Hydraulic fracturing process using polyethylene oxide based fracturing fluid

摘要: A formation is fractured by injecting at a pressure sufficient to fracture the an aqueous solution containing about 0.005 - 10 percent weight of high molecular (e.g., 50,000 6,000,000) polyalkylene oxide polymer and natural resin calcium lignosulfonate). Such highly viscoelastic, i.e., fluid when not agitated, but exhibits gel-like characteristic upon agitation.