The area covered in this paper extends from a line drawn north and south through San Angelo, westward to include Eddy County, New Mexico, and south from the Cochran-Hockley County north line to the Southern Pacific Railroad through Brewster and Terrell counties.

Drilling operations in the area in 1937 were 62 per cent more than those in 1936 but discoveries were few and additions to reserves were limited. New Mexico had 43 wildcats against 13 in 1936 but only 3 small discoveries were made. West Texas had 166 wildcats in 1937 against 277 in 1936 with a result of 2 major and 10 minor discoveries. Several of the fields in both New Mexico and West Texas were extended. Field development accounted for 94 per cent of the drilling operations.

Considerable Ordovician testing was done, but no outstanding results were obtained.

The east and west boundaries of the Central Basin platform were more closely defined and the boundary zone between the platform and the Delaware basin was more definitely outlined.