A total of 692 wells comprised the drilling operations in South Arkansas and North Louisiana for the year 1945, as compared with 547 in the preceding year and 602 in 1943. Of this total for 1945, 115 dry wildcats were drilled, of which 34 were drilled in South Arkansas and 81 in North Louisiana, as compared with 64 wildcats in South Arkansas and 79 in North Louisiana for 1944.

South Arkansas claimed 3 new oil fields and 3 new producing zones in old fields, while North Louisiana was credited with 7 new oil fields, 4 new gas fields, 1 new distillate field, 4 new oil-producing zones in old fields, 3 new gas-producing zones in old fields, and 1 new distillate-producing zone in old fields. Future drilling might prove several oil pools, which have been given new oil-pool rank, to be extensions of old pools.

The gross oil production of South Arkansas during 1945 amounted to 28,547,400 barrels as compared with 29,312,020 barrels in the preceding year. North Louisiana produced 25,722,270 barrels of oil in 1945 and 26,569,565 barrels in 1944. The area as a whole showed a decline in production of oil of approximately 2.9 per cent.

Subsurface data led to the discovery of more new oil and gas pools than any other method employed, with seismograph a close second.