Method for plugging and subsequent treatment of subterranean for

Details Method for plugging and subsequent treatment of subterranean for Method for plugging and subsequent treatment of subterranean for

1980-05-19

1985-01-29

Suchfield, George A.

Wells

Processes

Distinct, separate injection and producing wells

166274, 166294, 166309, E21B 33138, E21B 4322

Patent

active

044959958

ABSTRACT:
Permeable portions of a subterranean formation are temporarily plugged by driving a foam formed by interacting an aqueous surfactant solution and dense fluid carbon dioxide into the permeable portions of the formation. In an embodiment of the invention the aqueous surfactant solution and the dense fluid carbon dioxide are introduced into the formation by sequential slug injections of the foam generating compositions. In another embodiment oil is displaced from an oil-bearing underground formation by plugging more permeable portions of the formation as described above, introducing a drive fluid into the formation and producing recovered oil and drive fluid from a well penetrating the formation.

REFERENCES:
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patent: 3185634 (1965-05-01), Craig, Jr. et al.
patent: 3195634 (1965-07-01), Hill
patent: 3342256 (1967-09-01), Bernard et al.
patent: 3376924 (1968-04-01), Felsenthal et al.
patent: 3412793 (1968-11-01), Needham
patent: 3893511 (1975-07-01), Root
patent: 4085800 (1978-04-01), Engle et al.
patent: 4088190 (1978-05-01), Fischer et al.
patent: 4113011 (1978-09-01), Bernard et al.
patent: 4159037 (1979-06-01), Varnon et al.

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