Combined thermal and solvent stimulation

Details Combined thermal and solvent stimulation Combined thermal and solvent stimulation

1983-12-21

1985-05-28

Suchfield, George A.

Wells

Processes

Heating, cooling or insulating

166267, E21B 4324

Patent

active

045194548

ABSTRACT:
This invention provides a method for recovering heavy crude oil from an underground reservoir penetrated by a well, which comprises (a) heating the reservoir surrounding the wellbore with steam at a temperature below coking temperature but sufficient to increase the temperature 40.degree.-200.degree. F. above the reservoir temperature; (b) producing the formation until most of the injected water is produced; (c) injecting a liquid solvent having a ratio of crude viscosity to solvent viscosity of at least about 10 and in an amount ranging from about 5 to about 25 barrels per foot of oil-bearing formation; (d) producing a solvent-crude mixture; and (e) repeating steps (c) and (d).

REFERENCES:
patent: 3530939 (1970-09-01), Turner et al.
patent: 3881550 (1975-05-01), Barry
patent: 4034812 (1977-07-01), Widmyer
patent: 4250964 (1981-02-01), Jewell et al.
patent: 4268403 (1981-05-01), Buckman et al.
patent: 4280559 (1981-07-01), Best
patent: 4293035 (1981-10-01), Fitch
Heller, "Onset of Instability Patterns Between Miscible Fluids In Porous Media", Journal of Applied Physics, vol. 37, No. 4, 1566-1579, Mar. 15, 1966.

Affiliated with

Also associated with

Rating

Combined thermal and solvent stimulation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Combined thermal and solvent stimulation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Combined thermal and solvent stimulation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-863984