Patent ID: 8978758
Filing Date: 2015-03-17
Classification: E21B

Abstract:
1. A method for recovering oil from a hydrocarbon-containing subterranean reservoir, comprising the steps of: (i) drilling at least one upper horizontal injection well within an upper region of said hydrocarbon-containing reservoir; (ii) drilling, relatively low in said reservoir and beneath said at least one upper well, a plurality of parallel lower horizontal producer wells, situated low in said hydrocarbon-containing reservoir each positioned substantially parallel to each other but below and perpendicular to said at least one upper horizontal injection well such that said at least one upper injection well passes over said parallel lower horizontal producer wells; (iii) injecting a fluid into said at least one upper horizontal injection well and injecting said fluid into said reservoir via apertures in said at least one upper horizontal injection well; (iv) recovering oil which has migrated downwardly in said subterranean reservoir, via said lower horizontal wells; and (v) recovering said oil from said lower horizontal wells to surface.