Delineation of unrecovered mobil oil in a mature dolomite reservoir
Since discovery in 1927, the East Penwell San Andres Unit has produced 43 million barrels of primary and waterflood oil of an estimated 164 million barrels of original oil in place. Approximately 30 million barrels of mobile oil remains in the primary reservoir of this unit. The objective of this investigation was to locate this remaining mobile oil using geologic and engineering techniques. Results are included in this book which indicates that the San Andres Formation in the north part of the unit contains a thick section of reservoir-quality pellet grainstone/packstone, which was affected by a postburial leaching event that increased permeability. The overlying nonreservoir peritidal rock is thin. In the south part of the unit this peritidal rock is thicker, and this part of the unit has relatively low production and low volumes of remaining mobile oil. East-west-trending tidal channels in the north part of the unit are potential targets for infill development drilling.
- OSTI ID:
- 5118080
- Country of Publication:
- United States
- Language:
- English
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