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Home My WebLink About2014 Pretty CreekHilcorp Alaska, LLC March 4, 2015 RECEIVED Mrs. Cathy Foerster, Chair Alaska Oil and Gas Conservation Commission 333 W. 7h Avenue, Suite 100 Anchorage, AK 99501 MAR 0 5 2015 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: 2014 Annual Material Balance Calculations of Production and Iniection Volumes Pretty Creek Gas Storage Facility Pretty Creek Unit #4 Dear Commissioner Foerster: Attached for your review is the 2014 "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 2014 gas storage operations. The 51-5 gas storage reservoir was in active use for all of 2014 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 monthly injection and production data for 2014. 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, 2014 the estimated reservoir pressure in the 51-5 was approximately 1490 psig as estimated a shut in tubing pressure taken that day. One injection and one production cycle were chosen to ensure the P over Z trend established by past production remains continuous. These data points are plotted with the historical data and they conform to the overall curve. Also note that the reservoir pressure remained constant between May and August when the gas storage was not in use, proving that the gas remains contained within the storage reservoir. Sincerely, HILCORP ALASKA, LLC Jeremy Mardambek Reservoir Engineer Attachments: 1) Production and Injection Chart — Pretty Creek Unit #4 2) 51-5 P/Z Data 3) 51-5 P/Z vs Cumulative Production Plot a 0 0 v O CL (D v 00 3 Q C O a=+ U a� C I i � .1 3 c O U 3 -p � C 3 o` I � �o i CL ri L c� L rl 1 Q% LL ei Co w d N O O �6 N tG 00 a}ed uolj3afuj/uoij:)npoad 2014 Storaqe PCU 451-5 01/01/14 SITP 1390 Gauge 1390 0.1266 1593 PCU 4 51-5 02/01/14 Wellname Date Test Type Te t Duration MeasurDtum ed Pressure at Z Factor Paessure, Cum Gas, bcf P/Z, Psia 0.8734 1376 0.0812 (hrs) Test Depth MTD, psia SITP Psia 0.8696 1437 0.1419 1652 PCU 451-5 05/01/14 (MTD),ft 1431 0.8700 1431 0.1419 1645 2014 Storaqe PCU 451-5 01/01/14 SITP 1390 0.8725 1390 0.1266 1593 PCU 4 51-5 02/01/14 SITP 1405 0.8715 1405 0.1266 1612 PCU 4 51-5 03/01/14 SITP 1376 0.8734 1376 0.0812 1576 PCU 4 51-5 04/05/14 SITP 1437 0.8696 1437 0.1419 1652 PCU 451-5 05/01/14 SITP 1431 0.8700 1431 0.1419 1645 PCU 4 51-5 06/01/14 SITP 1431 0.8700 1431 0.1419 1645 PCU 4 51-5 07/01/14 SITP 1431 0.8700 1431 0.1419 1645 PCU 4 51-5 08/01/14 SITP 1434 0.8698 1434 0.1419 1649 PCU 451-5 09/01/14 SITP 1437 0.8696 1437 0.1419 1652 PCU 4 51-5 10/15/14 SITP 1379 0.8732 1379 0.0656 1579 PCU 4 51-5 11/01/14 SITP 1354 0.8748 1354 0.0377 1548 PCU 4 51-5 12/31/14 ISITP I 1 1490 1 0.8665 1490 1 0.1925 1 1719 N N O U d d d d d d W — — u j. U O` p O 0 —> U —T U> UT _ UT T J 6 « C C V V U U VO OU O OC OC r . P C+ CC O OC .OC. ` > «> O O O >EN O_20-.,2,25-05E d O p d p d p d p d p m d O v p 2' N = E. N O O .i .-I N a a o o .N Nm o o o 00 � dE N + . + . . + oNNNNN0a00NN N N O + 0- 0 0 4.0 + u 0 + U ++ a E o u +' 0 N to co > N d U 111 � Ln + � o i �Q 10 0 0� N