Energy's Central Oklahoma Project Area is situated on a large broad northwest plunging
anticlinorium in the Pauls Valley Uplift geological province. The Pauls
Valley Uplift is associated with the southwestern portion of the Hunton
Arch. The uplift is separated from the Arbuckle Uplift to the south by
the Mill Creek syncline and slopes westward into the Anadarko basin.
Individual structures on the Pauls Valley Uplift consist of anticlines,
synclines, monoclines, and faulting of all styles. Many small to medium
size anticlinal and fault bound traps in this province have been
developed to produce prolific amounts of Simpson oil. It is common for
these Simpson sands to contain from 450 to 1,000 barrels of oil per acre
foot and because of the active water drive, it is common to recover in
excess of 80% of the original oil in place from these structural traps.
These conditions also provide fertile hunting grounds for updip/attic
oil reserves in the mature oilfields. Because of the water drive
depletion, undrilled updip locations can be oil-filled and due to the
large reservoir volume, very small areas can yield extremely prolific
production. Several such structural situations have been identified in
this Central Oklahoma Project area.
In addition to the remaining reserves
identified at updip locations in the mature Simpson oilfields,
the improved structural picture of the Viola limestone has revealed
several areas for development of the Pennsylvanian sands draped over
underlying structures or pinching out as they onlap. The potential for
further development of both oil and gas in various reservoirs within the
area is very strong.
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