METHODS OF USING STABLE HYDROCARBON FOAMS

摘要

A method of treating a subterranean geological formation comprising hydro carbons comprising injecting a foam into the formation at a rate and pressur e sufficient to open at least one fracture therein and a method of completin g a well in a subterranean geological formation penetrated by a well bore co mprising introducing a foam into the well bore of the subterranean geologica l formation and carrying out a completion operation in the well bore of the subterranean geological formation. The foam comprises a liquid hydrocarbon a nd a nonionic polymeric surfactant comprising fluorinated repeating units, w herein the fluorinated repeating units have up to 5 perfluorinated carbon at oms, and wherein a one weight percent solution of the nonionic polymeric sur factant in kerosene has a foam half-life at 22 °C of at least 10 minutes.