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Home My WebLink About2012 Pretty CreekHilcorp Alaska, LLC March 12, 2013 Mrs. Cathy Foerster, Chair Alaska Oil and Gas Conservation Commission 333 W. 7th Avenue, Suite 100 Anchorage, AK 99501 R EYED MAR 14 2013 AOGCC 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: 2012 Annual Material Balance Calculations of Production and Infection Volumes Pretty Creek Gas Storage Facility Pretty Creek Unit #4 Dear Commissioner Foerster: Attached for your review is the 2012 "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 2012 gas storage operations. The 51-5 gas storage reservoir was in active use for all of 2012 and was an important component of total gas deliverability for the Cook Inlet. There are one active wells that is used for injection and production — Pretty Creek Unit #4 (aka PCU #4). Attached find monthly injection and production data for 2012. 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. As of December 31, 2012 the estimated reservoir pressure in the 51-5 was approximately 1350 psig as estimated from the attached chart. Notice that one downhole pressure survey was performed in May and eight BHP calculations were made for the 2012 storage cycle between February and December. 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 ALASKA, LLC J lien Reservoir Engineer Attachments: 1) Production and Injection Table — Pretty Creek Unit #4 2) 51-5 P/Z Data 3) 51-5 P/Z vs Cumulative Production Plot API WellNo ReportDate ProdGas ProdDays Inj_Gas Inj_Days 50283201000000 01 -Jan -12 277797 29 3669 3 50283201000000 01 -Feb -12 23401 11 42554 29 50283201000000 01 -Mar -12 156498 10 1 1 50283201000000 01 -Apr -12 906 7 23316 2 50283201000000 01 -May -12 146731 19 1 1 50283201000000 01 -Jun -12 10892 17 1 1 50283201000000 01 -Jul -12 1068 11 52945 14 50283201000000 01 -Aug -12 0 0 46290 12 50283201000000 01 -Sep -12 103904 18 16477 3 50283201000000 01 -Oct -12 82255 13 79277 15 50283201000000 01 -Nov -12 112312 211 21082 8 50283201000000 01 -Dec -12 1924531 291 0 0 PCU #4 Pretty Creek Unit Gas Storage Reservoir 51-5 - P/Z Data Well Name Date Z Factor BHP, PSI Cum Gas, BCF P/Z, PSI Primary Production PCU 4 45-0 51-5, 55-6 02/03/02 0.8533 1457 0.2500 1707 PCU 4 45-0 & 51-5 05/11/02 0.8661 1270 0.8600 1466 PCU 4 45-0 & 51-5 04/10/03 0.8862 1026 1.7200 1158 PCU 4 45-0 5/7/2003 0.8801 1095 1.7300 1244 PCU 4 45-0 04/20/04 0.9196 687 2.0300 747 PCU 4 51-5 07/06/04 0.8866 1021 0.8700 1152 PCU 4 51-5 09/20/04 0.8970 910 1.0000 1015 PCU 4 51-5 02/07/05 0.9200 683 1.2900 742 PCU 4 51-5 02/13/05 0.9215 669 1.3000 726 PCU 4 51-5 09/30/05 0.9429 475 1.6500 504 2006/2007 Injection Cycle PCU 4 51-5 02/09/06 0.9154 726 1.3000 793 PCU 4 51-5 05/03/06 0.8831 1061 1.0260 1201 PCU 4 51-5 09/27/06 0.8697 1222 0.8842 1405 PCU 4 51-5 10/11/06 0.8679 1246 0.7985 1436 PCU 4 51-5 10/24/06 0.8671 1257 0.7826 1450 PCU 4 51-5 11/07/06 0.8596 1360 0.6621 1582 PCU 4 51-5 11/10/06 0.8603 1350 0.6598 1569 PCU 4 51-5 11/20/06 0.8601 1354 0.6355 1574 PCU 4 51-5 12/03/06 0.8594 1363 0.6174 1586 PCU 4 51-5 12/20/06 0.8566 1406 0.5440 1641 PCU 4 51-5 12/24/06 0.8557 1419 0.5310 1658 PCU 4 51-5 12/28/06 0.8560 1414 0.5269 1652 PCU 4 51-5 01/08/07 0.8546 1436 0.5091 1680 PCU 4 51-5 02/05/07 0.8518 1482 0.4351 1740 PCU 4 51-5 05/07/07 0.8459 1589 0.1765 1879 PCU 4 51-5 06/05/07 1 0.8438 1 1629 0.0708 1930 PCU 4 51-5 12/12/07 1 0.8455 1595 1 0.0077 1886 2008 Production Cycle PCU 4 51-5 01/01/08 0.8470 1567 0.0440 1850 PCU 4 51-5 01/22/08 0.8483 1544 0.0783 1820 PCU 4 51-5 02/25/08 0.8543 1442 0.2623 1688 PCU 4 51-5 04/28/08 0.8533 1458 0.2686 1709 2008 Injection Cycle PCU 4 51-5 05/17/08 0.8507 1501 0.2120 1764 PCU 4 51-5 06/23/08 0.8453 1600 0.0484 1893 PCU 4 51-5 06/26/08 0.8453 1599 0.0442 1892 PCU 4 51-5 07/31/08 0.8425 1658 -0.0775 1968 PCU 4 51-5 08/07/08 0.8526 1655 -0.0770 1941 PCU 4 51-5 09/22/08 1 0.8445 1 1616 -0.0765 1914 2009 Production Cycle PCU 4 51-5 02/19/09 1 0.8665 1265 0.4747 1460 2009 Injection Cycle PCU 4 51-5 04/08/09 1 0.8643 1 1294 1 0.4747 1497 PCU 4 51-5 111/30/09 1 0.8428 1 1652 1 -0.1267 1960 2010 Production Cycle PCU 4 51-5 102/21/10 1 0.8441 1 1624 1 -0.1256 1924 PCU 4 51-5 06/24/10 1 0.8442 1 1622 1 -0.1060 1921 2010 Injection Cycle PCU 4 51-5 09/01/10 0.8365 1805 -0.4467 2158 PCU 4 51-5 10/15/10 0.8424 1861 -0.6671 2209 PCU 4 51-5 11/01/10 0.8347 1858 -0.6671 2226 2011 Production Cycle PCU 4 51-5 07/05/11 1 0.8434 1 1638 1 -0.1256 1 1942 2011 Injection Cycle PCU 4 51-5 111/01/11 1 0.8337 F 1893 -0.7611 2271 2012 Storage PCU 4 51-5 02/22/12 0.8676 1660 -0.4324 1913 PCU 4 51-5 04/16/12 0.8707 1585 -0.2582 1820 PCU 4 51-5 05/18/12 0.8487 1536 -0.2007 1810 PCU 4 51-5 06/12/12 0.8735 1522 -0.1257 1742 PCU 4 51-5 07/15/12 0.8730 1534 -0.1243 1757 PCU 4 51-5 08/07/12 0.8710 1578 -0.1759 1812 PCU 4 51-5 09/05/12 0.8698 1606 -0.2214 1846 PCU 4 51-5 110/21/12 0.8456 1594 -0.2037 1885 PCU 4 51-5 112/31/12 1 0.88208 1356 0.1452 1537 N O C O �j W Ol Ol d d O O U > U T U T U T U T d j N O C O C O C O C O C T O zO i+ O i+ O a+ O m o > E O` N O` O O E O 'i N - O 0 O 0 O O 0 O 0 O O � d N N N N N N N N N N N O N O a c 0 U+ o 3 O + U a m ++ m U ci -o + O U + N • o ca I I > 3 N d U � LM ri + Ln • 0 —U o o- ++ .,1 + 0 0 U1 N O N