Reservoir characterization, three-dimensional geological modeling, and reservoir simulation of North Blowhorn Creek Oil Field, Lamar County, Alabama

North Blowhorn Creek Oil Field is located in northeastern Lamar County, Alabama. The field was unitized and a water flood project started in 1983. In 1992, a microbial permeability profile modification project began as a result of continued declining production. The original oil in place was estimated to be 16 million barrels. The Carter sandstone lies within the Carter interval which is underlain by the Bangor Limestone and is overlain by the Millerella limestone. The depositional model proposed interprets the Carter sandstone, at North Blowhorn Creek Field, as a delta-destructive barrier island spit complex characterized by spit accretion and later drowned and covered by open shelf deposits. Eight facies were identified within the Carter interval from describing 20 well cores.; The Carter is an elongate sand body that trends northwest to southeast. The primary reservoir facies is the foreshore/upper shoreface facies. The trapping mechanism is stratigraphic. Reservoir characterization and modeling of the Carter sandstone has the potential to improve field-scale reservoir management. Resistivity logs were used to identify reservoir rocks in wells without core. 3-D modeling shows the heterogeneous nature of the reservoir facies. Heterogeneities within the reservoir reduce waterflood sweep efficiency across the main axis of the reservoir in the field. Flow is also restricted along the axis of the sand body due in part to spit accretion.; The purpose of this study was to integrate 3-D geologic modeling, decline curve and type curve analysis and reservoir simulation to characterize the geology, geometry and flow characteristics of North Blowhorn Creek Oil Field in an effort to provide a reservoir management strategy to increase the ultimate recovery from the field. Decline curve analysis was performed for all production wells to calculate an estimated ultimate recovery (EUR) and amount of remaining reserves for each well. Type curve analysis was performed in an effort to characterize the effectiveness of the water flood and MPPM projects. A reservoir simulation was performed based on the 3-D geologic model that was constructed in a previous study. The simulation work was an effort to find areas of remaining reserves and validate the geologic model.