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1. (WO2015047263) SEQUENTIAL SURFACTANT TREATMENTS FOR ENHANCING FRACTURING FLUID RECOVERY

Pub. No.:    WO/2015/047263    International Application No.:    PCT/US2013/061817
Publication Date: Fri Apr 03 01:59:59 CEST 2015 International Filing Date: Fri Sep 27 01:59:59 CEST 2013
IPC: E21B 43/25
E21B 43/27
E21B 43/12
Applicants: HALLIBURTON ENERGY SERVICES, INC.
Inventors: WEAVER, Jim
MCCABE, Michael
Title: SEQUENTIAL SURFACTANT TREATMENTS FOR ENHANCING FRACTURING FLUID RECOVERY
Abstract:
Methods involving the sequential application of surfactants to improve fluid recovery and control fluid loss in conjunction with subterranean fracturing treatments are provided. In one embodiment, the methods comprise: introducing a first surfactant into a portion of a subterranean formation; allowing the first surfactant to increase the oil-wettability of at least a portion of a fracture face in the portion of the subterranean formation; ceasing the introduction of the first surfactant into the portion of the subterranean formation; introducing a second surfactant into the portion of the subterranean formation; and allowing the second surfactant to increase the water-wettability of the portion of the fracture face in the portion of the subterranean formation.