Sequentially flooding an oil-bearing formation with a surfactant

Details Sequentially flooding an oil-bearing formation with a surfactant Sequentially flooding an oil-bearing formation with a surfactant

1990-08-28

1991-05-14

Neuder, William P.

Wells

Processes

With indicating, testing, measuring or locating

166274, E21B 4322

Patent

active

050147838

ABSTRACT:
A surfactant solution is injected into an oil-wet fractured formation and becomes the preferred wetting phase of the matrix blocks in the formation thereby displacing oil from the matrix blocks into the fracture network. The formation is then flooded with a hot aqueous fluid to displace the oil from the fracture network to the surface while returning the matrix blocks to an oil-wet condition. The injection cycle is repeated until the formation is depleted.

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E. R. Brownscombe et al., "Water-Imbibition Displacement--Can It Release Reluctant Spraberry Oil?", The Oil and Gas Journal, Nov. 17, 1952, pp. 264-265 and 377-378.
C. M. Blair, Jr., "Field Evaluation of Interfacial Spreading Agent Using Cyclic Decline Curves", SPE 14906, SPE/DOE Fifth Symposium on Enhanced Oil Recovery of the Society of Petroleum Engineers and the Department of Energy, Tulsa, Okla., Apr. 20-23, 1986.
M. O. Amabeoku et al., "Temperature Effects on Low Tension Surfactant Flood Efficiency in Consolidated Sands", University of Southern California, pp. 223-237.
J. D. Akins, "Field Results of Adding Surfactant to Cyclic Steam Wells", SPE 12007m 58th Annual Technical Conference and Exhibition, San Francisco, Calif., Oct. 5-8, 1983.
G. Geopalkrishnan et al., "An Enhanced Oil Recovery Method: Injection of Steam with Surfactant Solutions", SPE 7109, American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc.

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