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Alaska Oil and Gas Conservation Commission

Alaska Department of Administration, Alaska Oil and Gas Conservation Commission
Administration >  AOGCC >  Statistical Reports >  Annual Pool Statistics - 2004 >  Prudhoe Bay Unit, West Beach Oil Pool
AOGCC Pool Statistics
Prudhoe Bay Unit, West Beach Oil Pool
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Operator: BP Exploration (Alaska) Inc.

Discovery Well: ARCO Alaska, Inc.
  Prudhoe Bay Unit WBH WB-03
  Permit #176-034
  API No. 50-029-20208-00-00
  Sec. 25, T12N, R14E, UM

Depth: 11,835’ MD / 8,623' TVD

July 26, 1976
Status: Shut-in
Location: Central Arctic Slope Area Location Map DNR Unit Map
Orders: Complete List
Summary:
The West Beach Oil Pool was discovered in 1976 by ARCO’s West Beach No. 3 well, which encountered approximately 12 feet of hydrocarbon bearing sand in the Kuparuk Formation ("Kuparuk") that tested at a rate of 2.4 MMCFD of gas and 208 B/D of condensate.  West Beach No. 4, drilled approximately 1.2 miles east of West Beach No. 3 in 1991, penetrated 199' of oil column in the Kuparuk. Following fracture stimulation, the well tested 2,459 barrels of oil with a minor amount of water.  No oil-water or gas-oil contact was encountered in either well.  Three dimensional seismic data and subsurface well data support an interpretation that wells WB#3B and WB#4 penetrated a single fault block, which appears to be in partial fault contact with the Pt McIntyre oil accumulation to the north and with the Lisburne Oil Pool to the south. Reported reservoir are 12.1% to 25.8% porosity, 25 to 189 millidarcies permeability, and 35% to 41% water saturation.  Volumetric estimates range between 12 and 65 MMB oil in place and 10 to 56 BCF gas originally in place.  Regular production from the pool began from a single well in April 1993, and quickly peaked at an average daily rate of 4,033 barrels of oil per day in July 1993. By July of 1997, oil production had dropped to about 1,000 barrels per day.  Two additional wells were brought on line in the spring and summer of 1999.  Oil production climbed to 3,426 barrels per day by August 1999, but then declined rapidly to less than 1,000 barrels per day by July 2000.  The last recorded month of production was August 2004, which averaged 48 barrels of oil and 815 MCF of gas per day.

Strat Column
Orig. Oil in Place: 12 to 65 MMSTB (CO 311)
Orig. Gas in Place: 10 to 56 BCF (CO 311)
Production: Prod Chart Prod Report Prod Data

  Oil (bbls) NGL (bbls) Gas (mcf) Water (bbls)
Cumulative 3,360,694
0 20,011,808 137,174
2001 Total 110,309 0 1,453,206 8,607
2002 Total 3,600 0 47,901 13,006
2003 Total 9,769 0 201,454 55,924
2004 Total 4,653 058,898 14,487
2003 Daily Rate 153 03,148 874
2004 Daily Rate 245 0 3,100 762
Change (%) 60% 0% -2% -13%

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