Recovering viscous petroleum from thick tar sand

Details Recovering viscous petroleum from thick tar sand Recovering viscous petroleum from thick tar sand

1975-10-30

1976-11-30

Novosad, Stephen J.

Wells

Processes

Distinct, separate injection and producing wells

166 57, 166302, 166303, E21B 4324

Patent

active

039943410

ABSTRACT:
Recovery of viscous petroleum such as from thick tar sands is assisted using a closed-loop flow path from the earth's surface through a substantial portion of the formation for conducting hot fluid to reduce the viscosity of the petroleum in the formation to develop a potential passage in the formation outside the flow path into which a drive fluid is injected to promote movement of the petroleum to a production position.

REFERENCES:
patent: 1634235 (1927-06-01), Ranney
patent: 1634236 (1927-06-01), Ranney
patent: 2786660 (1957-03-01), Alleman
patent: 2980184 (1961-04-01), Reed
patent: 3024013 (1962-03-01), Rogers et al.
patent: 3205012 (1965-09-01), Dancy
patent: 3338306 (1967-08-01), Cook
patent: 3386508 (1968-06-01), Bielstein et al.
patent: 3881551 (1975-05-01), Terry et al.

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