Descriptions of Oil Fields and Salt Domes
The Driscoll pool is in central Duval County in southwest Texas. The surface is mantled by caliche and gravels of Recent age which makes surface geology unreliable. Sands and clays of the Reynosa or Lower Lissie formation of Pliocene age make up the surface exposures. Tests drilled in the area have penetrated Miocene, Oligocene, and as deep into the Eocene as the Cook Mountain formation. Production in the Driscoll pool is coming from the Oakville, Frio, and Fayette sands. Oil from the Fayette is 23°Bé. gravity of Mirando quality. The present three wells will produce approximately 500,000 barrels of oil, or a per-acre yield of 16,500 barrels. The pool should ultimately cover 640 acres. The structure is a sand lens controlled by folding. The Government Wells, Mirando, Pettus, and Yegua sands have not been tested but should be found in the area above 4,500 feet.