Fracturing method for stimulation of wells utilizing carbon diox

Details Fracturing method for stimulation of wells utilizing carbon diox Fracturing method for stimulation of wells utilizing carbon diox

1985-02-19

1985-11-19

Guynn, Herbert B.

Compositions

Leather or fur treating

1663051, E21B 4326

Patent

active

045540829

ABSTRACT:
A method of fracturing a subterranean formation with a stabilized foamed fracturing fluid comprising from about 30 percent to in excess of about 95 percent by volume of carbon dioxide with the remainder comprising a substantially anhydrous liquid and a selected surfactant. The foam is formed in situ by injection of a stabilized liquid-liquid emulsion containing liquid carbon dioxide into a well bore penetrating the formation. The temperature and pressure of the emulsion is controlled to maintain the carbon dioxide in the liquid phase during injection into the well bore. Thereafter, the carbon dioxide is heated by the subterranean formation to a temperature above about 88.degree. F. at which time the stabilized emulsion spontaneously forms a high quality stabilized foam.

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Dunning et al., "Using Foaming Agents to Remove Liquids from Gas Wells", Bureau of Mines, 1961, pp. 12-13.

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