Production of bitumen from tar sands

Details Production of bitumen from tar sands Production of bitumen from tar sands

1975-06-06

1976-10-19

Leppink, James A.

Wells

Processes

Distinct, separate injection and producing wells

166 50, 166303, E21B 704, E21B 4324

Patent

active

039865576

ABSTRACT:
A method of producing bitumen from a subterranean tar sand formation characterized by the following muti-step process. First, a continuous wellbore having a second section thereof contained within the formation and a first and a third section extending said second section to the earth's surface is formed. Next, a perforated liner is inserted into the wellbore extending the entire length thereof and having perforations so positioned thereon to be adjacent the second section of the wellbore. Thereafter, a heated fluid is circulated through the wellbore, contacting the formation via the perforations, thereby reducing the viscosity of the bitumen contained therein rendering it mobile. Subsequently, the mobilized bitumen is recovered via the wellbore.

REFERENCES:
patent: 2271005 (1942-01-01), Grebe
patent: 2584605 (1952-02-01), Merriam et al.
patent: 2778603 (1957-01-01), McCune et al.
patent: 2974937 (1961-03-01), Kiel
patent: 3285350 (1966-11-01), Henderson
patent: 3338306 (1967-08-01), Cook
patent: 3386508 (1968-06-01), Bielstein et al.

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