GeoDigital Information's Minnelusa Formation study is designed to enhance both exploration and development efforts that are directed at Minnelusa reservoirs. These reservoirs occur within eolian sequences at multiple stratigraphic horizons. GDI has created an extensive stratigraphic framework that documents the extent of these reservoir-potential intervals. The mapping of these intervals is essential in the exploration for Minnelusa reservoirs.

     The Minnelusa Formation study represents twelve man-years of geologic research which affords explorationists significant time savings in assimilating data and developing exploration strategies. The study area covers over 5,100 square miles in northeastern Wyoming and southeastern Montana. It spans Crook Campbell and Weston counties in Wyoming and portions of Powder River and Carter counties in southeastern Montana.

     Correlations of 4,332 wells were made by defining 29 geologic markers throughout the study area. In addition, porosity limits were defined for all wells with suitable log suites.

     Minnelusa depositional models and lithofacies reservoir potential are determined through the integration of core, thinsection, and log analyses. Nine representative field studies are incorporated with a focus on Minnelusa reservoir characteristics, trap types, and deliverability.

     The Minnelusa study contains descriptions of 222 cores. Additionally, more than 400 thinsections were examined to define the diagenetic sequence of events that affect reservoir quality. These core and thinsection descriptions are essential for understanding the geologic history of the Minnelusa in the Powder River Basin.

     The study components include an extensive summary text and figures, maps and cross sections, core and thinsection descriptions, and stratigraphic data appendices. These components provide the client with a presentation format that is concise and readily useable.