Process for selective injection into a subterranean formation

Details Process for selective injection into a subterranean formation Process for selective injection into a subterranean formation

1980-11-12

1983-06-14

Novosad, Stephen J.

Wells

Processes

Placing fluid into the formation

166269, E21B 4316

Patent

active

043877702

ABSTRACT:
A treating fluid is selectively injected into a portion of subterranean formation by creating a fluid interface within a well bore penetrating and communicating with the formation. The fluid interface is created by injecting preflush fluids of differing densities into the well bore, and is maintained at a vertical location within the well bore adjacent the portion of the subterranean formation to be treated while treating fluid is injected into the well bore.

REFERENCES:
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patent: 2524933 (1950-10-01), Silverman
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patent: 3372752 (1968-03-01), Prater
patent: 3666014 (1972-05-01), Beard
patent: 4275788 (1981-06-01), Sweatman

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