초록 ▼

A treatment for wells and/or subterranean formations in which a pre-treatment fluid is introduced prior to a polymer-containing treatment fluid, such as a hydraulic fracturing fluid. The pre-treatment fluid may contain an enzyme and/or oxidative breaker effective to degrade the polymer in the polyme

A treatment for wells and/or subterranean formations in which a pre-treatment fluid is introduced prior to a polymer-containing treatment fluid, such as a hydraulic fracturing fluid. The pre-treatment fluid may contain an enzyme and/or oxidative breaker effective to degrade the polymer in the polymer-containing treatment fluid. The enzyme or oxidative breaker of the enzyme pre-treatment fluid enhance degradation of polymer filter cake from the reservoir-side of the filter cake during flow-back of the treatment fluid.

대표청구항 ▼

[ What is claimed is:] [1.] A method for treating a subterranean formation, comprising:introducing a pre-treatment fluid into said subterranean formation, said pre-treatment fluid comprising at least one breaker;then introducing a polymer-containing treatment fluid comprising at least one polymer in

[ What is claimed is:] [1.] A method for treating a subterranean formation, comprising:introducing a pre-treatment fluid into said subterranean formation, said pre-treatment fluid comprising at least one breaker;then introducing a polymer-containing treatment fluid comprising at least one polymer into said subterranean formation; andthen removing fluid from said subterranean formation;wherein said breaker contacts said polymer as fluid is removed from said subterranean formation; and wherein said breaker is effective to degrade and remove said polymer as said fluid is removed from said subterranean formation.