Method of recovering viscous petroleum from thick tar sand

Details Method of recovering viscous petroleum from thick tar sand Method of recovering viscous petroleum from thick tar sand

1975-12-22

1977-02-22

Purser, Ernest R.

Wells

Processes

Distinct, separate injection and producing wells

E21B 4324

Patent

active

040087654

ABSTRACT:
Recovery of viscous petroleum such as from thick tar sands is assisted using a closed-loop flow path formed in a well by concentric casing and tubular members extending 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 the well for production up a production flow line extending up the interior of the tubular member.

REFERENCES:
patent: 1012777 (1911-12-01), Wigle
patent: 2911047 (1959-11-01), Henderson
patent: 3338306 (1967-08-01), Cook
patent: 3412794 (1968-11-01), Craighead
patent: 3420302 (1969-01-01), Edwards
patent: 3493050 (1970-02-01), Kelley et al.
patent: 3608638 (1971-09-01), Terwilliger
patent: 3796265 (1974-03-01), Eickmeier
patent: 3908763 (1975-09-01), Chapman

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