On August 14, 1975, Chevron Oil Co. spudded the No. 1 Alma Plantation in Sec. 87, T6S, R11E, Pointe Coupee Parish, Louisiana. The objective was in Cretaceous rocks at a projected total depth of 22,500 ft (6,858 m). This became the discovery well for False River field. To this date, nine wells have been completed in the field from the Tuscaloosa Formation of early Late Cretaceous age at a depth of 19,800 ft (6,035 m). In addition, seven wells are being drilled or tested, and two have been completed as dry holes. The No. 1 Alma Plantation flowed at the rate of 20 MMcf of gas per day with a flowing tubing pressure of 11,600 psig (79,878 kPa). The initial shut-in reservoir pressure was 16,806 psig (115,776 kPa). From subsurface and seismic data, a structure appears to be buri d below the base of the Austin Chalk. This structure is 20-mi (32 km) long and 10-mi (16 km) wide at a depth of approximately 19,000 ft (5,791 m), and is situated adjacent to the south side of a Cretaceous hinge line. This hinge line extends from Lake Bornge northwesterly across south-central Louisiana into southern Vernon Parish. From subsurface and seismic data it appears that the structure is depositional in origin.

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