Chemically induced stimulation of subterranean carbonaceous form

Details Chemically induced stimulation of subterranean carbonaceous form Chemically induced stimulation of subterranean carbonaceous form

1997-09-22

1999-10-19

Suchfield, George

Wells

Processes

Cyclic injection then production of a single well

166245, 166268, 166271, 1663051, 166308, E21B 4317, E21B 4326, E21B 4327, E21B 4340

Patent

active

059672331

ABSTRACT:
A method for increasing the production of methane from a subterranean carbonaceous formation by chemically stimulating the formation of additional free surface area or cleats in the organic constituents of the formation and by causing inorganically adsorbed methane to be released from contained clay-minerals to increase the rate of methane desorption from the formation by injecting an aqueous oxidizing solution containing at least one oxidant into the formation, and thereafter producing methane from the formation at an increased rate. Suitable oxidants include peroxide, ozone, oxygen, chlorine dioxide, sodium hypochloride, water soluble salts of hypochlorous acid, perchlorate, chlorate, persulfate, perborate, percarbonate, permanganate, nitrate and combinations thereof.

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