油井生产到一定阶段后，产能和渗透率降低，为了增强排油能力，提高油井产量

After a certain stage of well production, productivity and reduce the permeability, in order to enhance the discharge capacity of the oil, increase oil production, the inventors fracturing technology. The method of hydraulic fracturing and fracturing sub-high-energy gas fracturing into two categories, high pressure hydraulic fracturing is ground by the high fluid pump EMU injection well by means of high pressure from bottom hold the reservoir and the fracture cracks. After the pump is stopped to prevent the pressure drop, self-collapse and fracture, the injection liquid after the formation fracture, mixed several times larger than the density of the formation sand, together with the fluid entering the fracture, and remain permanently in the fracture, the support cracks in the ON state, the oil flow is improved long-term environment. The current hydraulic fracturing technology is very mature, well stimulation effect is obvious, it has become a common technique of choice for people. Especially for small oil flow passage, i.e. the bottom of the reservoir permeability than the stimulation effect in particular.

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.

After the oil well production reaches a certain stage, the productivity and permeability decrease. In order to enhance the oil drainage capacity and increase the oil well production, people invented the fracturing technology. There are two kinds of fracturing methods: hydraulic fracturing and high-energy gas fracturing. Hydraulic fracturing is to inject the fluid into the well at high speed by means of the high-pressure pump truck group on the ground, and to fracture the reservoir rock by means of the high pressure held up at the bottom of the well. In order to prevent the pressure drop and the fracture self closing after the pump truck stops working, sand several times higher than the density of the formation is mixed into the injected fluid after the formation fracture, which enters the fracture together with the fluid, and stays in the fracture permanently, and the supporting fracture is in the open state, so that the oil flow environment can be improved for a long time. At present, the hydraulic fracturing technology has been very mature, and the effect of oil well stimulation is obvious, which has already become the preferred common technology. Especially for the oil flow channel is very small, that is to say, the effect of increasing production of the reservoir with lower permeability is particularly outstanding.<br>