Process for conformance control using a polymer flocculate

Details Process for conformance control using a polymer flocculate Process for conformance control using a polymer flocculate

1983-06-13

1985-03-12

Suchfield, George A.

Wells

Processes

Cementing, plugging or consolidating

166300, E21B 33138

Patent

active

045039127

ABSTRACT:
An aqueous solution containing a water soluble polymer and a nonalkaline aqueous solution containing a polyvalent cation are sequentially injected into the relatively highly permeable zones of a subterranean formation. The solutions preferentially enter the relatively highly permeable zones and form a flocculate in situ when the polymer and cation contact and mix in the connate water. Sequential injection may be repeated several times until the permeability of the relatively highly permeable zones is substantially reduced thereby improving conformance in the subterranean formation.

REFERENCES:
patent: 3762476 (1973-10-01), Gall
patent: 3809160 (1974-05-01), Routson
patent: 3949811 (1976-04-01), Threlkeld et al.
patent: 3952806 (1976-04-01), Trantham
patent: 3981363 (1976-09-01), Gall
patent: 4009755 (1977-03-01), Sandiford
patent: 4120361 (1978-10-01), Threlkeld et al.
patent: 4290485 (1981-09-01), Free et al.

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