Department of Administration

Alaska Oil and Gas Conservation Commission

Alaska Department of Administration, Alaska Oil and Gas Conservation Commission
Administration >  AOGCC >  Statistical Reports >  Current Oil & Gas Pools Statistics >  Kenai Field, Sterling Gas Pool 4
AOGCC Pool Statistics Kenai Field, Sterling Gas Pool 4
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  Operator: Marathon Oil Company
Index Map
Discovery Well: Union Oil Company of California
Kenai Unit No. 14-06
Permit #159-002
API No. 50-133-10088-00-00
Sec. 06, T04N, R11W, SM
Depth: 12,037 MD / 12,037' TVD
October 11, 1959

Status: Inactive
Location: Cook Inlet Basin Area Location Map Pool Location Map DNR Unit Map
References: List of Orders Summary - Annotated Reference List  
Summary:

Sterling Gas Pool 4 within the Kenai Gas Field is defined as the accumulation of gas common to and which correlates with the accumulation found in the interval 4412' to 4558' in the KU 21-06 well. This pool was discovered on October 11, 1959 by the Kenai Unit No. 14-06 well, and regular gas production began in April 1965 from the Kenai Unit 14-04 well. Production increased consistently as additional wells were brought on production between 1966 and 1985. It peaked at an average daily rate of 88,504,000 cubic feet per day in January 1982, and then declined until the last two wells, Kenai Unit 33-32 and Kenai Unit 24-05RD, were shut-in during April and May 2008.

 


Geology:

The Kenai Gas Field structure consists of an asymmetric anticline that trends north-south that lies about 5 miles south of the City of Kenai. The axis of this anticline is parallel with, and about 1 mile east of, the eastern coastline of the Cook Inlet. The eastern flank of the anticline dips toward the east with a slope of about 300 feet per mile, while the western flank dips westward at about 800 feet per mile. At the top of Sterling Gas Pool 4, the crest of the anticline lies about 3,650 below sea level. At the 4,200-foot elevation contour (below sea level), the anticline measures about 5-1/2 miles long and 3-1/4 miles wide. The Kenai Gas Field anticline lies on trend with, but is fault-separated from and is shallower than, the Cannery Loop anticline that lies 5 miles to the north.

 

In the Kenai-Cannery Loop area, the Pliocene-aged Sterling Formation comprises thick, continuous, sandstones of good reservoir quality that were deposited by large, meandering streams. These streams flowed south and southeastward from the Aleutian-Alaska Ranges, parallel to the basin axis, and produced 30- to 60-foot thick point-bar sandstones that are laterally continuous and separated by layers of flood-plain siltstone, mudstone and coal. Active volcanism, uplift, and erosion of the Aleutian and Alaska Ranges provided constituent sediments that ranged from sand (generally fine-grained, but rarely pebbly) to mud. The sand-sized sediment fraction consists mainly of quartz, plagioclase, biotite, and volcanic rock fragments. Rare pebbles consist of coarse-grained plutonic and fine-grained volcanic rocks. Sterling sandstones have good reservoir quality because of diagenetic dissolution of minerals and volcanic rock fragments producing secondary porosity and yielding effective porosities ranging up to 31 percent and permeabilities that may exceed one darcy. The Sterling Formation is characterized by a high net-to-gross sand ratio.

 

Structure Map Strat Column Representative Log
Production: Prod Chart    
  Gas (mcf) Water (bbls)
Cumulative 451,849,034 154,714
2005 Total
2,376,804 2,292
2006 Total
1,651,405 1,853
2007 Total
738,616 145
2008 Total
33,311 11
2009 Total
0 0
2010 Total
0 0
2011 Total
0 0
2007 Rate (mcf/d)
2,024 0
2008 Rate (mcf/d)
91 0
2009 Rate (mcf/d)
0 0
2010 Rate (mcf/d)
0 0
2011 Rate (mcf/d)
0 0
2008 Change (%)
-55 0
2009 Change (%)
-100 0
2010 Change (%)
0 0
2011 Change (%)
0 0
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