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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, Beluga Undefined Gas Pool
AOGCC Pool Statistics Kenai Field, Beluga Undefined Gas Pool
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  Operator: Marathon Oil Company
Index Map
Discovery Well: Union Oil Company of California
Kenai Deep Unit No. 6
Permit No. 178-056
API No. 50-133-20320-00-00
Sec. 31, T05N, R11W, SM
Depth: 11,095 MD / 9,808' TVD
February 24, 1979

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

The only production assigned to the Beluga Undefined Gas Pool of the Kenai Gas Field is 120,000 cubic feet of gas recovered from the Kenai Deep Unit No. 6 development well, which lies about five miles south of the City of Kenai. This limited gas production apparently occurred during Drill Stem Test No. 6, conducted February 24, 1979 over the interval from 5,488 to 5,498 feet measured depth for 7-1/2 hours. The Testing Summary for Drill Stem Test No. 6 also reports associated water production at an average rate of about 70 barrels per day. Other attempts to test this pool from 5,793 to 5,808 feet and 5,853 to 5,857 feet measured depth were unsuccessful.



At Beluga Formation level, 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 350 feet per mile, while the western flank dips westward at about 750 feet per mile. At the top of the Beluga Formation, the crest of the anticline lies about 4,500 below sea level. At the 5,000-foot contour (below sea level), the anticline measures about 5-1/2 miles long and 2-1/2 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 Miocene-aged Beluga Formation is composed of interbedded, nonmarine mudstone, siltstone, and sandstone with minor amounts of lignitic to sub-bituminous coal that occurs in thin (less than 5 feet thick), regionally discontinuous beds. The Beluga formation is characterized by a low net-to-gross sand ratio. Beluga sediments were sourced by the erosion of metasedimentary rocks of the Kenai-Chugach Mountains to the east, and deposited by westward-flowing, high-gradient, shallow, braided streams that, over time, built alluvial fans toward the center of the Cook Inlet Basin. Because this fan sequence prograded toward the west, the Beluga depositional sequence grades upward from thin, outwash-plain sandstone deposits in the lower part of the formation to thicker, higher-quality, anastomosing-stream sandstone deposits in the upper formation. Mudstone and coal beds are common to abundant in the Beluga Formation, which is unusual for alluvial fan deposits. The nearby Kenai-Chugach Mountains are composed mainly of metamorphosed fine-grained, deep-sea sediments (metasiltstone, metasandstone, argillite, slate, and phyllite). Erosion of these fine-grained rocks apparently supplied large quantities of silt and mud that was spread over the alluvial fan surfaces by sheet-floods and then stabilized by abundant vegetation. As a result, Beluga sandstone reservoirs are commonly laterally discontinuous and isolated from one another by mudstone and siltstone.


Structure Map Strat Column Representative Log
Production: Prod Chart    
  Gas (mcf) Water (bbls)
Cumulative 120 0
2005 Total
0 0
2006 Total
0 0
2007 Total
0 0
2008 Total
0 0
2009 Total
0 0
2010 Total
0 0
2011 Total
0 0
2007 Rate (mcf/d)
0 0
2008 Rate (mcf/d)
0 0
2009 Rate (mcf/d)
0 0
2010 Rate (mcf/d)
0 0
2011 Rate (mcf/d)
0 0
2008 Change (%)
0 0
2009 Change (%)
0 0
2010 Change (%)
0 0
2011 Change (%)
0 0
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