Process to improve hydrocarbon recovery by decreasing injection

Details Process to improve hydrocarbon recovery by decreasing injection Process to improve hydrocarbon recovery by decreasing injection

1990-09-06

1991-07-23

Suchfield, George A.

Wells

Processes

Distinct, separate injection and producing wells

166275, 252 8554, C21B 4322

Patent

active

050335480

ABSTRACT:
An aqueous solution comprised of partially hydrolyzed polyacrylamide and an ethoxylated alcohol, is injected into a subterranean hydrocarbon bearing formation via an injection well followed by injection of a drive fluid. The solution displaces hydrocarbons from formation pores and the drive fluid pushes the displaced hydrocarbon and the aqueous solution toward a production well enhancing hydrocarbon production. The ethoxylated alcohol decreases solution viscosity and increases solution screen factors resulting in improved injectivity, improved mobility control and ultimately improved hydrocarbon production.

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R. R. Jennings et al., "Factors Influencing Mobility Control by Polymer Solution", SPE Paper No. 2867, 9th Biennial Production Techniques Symposium, Wichita Falls, Texas, May 14-15, 1970.
R. D. Sydansk, "Acrylamide-Polymer/Chromium(III)-Carboxylate Gels for Near Wellbore Matrix Treatments", SPE/DOE Paper No. 20214, SPE/DOE 7th Symposium for Enhanced Oil Recovery, Tulsa, Oklahoma, Apr. 22-25, 1990.

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