Study and applications of preparing clean fracturing fluid using oilfield water

The new type of fracturing fluid system developed using composed of long chain alkyl quaternary ammonium salt surfactants and organic salt, which could be applied to oilfield water configuration clean fracturing fluid. Research results showed that the system of thickener concentration was 1.0%~1.5%, the concentration of or-ganic salt was 0.2%~0.5%, and could be used for 10~80 formation. The system has the characteristics of good sta-bility. The sand carrying ability was better than that of guar gum fracturing fluid system. The gel breaking perfor-mance using crude oil was good and the core damage rate was 5.26%. The system was good compatibility and mixed with formation water was no precipitation and flocculation. The clean fracturing fluid configuration using oilfield water was simple and with less species potion, which had obtained the good effect to increase production.The system not only solved the serious problem of water shortage in Shanbei region, also reduced the sewage dis-charge. It would have a good application prospect and popularization value.