Permeability reduction in subterranean reservoirs

Details Permeability reduction in subterranean reservoirs Permeability reduction in subterranean reservoirs

1981-12-21

1983-11-08

Novosad, Stephen J.

Wells

Processes

Distinct, separate injection and producing wells

166294, 166273, 166295, E21B 4322, E21B 33138

Patent

active

044136803

ABSTRACT:
A method for selectively reducing the permeability of the higher permeability zones of a subterranean reservoir having heterogeneous permeability, such permeability reduction occurring a substantial distance away from a well in which there is injected into the reservoir an aqueous solution or solutions of a water-soluble polymer, a material capable under certain conditions of at least partially cross-linking the polymer to form a gelatinous precipitate, and a water-soluble alkaline material in an amount sufficient to maintain the pH of the polymer-containing composition above about 9 until the composition has passed a substantial distance through the reservoir.

REFERENCES:
patent: 3687200 (1972-08-01), Routson
patent: 3762476 (1973-10-01), Gall
patent: 3825067 (1974-07-01), Vestal
patent: 3841399 (1974-10-01), Ryan
patent: 3949811 (1976-04-01), Threlkeld et al.
patent: 4009755 (1977-03-01), Sandiford
patent: 4043922 (1977-08-01), Palmer et al.
patent: 4069869 (1978-01-01), Sandiford
patent: 4332297 (1982-06-01), Sandiford

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