Reservoir compartments identified in the Boonsville (Bend Conglomerate Gas) field, Fort Worth Basin, TX occur as a result of subtle structural and stratigraphic controls. Structural compartmenting results from previously unrecognized low-displacement faulting associated with karst collapse in deeper carbonate rocks. Stratigraphic compartments may result from surface, facies, or diagenetic boundaries. Some sequences within the Bend Conglomerate were imaged quite well using 3-D seismic, while others proved difficult to distinguish, especially when those units were associated with subtle impedance contrast or were extremely thin. Multiple stacked completion opportunities will typically be needed for economic success in new wells as well spacing is reduced, but analysis of the 3-D data suggests that stacked trapping geometries commonly exist. In addition, the influence of the vertical karst collapse features on Bend Conglomerate stratigraphy also suggests the opportunity for finding multiple stacked, and at least partially isolated, reservoirs.

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