After the production of oil wells to a certain stage, production capacity and permeability decreased, in order to enhance the oil discharge capacity, improve the production of oil wells, the hydraulic fracturing process technology was invented. The method of fracturing is divided into hydraulic fracturing and high-energy gas fracturing, hydraulic fracturing is the high-speed injection of fluid into the well by the ground high-pressure pump vehicle set, with the help of high pressure from the bottom of the well, so that the oil layer rock rupture cracks. In order to prevent the pump from stopping work, the pressure drops, the cracks close up on their own, in the injection liquid after the formation rupture, mixed into the sand several times larger than the density of the formation, with the fluid into the crack, and permanently stay in the crack, support ingress in the opening state, so that the oil flow environment can be improved for a long time. At present, hydraulic fracturing technology has been very mature, the effect of oil well production is obvious, has long been the preferred common technology. Especially for the oil circulation channel is very small, that is, the permeability is more than the bottom of the oil layer yield effect is particularly prominent.
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