Department of Administration

Alaska Oil and Gas Conservation Commission

Alaska Department of Administration, Alaska Oil and Gas Conservation Commission
Administration >  AOGCC >  Statistical Reports >  Annual Pool Statistics - 2004 >  Beaver Creek, Beaver Creek Oil Pool
AOGCC Pool Statistics
Beaver Creek, Beaver Creek Oil Pool
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Operator: Marathon Oil Company

Discovery Well: Marathon Oil Company
  Beaver Creek Unit No. 4
  Permit #172-013
  API No. 50-133-20239-00-00
  Sec. 33, T07N, R10W, SM

Depth: 15,940 MD / 15,715' TVD

December 17, 1972

Status: Producing
Location: Central Arctic Slope Area Location Map
DNR Unit Map
Orders: Complete List
Summary:

The Beaver Creek Oil Pool was discovered in 1972 by the Beaver Creek Unit No. 4 well and developed with four wells drilled between 1972 to 1981. Regular production began in January 1973, and peaked at 2,188 barrels of oil per day during July 1973. At the end of 2004, the production from the pool averaged 186 barrels of oil and 23 barrels of water per day. Production from the pool has been dominated by Beaver Creek Unit No. 4, which has produced a total of 4,455,577 barrels of oil. The other major producer is Beaver Creek Unit No. 5RD, which has produced 1,206,737 barrels of oil. Beaver Creek Unit No. 5 and No. 6 have been minor producers.

Geology:
The Beaver Creek oil pool is the accumulation of oil that is common to, and correlates with, the accumulation present in the Beaver Creek Unit No. 4 well between the measured depths of 14,518 feet and 15,874 feet. This oil pool comprises reservoir sandstone and conglomeratic sandstone assigned to the Tyonek G-Zone and the Hemlock Formation. These sediments are fluvial in origin, and were deposited as valley-fill and or within floodplains. The Beaver Creek Oil Pool accumulation lies at the crest of a nearly circular anticline, which is slightly elongate in a north-south direction. The accumulation is bound by to the east by a north-south trending fault, and by dip closure to the north, west, and south. The crest of the anticline lies approximately 14,500 feet below sea level. Pressure transient analysis of DST data indicates the Hemlock has an effective permeability of 0.5 md, and the G-Zone has an effective permeability of about 75 md. Oil gravity in the G-Zone is approximately 34 to 35 degrees API, and viscosity is approximately 0.7 centipoise.

Strat Column Type Log
Production: Prod Chart Prod Report Prod Data

  Oil (bbls) NGL (bbls) Gas (mcf) Water (bbls)
Cumulative 5,725,937
0 2,041,869 65,202
2001 Total 84,562 0 21,450 2,681
2002 Total 79,481 0 23,082 5,720
2003 Total 76,134 0 23,040 4,809
2004 Total 68,062 0 22,067 8,430
2003 Daily Rate 209 0 63 13
2004 Daily Rate 186 0 60 23
Change (%) -11% 0 -5% 77%

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