The development in South Texas during 1948 showed a 23 per cent increase over the previous year. In all 2,987 tests, 2,158 wells in proved areas and 829 wildcat wells, were drilled and resulted in 1,915 successful completions. The exploratory development resulted in the discovery of 81 producing reservoirs in 79 new areas, 3 of the discovery wells being dual completions. The most important of the new discoveries are the Doering Ranch field in Frio County, the Holly field in DeWitt County, the South Long Horn field in Duval County, the San Pablo field in Jim Hogg County, the Quien Sabe field in Webb County, the East Long Mott field in Calhoun County, and the Sarita field in Kenedy County. Wells drilled in productive areas uncovered 155 new producing beds in 84 fields, the rio-Vicksburg trend accounting for 108 of the total. At the close of 1948 oil wells totaling 16,738 had produced 169,739,954 barrels of oil, 10 per cent more than had been produced from the area during the previous year. Thirty-six per cent of the oil wells in the South Texas district are now being serviced for casinghead gas.