Exploration of the Pliocene-Pleistocene in the Gulf of Mexico since 1970 has resulted in the discovery of significant hydrocarbon reserves. One of the better gas fields has been the Block 270 East Cameron field. Utilization of a coordinated exploration plan with Schlumberger has allowed Pennzoil as operator to develop and put on production the Block 270 field in minimum time.

Block 270 field is a north-south trending faulted nose at 6,000 ft. At "G" sand depth (8,700 ft) the structure has closed, forming an elongated north-south structure with dip in all directions from the Block 270 area. Closure is the result of contemporaneous growth of the east-bounding regional fault.

Structural and stratigraphic interpretations from dipmeters were used to help determine the most favorable offset locations. The producing zones were found to consist of various combinations of barlike, channellike, and distributary-front sands. The sediment source for most of the producing zones was southwest of the area. However, two zones are exceptions and derived sediments from the north through a system of channels parallel with the east-bounding fault.

Computed logs were used to convert conventional logging measurements into a more readily usable form for evaluation. The computed results were used for reserve calculations, reservoir quality determinations, and confirmation of depositional environments as determined from other sources.

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