Solvent stimulation of viscous oil via a horizontal wellbore

Details Solvent stimulation of viscous oil via a horizontal wellbore Solvent stimulation of viscous oil via a horizontal wellbore

1988-12-08

1989-07-04

Suchfield, George A.

Wells

Processes

Separating material entering well

166 50, 1663051, E21B 4325, E21B 4340

Patent

active

048441589

ABSTRACT:
A two-step solvent stimulation method for producing heavy-oil from a formation wherein a horizontal wellbore is utilized. Said wellbore is filled with a solvent of a predetermined density. Next a displacement fluid having a density greater than said solvent is injected into the wellbore. Continued pumping of said displacement fluid causes the solvent having a lighter density to be displaced into said formation thereby enhancing the penetration of said solvent into the formation. Thereafter, pumping is terminated. Subsequently, the displacement fluid and solvent thinned heavy-oil are produced from said formation.

REFERENCES:
patent: 3263751 (1966-08-01), Kiel et al.
patent: 4067391 (1978-01-01), Dewell
patent: 4160481 (1979-07-01), Turk et al.
patent: 4334580 (1982-06-01), Vann
patent: 4372381 (1983-02-01), McMillen
patent: 4373585 (1983-02-01), Fitch et al.
patent: 4465138 (1984-08-01), Hunt, III
patent: 4531586 (1985-07-01), McMillen

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