During the operation of acidizing and fracturing in the oilfield, the liquid entering the formation will cause the change of the water environment, so that the clay in the formation rock will expand, disperse and migrate, resulting in the formation of sand, blockage of the oil formation, and reduce the permeability.

JKN-CS is composed of small cationic quaternary amine salts, which is the most effective control of clay expansion in water-based drilling mud and fracturing fluid.