Organic boron crosslinking agent(JSA-1)was synthesized from one-pot reaction of boric acid,n-butanol,ethylene glycol,and diethylenetriamine.The effects of guar gum mass fraction(based on the total mass of guar gum base solution),JSA-1 dosage(based on the total mass of guar gum base solution,the same below)and pH on the JSA-1 crosslinking performance were investigated.The results showed that higher guar gum mass fraction(0.09％～0.4％)led to better crosslinking state,shorter crosslinking time,higher apparent viscosity,and stronger temperature resistance of guar gum fracturing fluid,and JSA-1 dosage(0.04％～0.4％)exhibited the same influence as guar gum on the crosslinking state,crosslinking time,as well as temperature resistance of guar gum fracturing fluid,while higher pH(pH=4～14)achieved longer crosslinking time and stronger temperature resistance of guar gum fracturing fluid.Crosslinking agent JSA-1 could be prepared from a wide range of pH and guar gum mass fraction.In terms of low-temperature formula,it could effectively crosslink low mass fraction guar gum.When the guar gum base solution with a mass fraction of 0.13％was crosslinked with JSA-1,the apparent viscosity could reach 50 mPa.s at room temperature,100 s-1 shear.In terms of high-temperature formula,the fracturing fluid prepared by cross-linking mass fraction 0.4％guar gum base solution with JSA-1 had good temperature and shear resistance,and its apparent viscosity could stably maintained at around 300 mPa·s under 120 ℃,100 s-1 shear conditions.
关键词
胍胶压裂液/有机硼交联剂/合成/低浓度胍胶/性能评价/耐温耐剪切/油田化学品
Key words
guar gum fracturing fluids/organic boron crosslinking agents/synthesis/low concentration guar gum/performance evaluation/temperature and shear resistance/oil field chemicals
维普
万方数据