Wells – Processes – Distinct – separate injection and producing wells
Patent
1988-01-29
1989-07-18
Neuder, William P.
Wells
Processes
Distinct, separate injection and producing wells
166274, E21B 4370
Patent
active
048484660
ABSTRACT:
A three-stage, hybrid solvent and water injection process is provided for the enhanced oil recovery from an oil-bearing formation. The three-stage process includes the sequential steps of: (i) injecting part of a selected total amount of solvent into the formation in a "single slug" injection stage, (ii) injecting the remainder of the total amount of solvent with water into the formation, in a water-alternating-gas (WAG) injection process, and (iii) injecting water into the formation until the water content in the produced mixture of oil and water reaches at least about 90 percent. The process includes deriving, for the selected total amount of solvent, a relationship between different first injection stage amounts of solvent and corresponding projected incremental oil recovery rates and selecting from such relationship the part of the solvent to be injected in the single slug injection stage. The preferred solvent is carbon dioxide, but such other solvents as liquid petroleum or natural gas may alternatively be used. The total amount of solvent is preferably less than about half the formation pore volume and the amount of solvent selected for the injection in the first stage is preferably less than about half of the total amount of solvent.
REFERENCES:
patent: 3065790 (1962-11-01), Holm
patent: 3207217 (1965-09-01), Woertz
patent: 3249157 (1966-05-01), Brigham et al.
patent: 3605893 (1971-09-01), Dauber
patent: 4694904 (1987-09-01), Sergul et al.
patent: 4709759 (1987-12-01), Bock et al.
patent: 4711304 (1987-12-01), Boeke et al.
patent: 4714113 (1987-12-01), Mohrot et al.
Hackler Walter A.
Lambert Howard
Neuder William P.
Union Oil Company of California
Wirzbicki Gregory F.
LandOfFree
Enhanced oil recovery using a three-stage injection of solvent a does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Enhanced oil recovery using a three-stage injection of solvent a, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Enhanced oil recovery using a three-stage injection of solvent a will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-164384