Method for recovering oil from an underground formation

Details Method for recovering oil from an underground formation Method for recovering oil from an underground formation

1980-12-17

1982-12-21

Novosad, Stephen J.

Wells

Processes

Distinct, separate injection and producing wells

E21B 4322

Patent

active

043644317

ABSTRACT:
Method for recovering oil from an underground formation consisting of blocks of relatively low permeability with an oil-wet pore space containing oil surrounded by a fracture network of relatively high permeability by supplying to the fracture network an aqueous solution of a surfactant adapted for decreasing the surface tension between water and oil and displacing the oil from the oil-wet pore space of the blocks.

REFERENCES:
patent: 1651311 (1927-11-01), Atkinson
patent: 2792894 (1957-05-01), Graham et al.
patent: 3490527 (1970-01-01), Cook et al.
patent: 3498378 (1970-03-01), Stone et al.
patent: 3548941 (1970-12-01), Graham et al.
patent: 4040483 (1977-08-01), Offeringa
"Water-Imbibition Displacement--Can It Release Reluctant Spraberry Oil?" by E. R. Brownscombe, et al., Oil & Gas Journal, vol. 51, No. 28, p. 264.

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