Techniques for Mapping Petroleum Reservoirs in the Hunton Group and the

Abstract

A technique was developed to map the subsurface position of the upper surface of the porous, dolomitic part of the Hunton Group within T. 17 and 18 N., R. 1 and 2 E. Comparisons between the map and production of oil and gas from the dolomitic part of the Hunton demonstrated that three types of traps of oil and gas occur in the Hunton. Most oil and gas production from the Hunton in the area is related to traps caused primarily by faulting. Anticlinal traps and combination structural and stratigraphic traps occur also. In addition, a method by which the top of the Second Wilcox Sand could be mapped structurally was developed. Production of oil and gas from the Second Wilcox was shown to be associated with three types of traps: those related to faulting, anticlinal traps of undetermined origin, and traps that are related to thinning of the Marshall Zone.