Reservoir Heterogeneity as a Function of Accumulation and Preservation Dynamics, Tensleep Sandstone, Bighorn and Wind River Basins, Wyoming

摘要: Abstract The processes controlling accumulation and preservation of the Tensleep Sandstone eolian units in Bighorn Basin are distinct, have different effects on reservoir heterogeneity. Accumulation is net deposition sediments within an system, whereas marks entrance into stratigraphic record. Upper occurred a dry that is, one which occurs as result aerodynamic controls unaffected by local water table. Conversely, was caused relative rise sea level placed area below regional base-level erosion. orientation character bounding surfaces internal laminations facies indicate ergs were dominated large compound bedforms affected annual fluctuations airflow. Reservoir heterogeneity can be considered scales Sandstone. Small-scale heterogeneities, such stratification type, surfaces, lateral variations microscopic pore structure, during accumulation. These fabric, along with drive type fluid mobility ratio, govern sweep efficiency ultimate recovery. Large-scale represented areally extensive marine dolomites Tensleep, controlled longer-term space influenced sea-level fluctuations. features overall continuity and, tectonic size. Delineation these sedimentary resulting rock fabrics will enhance future incremental production from Sandstone, Wyoming.