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, Tyonek Gas Pool 1
AOGCC Pool Statistics Kenai Field, Tyonek Gas Pool 1
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  Operator: Marathon Oil Company Index Map
Discovery Well: Union Oil Company of Calfornia
Kenai Unit No. 14-06
Permit nO. 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: Producing
Location: Cook Inlet Basin Area Location Map Pool Location Map DNR Unit Map
References: List of Orders Summary - Annotated Reference List  
Summary:

Within the Kenai Gas Field, Tyonek Gas Pool 1 is defined as the accumulation of gas common to and which correlates with the accumulation found in the interval 9155' to 9890' in the Kenai Deep Unit No. 1 well. This pool was discovered on October 11, 1959 by the Kenai Deep Unit No. 1 well, and regular gas production began in March 1968 from Kenai Deep Unit No. 1. Production peaked at an average daily rate of 52,381,000 cubic feet per day in February 1979 from 3 production wells and then began to decline. During 2009, one additional new well, Kenai Deep Unit No. 9, was drilled, briefly increasing production. During April and May of 2011, only the Kenai Deep Unit No. 1 well produced gas from this pool, averaging 1,985,000 cubic feet per day. Prior to 1980, 8994 barrels of oil were reportedly produced from this pool by the Kenai Deep Unit No. 1 and No. 4 wells.


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 shallowest perforated interval in the Tyonek Gas Pool lies 8760 feet below sea level in the Kenai Deep Unit No. 1 well.

 

In the Kenai-Cannery Loop area, the Miocene-aged Tyonek Formation comprises thick (up to 40 feet or more) sandstones and conglomeratic sandstones of good reservoir quality that were deposited by larger, meandering streams within a poorly drained alluvial plain. These sandstones are well consolidated, quartz-rich, feldspathic litharenites and sub-litharenites. Although these sandstones contain clay and calcite cement, their effective porosities range up to 12 percent and permeabilities may exceed 50 millidarcies. Coal beds are also present, especially in the deeper portions of the pool, where they may reach more than 20 feet in thickness.

 

  Strat Column Representative Log
Production: Prod Chart    
  Gas (mcf) Water (bbls)
Cumulative 192,131,867 93,353
2005 Total
817,421 1,817
2006 Total
1,051,097 9,280
2007 Total
989,168 2,748
2008 Total
1,349,871 2,854
2009 Total
1,875,897 2,602
2010 Total
693,171 846
2011 Total
840,397 664
2007 Rate (mcf/d)
2,710 8
2008 Rate (mcf/d)
3,698 8
2009 Rate (mcf/d)
5,139 7
2010 Rate (mcf/d)
5,139 2
2011 Rate (mcf/d)
2,302 2
2008 Change (%)
36 0
2009 Change (%)
39 -13
2010 Change (%)
-63 -67
2011 Change (%)
-15 0
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