Exploitation and Application of the Ionic Equilibrium Fracturing Fluid

Abstract For the shortcomings of the fracturing fluid at president, the paper commenced from several aspects which are the salinity of the fracturing fluid, the ingredients of Inorganic ions, acidic or alkaline, surface or interfacial tension, insolubles and gel breaking residues, then combined them to form the ionic equilibrium fracturing fluid system. The pH and salinity have little influence on the system and there are no insolubles or gel breaking in the fracturing fluid. The pH of the liquid system is 6–6.5 which belongs to the weak acid. The fracturing fluid is the high salinity formation water which is compound with the 4% of KCl and its performance of crosslinking is good. The system has a good performance of heat and shear resistance in the environment of weak acidity and high salinity. The temperature of its heat resistance can be up to 85 ?. Introduction At present more than 90% of the fracturing fluid is water-based fracturing fluid and because of the good comprehensive economic, the water-based crosslinking fracturing fluid whose thickener is polymer plant gum occupies the dominant position. The field application of water-based fracturing fluid will go through four main processes: the compound of the fracturing fluid before being put into the well; the support of fracturing construction; contact and react with the formation; flow back after the fracturing. Among them, the first process not only determines the intuitive quality of the fracturing fluid on the ground, but also plays a decisive role in the second stage of fracturing construction; the stand or fall of the second process determines the effect of fracturing transformation.