Method of producing viscous oil from subterranean formations

Details Method of producing viscous oil from subterranean formations Method of producing viscous oil from subterranean formations

E - Fixed Constructions

21

B

166/39

E21B 43/24 (2006.01)

Patent

CA 1303974

ABSTRACT OF THE DISCLOSURE Viscous oil is recovered from a subterranean formation by (a) establishing flow communication between an injection well and a production well in a flow path along the lower portion of a formation pay zone containing the viscous oil, (b) heating the flow path and adjacent portions of the pay zone with hot water or low quality steam, (c) injecting alternating slugs of hot water and steam through the injection well and into the pay zone overlying the heated flow path to cause the oil to liquify and drain into the heated flow path and to be displaced toward the production well, (d) displacing substantially all of the oil in the heated path by hot water, and (e) recovering produced fluids through the production well. The flow path is conveniently created by placing a hori- zontal well from the vertical injection well into the pay zone. 89157ART0203

603313

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