Simulation of horizontal wells to mitigate miscible solvent gravity override in the Virginia Hills margin

Significant incremental recovery can be obtained when vertical sweep is imp roved in the mature Phase I Miscible Flood area of the Virginia Hills Field . This study advances our knowledge of the gravity override processes opera ting in this complex carbonate reservoir. Furthermore it shows that horizon tal injection improve sweep efficiency thereby alleviating the impact of so lvent gravity override. As a result of this simulation, a successful horizo ntal injection well was drilled, with an actual 18 E(3)m(3) incremental oil recovery to date and a predicted 65 E(3)m(3) total incremental oil. The re sults of this study suggest redevelopment in mature EOR areas is expected t o extend the life of the miscible flood and increase overall recovery.