Abstract by April Treviño
Fluvial Architecture and Reservoir Modeling along Strike Direction of the Trail Member of the Ericson Sandstone, Mesaverde Group in southwest Wyoming
The Trail Member of the Upper Cretaceous Ericson Sandstone, part of the Mesaverde Group, is exposed along hundreds of square kilometers through Wyoming along the flanks of several Laramide structural uplifts. This presents a unique opportunity to study the detailed architecture based on bed-scale heterogeneity and better assess the reservoir potential of these strata in outcrop exposure on a regional-scale, and to then relate these observations to producing fields nearby. The fluvial-dominated Trail Member formed as sediments traveled from the active Sevier thrust belt to the Cretaceous interior seaway, forming a basinward progradational clastic wedge along a relatively high gradient. The high energy, tectonically active setting has led to preservation of sand-rich, often compositionally immature fluvial strata. Though there is an abundance of sand-rich strata in the Trail Member, production from this interval has been unpredictable in current and past fields such as the Trail Unit of southwestern Wyoming.