An effort to evaluate the Royal Center Storage Field was initiated to determine the feasibility of using horizontal well technology to improve the ratio of working gas to base gas and improve deliverability. The geophysical survey and interpretation was initiated by GRI and the geological modeling and reservoir analysis is being accomplished through a Cooperative Research and Development Agreement between Northern Indiana Power Supply Company and US DOE Federal Energy Technology Center. An integrated analysis of well logs, core data, and seismic survey data was applied to the Royal Center Storage Field in the Trenton Limestone aquifer. Core permeability data was compared to Epilog calculated porosity and gas saturations. The data show very complex relationships exist when compared in three dimensions. A correlation of seismic amplitude anomalies with the porosity and gas saturation on cross section was also used to evaluate potential well sites. A downhole seismic survey was then run to determine if the amplitude anomalies from the surface seismic survey could be detected and their orientations calculated to assist in designing the horizontal well. The integrated results from all of the studies were used to site a horizontal well in the northern portion of the field.