Consolidation of hydraulic fractures employing a...

Details Consolidation of hydraulic fractures employing a... Consolidation of hydraulic fractures employing a...

C - Chemistry, Metallurgy

08

L

31/22, 166/22

C08L 75/04 (2006.01) C08K 3/36 (2006.01) C09K 8/56 (2006.01) C09K 8/80 (2006.01) E21B 43/22 (2006.01) E21B 43/267 (2006.01)

Patent

CA 2005460

CONSOLIDATION OF HYDRAULIC FRACTURES EMPLOYING A POLYURETHANE RESIN ABSTRACT A composition and method for consolidating proppant or gravel for propping fractures about, or for gravel packs for sand control in, wells in subterranean formations characterized by an improvement in which there is used a urethane quasi prepolymer consisting of dipropylene glycol and excess polymeric methylene diphenylene diisocyanate in a diluent, allowing to stand to form oligomers of polyurethane chains and admixing the urethane quasi prepolymer and diluent with a proppant and oil-based frac fluid and admixing a catalyst with the admixture of proppant and prepolymer and allowing to stand in the fractures, or well, until consolidation occurs. Also disclosed are specific examples of satisfactory frac fluids, diluents and catalysts and appropriate procedures for consolidation in one- or two- passes.

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