 PC 4 8/31/2013 1360 8/31/2013 2193.70 2033.67 -0.14 2013 9 BG.51-5_ST.45-0 0.0 13.3 13.3 PC 4 9/30/2013 1370 9/30/2013 2206.99 2050.45 -0.15 2013 10 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 10/31/2013 1370 10/31/2013 2206.99 2050.45 -0.15 2013 11 BG.51-5_ST.45-0 48.3 0.0 -48.3 PC 4 11/30/2013 1335 11/28/2013 2158.72 1991.67 -0.10 2013 12 BG.51-5_ST.45-0 101.9 0.0 -101.9 PC 4 12/31/2013 1265 12/31/2013 2056.78 1873.72 0.00 2014 1 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 1/31/2014 1290 1/31/2014 2056.78 1915.91 0.00 2014 2 BG.51-5_ST.45-0 45.4 0.0 -45.4 PC 4 2/28/2014 1262 2/28/2014 2011.34 1868.65 0.04 2014 3 BG.51-5_ST.45-0 11.1 69.7 58.6 PC 4 3/31/2014 1262 3/14/2014 2069.90 1868.65 -0.01 2014 4 BG.51-5_ST.45-0 0.0 2.1 2.1 PC 4 4/30/2014 1312 4/30/2014 2072.01 1952.97 -0.02 2014 5 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 5/31/2014 1314 5/31/2014 2072.01 1956.34 -0.02 2014 6 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 6/30/2014 1312 6/30/2014 2072.01 1952.97 -0.02 2014 7 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 7/31/2014 1315 7/31/2014 2072.01 1958.02 -0.02 2014 8 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 8/31/2014 1317 8/31/2014 2072.01 1961.39 -0.02 2014 9 BG.51-5_ST.45-0 1.6 0.0 -1.6 PC 4 9/30/2014 1317 9/29/2014 2070.38 1961.39 -0.02 2014 10 BG.51-5_ST.45-0 102.6 0.0 -102.6 PC 4 10/31/2014 1242 10/31/2014 1967.82 1834.85 0.09 2014 11 BG.51-5_ST.45-0 2.3 77.7 75.4 PC 4 11/30/2014 1250 11/11/2014 2043.19 1848.38 0.01 2014 12 BG.51-5_ST.45-0 0.0 79.5 79.5 PC 4 12/31/2014 1365 12/31/2014 2122.67 2042.06 -0.07 2015 1 BG.51-5_ST.45-0 13.0 0.0 -13.0 PC 4 1/31/2015 1356 1/25/2015 2109.67 2026.95 -0.05 2015 2 BG.51-5_ST.45-0 23.3 0.0 -23.3 PC 4 2/28/2015 1330 2/28/2015 2086.37 1983.26 -0.03 2015 3 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 3/31/2015 1335 3/31/2015 2086.37 1991.67 -0.03 2015 4 BG.51-5_ST.45-0 86.3 0.0 -86.3 PC 4 4/30/2015 855 4/29/2015 2000.08 1172.29 0.05 2015 5 BG.51-5_ST.45-0 43.0 31.2 -11.9 PC 4 5/31/2015 1255 5/24/2015 1988.22 1856.83 0.07 2015 6 BG.51-5_ST.45-0 35.8 65.7 29.9 PC 4 6/30/2015 1303 6/30/2015 2018.07 1937.82 0.04 2015 7 BG.51-5_ST.45-0 11.4 9.8 -1.6 PC 4 7/31/2015 1307 7/29/2015 2016.43 1944.55 0.04 2015 8 BG.51-5_ST.45-0 25.2 6.7 -18.4 PC 4 8/31/2015 1298 8/31/2015 1997.99 1929.39 0.06 2015 9 BG.51-5_ST.45-0 54.1 38.3 -15.8 PC 4 9/30/2015 1251 9/23/2015 1982.19 1850.07 0.07 2015 11 BG.51-5_ST.45-0 60.2 63.1 2.9 PC 4 11/30/2015 1172 11/23/2015 1845.96 1716.20 0.21 2015 12 BG.51-5_ST.45-0 14.4 54.1 39.7 PC 4 12/31/2015 1246 12/31/2015 1885.65 1841.61 0.17 2016 1 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 1/31/2016 1242 1/31/2016 1885.65 1834.85 0.17 2016 2 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 2/28/2016 1245 2/29/2016 1885.65 1839.92 0.17 2016 3 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 3/31/2016 1248 3/31/2016 1885.65 1844.99 0.17 2016 4 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 4/30/2016 1252 4/30/2016 1885.62 1851.76 0.17 2016 5 BG.51-5_ST.45-0 0.0 33.4 33.4 PC 4 5/31/2016 1252 5/24/2016 1919.07 1851.76 0.14 2016 8 BG.51-5_ST.45-0 8.5 66.5 58.0 PC 4 8/31/2016 1465 8/31/2016 2245.73 2209.33 -0.19 2016 9 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 9/30/2016 1450 9/30/2016 2245.73 2184.31 -0.19 2016 10 BG.51-5_ST.45-0 35.7 0.0 -35.7 PC 4 10/31/2016 1411 10/31/2016 2210.01 2119.14 -0.15 2016 11 BG.51-5_ST.45-0 21.0 0.0 -21.0 PC 4 11/30/2016 1416 11/25/2016 2189.04 2127.50 -0.13 2016 12 BG.51-5_ST.45-0 156.6 0.0 -156.6 PC 4 12/31/2016 1302 12/31/2016 2032.48 1936.13 0.02 2017 2 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 2/28/2017 1310 2/28/2017 2012.67 1949.61 0.04 2017 3 BG.51-5_ST.45-0 0.0 138.7 138.7 PC 4 3/31/2017 1308 3/3/2017 2151.34 1946.24 -0.10 2017 4 BG.51-5_ST.45-0 0.0 31.3 31.3 PC 4 4/30/2017 1420 4/30/2017 2182.62 2134.19 -0.13 2017 5 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 5/31/2017 1414 5/31/2017 2182.62 2124.16 -0.13 2017 6 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 6/30/2017 1410 6/30/2017 2182.62 2117.46 -0.13 2017 7 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 7/31/2017 1406 7/31/2017 2182.58 2110.77 -0.13 2017 8 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 8/31/2017 1401 8/31/2017 2182.58 2102.40 -0.13 2017 9 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 9/30/2017 1400 9/30/2017 2182.58 2100.73 -0.13 2017 10 BG.51-5_ST.45-0 1.2 0.0 -1.2 PC 4 10/31/2017 1400 10/30/2017 2181.36 2100.73 -0.13 2017 11 BG.51-5_ST.45-0 8.0 0.0 -8.0 PC 4 11/30/2017 1391 11/30/2017 2173.39 2085.65 -0.12 2017 12 BG.51-5_ST.45-0 3.6 0.0 -3.6 PC 4 12/31/2017 1257 12/31/2017 2169.80 1860.21 -0.11 2018 1 BG.51-5_ST.45-0 12.1 0.0 -12.1 PC 4 1/31/2018 1380 1/31/2018 2157.71 2067.22 -0.10 2018 2 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 2/28/2018 1385 2/28/2018 2157.71 2075.60 -0.10 2018 3 BG.51-5_ST.45-0 121.4 0.9 -120.5 PC 4 3/31/2018 1277 3/31/2018 2037.21 1893.98 0.02 2018 4 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 4/30/2018 1310 4/30/2018 2037.25 1949.61 0.02 2018 5 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 5/31/2018 1320 5/31/2018 2037.25 1966.44 0.02 2018 6 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 6/30/2018 1323 6/30/2018 2037.25 1971.49 0.02 2018 7 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 7/31/2018 1324 7/31/2018 2037.25 1973.17 0.02 2018 8 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 8/31/2018 1321 8/31/2018 2037.25 1968.12 0.02 2018 9 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 9/30/2018 1332 9/30/2018 2037.25 1986.63 0.02 2018 10 BG.51-5_ST.45-0 0.0 9.1 9.1 PC 4 10/31/2018 1338 10/31/2018 2046.36 1996.71 0.01 2018 11 BG.51-5_ST.45-0 9.2 0.0 -9.2 PC 4 11/30/2018 1338 11/29/2018 2037.15 1996.71 0.02 2018 12 BG.51-5_ST.45-0 60.5 0.0 -60.5 PC 4 12/31/2018 1290 12/31/2018 1976.62 1915.91 0.08 2019 1 BG.51-5_ST.45-0 53.5 0.0 -53.5 PC 4 1/31/2019 1115 1/31/2019 1923.12 1619.19 0.13 2019 2 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 2/28/2019 1125 2/28/2019 1923.12 1636.24 0.13 2019 3 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 3/31/2019 1268 3/31/2019 1923.12 1878.78 0.13 2019 4 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 4/30/2019 1266 4/30/2019 1923.12 1875.41 0.13 2019 5 BG.51-5_ST.45-0 0.0 6.8 6.8 PC 4 5/31/2019 1279 5/31/2019 1929.93 1897.35 0.13 2019 6 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 6/30/2019 1277 6/30/2019 1929.93 1893.98 0.13 2019 7 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 7/31/2019 1277 7/31/2019 1929.93 1893.98 0.13 2019 8 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 8/31/2019 1277 8/31/2019 1929.93 1893.98 0.13 2019 9 BG.51-5_ST.45-0 33.7 33.3 -0.4 PC 4 9/30/2019 1254 9/19/2019 1929.49 1855.14 0.13 2019 10 BG.51-5_ST.45-0 10.6 1.6 -9.0 PC 4 10/31/2019 1268 10/31/2019 1920.53 1878.78 0.13 2019 11 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 11/30/2019 1281 11/30/2019 1920.53 1900.73 0.13 2019 12 BG.51-5_ST.45-0 78.1 0.0 -78.1 PC 4 12/31/2019 1220 12/31/2019 1842.39 1797.62 0.21 2020 1 BG.51-5_ST.45-0 158.0 0.0 -158.0 PC 4 1/31/2020 1127 1/22/2020 1684.38 1639.64 0.37 2020 2 BG.51-5_ST.45-0 133.0 0.0 -133.0 PC 4 2/28/2020 983 2/28/2020 1551.35 1393.21 0.50 2020 3 BG.51-5_ST.45-0 121.1 0.0 -121.1 PC 4 3/31/2020 984 3/13/2020 1430.22 1394.93 0.62 2020 4 BG.51-5_ST.45-0 34.8 97.7 62.9 PC 4 4/30/2020 845 4/5/2020 1493.15 1154.96 0.56 2020 6 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 6/30/2020 1135 6/30/2020 1653.65 1653.27 0.40 2020 7 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 7/31/2020 1136 7/31/2020 1653.65 1654.97 0.40 2020 8 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 8/31/2020 1143 8/31/2020 1653.65 1666.89 0.40 2020 9 BG.51-5_ST.45-0 6.2 36.8 30.6 PC 4 9/30/2020 1170 9/30/2020 1684.26 1712.80 0.37 2020 10 BG.51-5_ST.45-0 0.0 23.9 23.9 PC 4 10/31/2020 1195 10/31/2020 1708.13 1755.24 0.35 2020 11 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 11/30/2020 1194 11/30/2020 1708.13 1753.54 0.35 2021 3 BG.51-5_ST.45-0 8.7 0.1 -8.6 PC 4 3/31/2021 783 3/30/2021 1248.11 1047.25 0.81 2021 4 BG.51-5_ST.45-0 0.0 124.4 124.4 PC 4 4/30/2021 870 4/16/2021 1372.52 1198.27 0.68 2021 6 BG.51-5_ST.45-0 0.0 133.8 133.8 PC 4 6/30/2021 1168 6/16/2021 1662.57 1709.40 0.39 2021 7 BG.51-5_ST.45-0 0.0 30.9 30.9 PC 4 7/31/2021 1228 7/31/2021 1693.44 1811.16 0.36 2021 8 BG.51-5_ST.45-0 20.5 0.0 -20.5 PC 4 8/31/2021 1230 8/30/2021 1672.95 1814.55 0.38 2021 9 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 9/30/2021 1199 9/30/2021 1672.95 1762.03 0.38 2021 10 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 10/31/2021 1200 10/31/2021 1672.95 1763.72 0.38 2021 11 BG.51-5_ST.45-0 87.8 0.0 -87.8 PC 4 11/30/2021 1200 11/12/2021 1585.20 1763.72 0.47 2022 3 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 3/31/2022 739 3/31/2022 1161.59 970.56 0.89 2022 4 BG.51-5_ST.45-0 0.0 33.7 33.7 PC 4 4/30/2022 1065 4/24/2022 1195.26 1533.81 0.86 2022 5 BG.51-5_ST.45-0 0.0 0.0 0.0 PC 4 5/31/2022 815 5/31/2022 1195.26 1102.89 0.86 2022 6 BG.51-5_ST.45-0 0.0 144.2 144.2 PC 4 6/30/2022 820 6/1/2022 1339.48 1111.58 0.72 2022 10 BG.51-5_ST.45-0 0.0 114.3 114.3 PC 4 10/31/2022 1395 10/31/2022 1917.79 2092.35 0.14 2022 11 BG.51-5_ST.45-0 44.8 0.0 -44.8 PC 4 11/30/2022 1362 11/24/2022 1872.97 2037.03 0.18 2023 2 BG.51-5_ST.45-0 107.9 0.0 -107.9 PC 4 2/28/2023 983 2/28/2023 1409.13 1393.21 0.65 2023-02-28, 0.646 2022-11-24, 0.182 2022-10-31, 0.137 2022-06-01, 0.716 2022-05-31, 0.86 2022-04-24, 0.86 0 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 5,000 -1.00 -0.50 0.00 0.50 1.00 P/ z ( p s i ) Gp (BCF) BG.51-5_ST.45-0 All Data Current Data Mean
