Method for oil recovery improvement

Details Method for oil recovery improvement Method for oil recovery improvement

1974-10-04

1976-06-29

Novosad, Stephen J.

Wells

Processes

Cementing, plugging or consolidating

166270, 166272, 166273, 166303, E21B 33138, E21B 4322, E21B 4324

Patent

active

039659860

ABSTRACT:
In a subterranean reservoir, a strata or zone of high permeability as compared to other stratas of the reservoir may be plugged by forming a solid gel in situ within the highly permeable strata. The gel plug is formed by injecting a colloidal silica suspension into the strata which is in a liquid state and contacting the suspension in situ with a surfactant. Upon mixing with the surfactant, the colloidal silica suspension forms a gel which effectively plugs the highly permeable zone blocking further fluid flow through the zone.

REFERENCES:
patent: 2411793 (1946-11-01), Kennedy et al.
patent: 2993809 (1961-07-01), Bueche et al.
patent: 3610339 (1971-10-01), Harvey
patent: 3701384 (1972-10-01), Routson et al.
patent: 3759326 (1973-09-01), Christopher et al.
patent: 3817330 (1974-06-01), Christopher et al.

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