Compositions and methods for reducing the permeability of underg

Details Compositions and methods for reducing the permeability of underg Compositions and methods for reducing the permeability of underg

1985-02-19

1987-05-05

Ivy, C. Warren

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524596, 524598, 527400, 527403, 166295, C08L 9900, C09K 1700, E02B 312

Patent

active

046633677

ABSTRACT:
Compositions and methods are used for reducing the permeability of high fluid permeability segments of underground strata, the compositions being injected into the high permeability segments in liquid form and there gelled to reduce the permeability of the segments. A first group of compositions has a pH of at least 4 and comprises a sulfited derivative of a tannin extract together with furfural, formaldehyde or a formaldehyde derivative. The second group of compositions comprises furfural and a gellable vegetable material which can be a tannin extract, a sulfited derivative of a tannin extract, a catechin, an alkaline extract of a coniferous bark or a lignin or sulfonated lignin derivative.

REFERENCES:
patent: 4246124 (1981-01-01), Swanson

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