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Home My WebLink About2015 Pretty CreekHileorp Alaska, LLC February 29, 2016 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 Iniection Volumes Pretty Creek Gas Storage Facility Pretty Creek Unit #4 Dear Commissioner Foerster: Attached for your review is the 2015 "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 2015 gas storage operations. The 51-5 gas storage reservoir was in active use for all of 2015 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 2015. 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, 2015 the estimated reservoir pressure in the 51-5 was approximately 1336 psig as estimated with a shut in tubing pressure taken on 12/22/2015. All production and injection cycles performed in 2015 consistently match the historical P over Z trend established by past performance of this reservoir. These data points are plotted with the historical data and they conform to the overall curve as shown in the attached figure in red squares. Sincerely, HILC RP ALASKA, LLC er y 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 Wellname Date Test Type Pressure at MTD, Asia Z Factorssure, TDaturn aPCU Cum Gas, bcf P/Z, Psia 4 51-5 01/01/15 SITP 1489 0.86661489 0.1925 1719 PCU 4 51-5 02/21/15 SITP 1451 0.8688 1451 0.2288 1670 PCU 4 51-5 03/01/15 SITP 1451 0.8688 1451 0.2288 1670 PCU 4 51-5 04/11/15 SITP 1456 0.8685 1456 0.2288 1677 PCU 4 51-5 05/11/15 SITP 1361 0.8743 1361 0.3506 1557 PCU 4 51-5 06/23/15 SITP 1437 0.8696 1437 0.2853 1653 PCU 4 51-5 07/29/15 SITP 1425 0.8703 1425 0.2950 1638 PCU 4 51-5 08/16/15 SITP 1407 0.8715 1407 0.3196 1614 PCU 4 51-5 09/01/15 SITP 1415 0.8709 1415 0.3174 1625 PCU 4 51-5 12/08/15 SITP 1300 0.8783 1300 0.4889 1480 PCU 4 51-5 12/22/15 SITP 1336 0.8759 1 1336 1 0.4601 1 1525 m O O O O O O- O O O O O O O O O O O O O O O O O O O O O O O 0 00 tC Cr N N lD 00 (dj:)SW) aleU uoil:)aful/uoil:)npoad SZOZ Ul � U N W W W d N W j p V V U U U V U U U T V U v c v c v v c v c u a v o c o c o c o c o c c o c o c > o =� o� o� o- o o o o o � l\p 00 00 Ol 01 O O ti N N N M M � C ul � ' O O O O O O O O O O O O O O O O C d N N N N N N N N N N N N N N N N + + Lo N a � o 4 0 0 Ln 14