Sonic logs, which are key logs in defining Minnelusa sands, in the C-H field were used to construct synthetic seismograms. These synthetics were then organized in cross-section form to define whether a change in Minnelusa sands would yield an identifiable change on the synthetics. The "idealized" seismic response did show an obvious lateral change from upper sand to no upper sand conditions, and a pilot seismic line was shot using a Vibroseis source. This line, which was shot through the C-H Field, successfully showed the updip limits of the upper Minnelusa sands. A subsequent seismic program was acquired and other leads and prospects were identified, including prospects that were drilled and successfully completed in the Rozet area. High resolution processing and seismic attribute processing was done on some of the seismic data yielding differing degrees of success.--Modified journal abstract.