REGIONAL CHEMOSTRATIGRAPHY AND MECHANICAL STRATIGRAPHY OF THE BARNETT SHALE, FORT WORTH BASIN, TEXAS
Here, we present several multi-well cross sections showing chemofacies variations and mechanical stratigraphy of the organic-rich Barnett Shale across the Fort Worth basin. These basin-wide correlations are primarily based on geochemical data derived from high-resolution ED-XRF analyses and mechanical data collected with a micro-rebound hammer. Correlations of chemostratigraphy and mechanical stratigraphy enhance our understanding of regional variations and trends in chemical composition and rock competence. Although quite variable, rock strength is controlled predominantly by clay content and secondarily by carbonate content in the rocks. Overall, results show basic chemostratigraphic zones that do not readily correlate to mechanical divisions, but reveal fundamental variations in the Barnett Shale across the Fort Worth Basin.