Department of Commerce, Community, and Economic Development
Alaska Oil and Gas Conservation Commission
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HomeMy WebLinkAbout2017 Kenai Gas FieldHilcorp Alaska, LLC
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March 13, 2018
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Mr. Hollis French, Chair
Alaska Oil and Gas Conservation Commission
333 W. 7t' Avenue, Suite 100
Anchorage, AK 99501
4L C
Re: Kenai Gas Field
SIO #7
2017 Sterling Pool 6 Annual Performance Evaluation
Dear Commissioner French:
Post Office Box 244027
Anchorage, AK 99524-4027
3800 Centerpoint Drive
Suite 100
Anchorage, AK 99503
vhughes@hilcorp.com
Phone: 907/777-8445
Fax: 907/777-8310
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Attached for your review is the 2017 Annual Performance Evaluation for the Sterling Pool 6
Gas Storage Reservoir according to SIO #7. This report covers the primary production and
injection period through the 2017 gas storage operations.
Sterling Pool 6 continues to exhibit tank like behavior with neither influx of other fluids nor
loss of storage gas based on the evidence shown in the exhibits below. Injection wells
continue to act as expected based on an injectivity index. Real time downhole pressure
monitoring is possible with shut in tubing pressures of KU 34-31 corrected to reservoir
pressure.
For the annual period ending 12/31/2017 the total volume injected into Sterling Pool 6 was
9,214 MMSCF and total production was 4,913 MMSCF. The total native gas withdrawn
from Pool 6 was 1,296 MMSCF with a native gas balance of 0 MMSCF. The native gas was
determined to be fully depleted as of November 2017. All Pool 6 gas production after this
date is considered 100% storage gas.
The maximum reservoir pressure recorded in Pool 6 based on the KU 34-31 monitoring well
SITP (shut in tubing pressure) was 260 psi or a reservoir pressure of 287 psi. This pressure
is expected to be distributed consistently throughout the productive area of Pool 6 and is
below the maximum reservoir pressure of 300 psi as established by rule #4 of SIO 7.
Regar ,
ony McConkey
Reservoir Engineer
Exhibit #1 — List of wells and service
Exhibit #2 — KU 34-31 Monitoring Well SITP during 2017
Exhibit #3 — Monthly Production and Injection Volumes for 2017
Exhibit #4 — P/z plot for Injection Period 2017
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