Researches On Anti-swelling And Filtration-reducing Fracturing Fluid

Hydraulic fracture is an important measure to improve the flow quantity in the process offield develop, which has been applied to lots of field broad. Overall performance of fracturefluid is recognized more and more by Research Specialist Staff in the field as a critical elementin the hydraulic work. Low permeable sublayer is important exploitation target, which has metlots of troublesome problem including hydrostatic hydrating inflation, fracture fluid filtrationrate on a big scale, the row of poor, efficient low and so on. The article research and develop asystem of high-performance fracture fluid in allusion to high water sensitivity, High filtrationgeology feature. The system is found on the base of predecessors by means of investigation andsurvey fracture fluid home and abroad.The thesis proceed from the theory of reservoir damage through analysis the different types ofFracture fluid harm to water sensitivity reservoir, which research effectively targeted protectivemeasures to reduce the damage of the liquid phase and water undissolved substance residue inthe system of fracture fluid to reservoir, at the same time to enhance the fluid diversion offracturing crack. Through indoor study, the carboxymethyl hydroxypropyl guar gum andzirconium boron composite crosslinker were preferred, clay stabilizer PDA was synthesis. Anddevelop new oil-soluble filtrate reducer JLS-1. The static swelling rate of anti-swelling andfiltration-reducing fracturing fluid was much lower than conventional fracturing fluid in12h.Static swelling rate was7.1%. Filtration coefficient was lower6×10^-4m/min^0.5and filtration rateis less than0.9×10^-3m³/m². The viscosity was still more than60mPa·s in150min at90℃,residue content lower are40mg/l below and core damage rate is only15%.