Title: Fracturing method for stimulation of wells utilizing carbon dioyide based fluids
Application Number: 85102151 Application Date: 1985.04.01
Publication Number: 1008738 Publication Date: 1987.02.18
Approval Pub. Date: Granted Pub. Date: 1990.11.14
International Classifi-cation: C09K7/06,C09K7/08,E21B43/26,E21B43/267
Applicant(s) Name: Halliburton Co. Address:
Inventor(s) Name:
Attorney & Agent: CAO HENGXING
Abstract:
     A method of fracturing a subterranean formation with a stabilised 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 stabilised liquid-liquid emulsion containing liquid carbon dioxide into a well bore penetrating the formation. The temp. 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 temp. above about 88 deg.F (31 deg.C) at which time the stabilised emulsion spontaneously forms a high quality stabilsed foam.
Time: 8
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