Method for producing heavy crude

Details Method for producing heavy crude Method for producing heavy crude

1979-10-29

1981-07-28

Novosad, Stephen J.

Wells

Processes

Heating, cooling or insulating

166305R, E21B 4324

Patent

active

042805597

ABSTRACT:
A process for the in situ recovery of viscous oil from a subterranean formation is disclosed. Steam is injected into the formation via a well, permitted to soak, and heated fluids including heated viscous oil are produced sufficient to create a substantial fluid mobility in the formation. Then a hydrocarbon solvent having a low concentration of low molecular weight paraffinic hydrocarbons is injected into the formation, and another steam injection, soak and oil production cycle is performed to recover significant additional quantities of oil.

REFERENCES:
patent: 3354958 (1967-11-01), Parker
patent: 3881550 (1975-05-01), Barry
patent: 4022277 (1977-05-01), Routson
patent: 4034812 (1977-07-01), Widmyer
patent: 4130163 (1978-12-01), Bombardieri
patent: 4133382 (1979-01-01), Cram et al.

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