In this paper, I will determine the subsurface structure of the Spencer Consolidated Oil Field occupying Sections 1, 2, 11-15, 22, 26, and 27 of Township 8 South, Range 14 West, Posey County, Indiana (Uniontown 7 1/2" Quadrangle).Oil production in the Spencer Consolidated is from three principal formations. These are, in descending stratigraphic order, the Renault Formation, Aux Vases Sandstone, and Ste. Genevieve Limestone, in which the producing zones are referred to as either McClosky sands or oolitic bodies. Mapping the configuration of the oilbearing rocks and defining the distribution of these rocks will be my main concern.Structure contour maps of these three formations were prepared, as were isopach maps of the base of the lower Renault limestone and the Aux Vases Sandstone. There are insufficient data points defining the Ste. Genevieve.For the possible recovery of new hydrocarbons within the Spencer Consolidated and the exploration of existing traps, electric log correlation sections, both transverse and parallel to the surrounding faults, were made. For reliability and consistency, only those wells with electric logs were used.