Fracturing and tertiary recovery integrated construction method for low-permeable reservoir

Abstract

The invention discloses a fracturing and tertiary recovery integrated construction method for a low-permeable reservoir. The fracturing and tertiary recovery integrated construction method comprises the following steps that fracturing layer segment dividing is conducted on a target layer, the liquid amount of fracturing for the target fracturing layer segment is determined, the construction displacement of the target fracturing layer segment is determined, and a pump injection construction procedure for the target fracturing layer segment is determined; and hole injecting operating is conducted on the target fracturing layer segment, oil-displace fracturing fluid is injected into the target fracturing layer segment for fracturing construction, and wherein, the oil-displace fracturing fluidis the fracturing fluid with an oil-displacing agent added. Compared with the prior art, the technical scheme of the method has the beneficial effects that by adding the oil-displacing agent into thefracturing fluid, the integrated construction of fracturing and tertiary oil recovery is achieved, so that the production increasing effect of fracturing and tertiary oil recovery is achieved; and meanwhile, the water lock effect of a reservoir layer is also avoided, and the significant progress is achieved compared with an existing first fracturing and then tertiary oil recovery scheme.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to a low-permeability reservoir fracturing and three-production integrated construction method. Background technique [0002] The fracturing fluid can be divided into pre-fluid, sand-carrying fluid and displacement fluid according to the injection time and function. In the conventional fracturing process, a large amount of pre-fluid is usually injected first to rapidly increase the injection pressure. When the injection pressure is greater than the reservoir When the rock fracture pressure is reached, the reservoir fractures, and the sand-carrying fluid and displacement fluid are injected in the subsequent process, and the entire fracturing operation is finally completed. In the conventional fracturing process, the fracturing fluid only plays the role of pressurization and sand-carrying. [0003] The conventional tertiary oil recovery construction method is to...

AI Technical Summary

Problems solved by technology

The fracturing fluid should be flowed back before tertiary oil recovery, but it is difficult to achieve complete flowback of the fracturing fluid with the existing technology, which will cause a certain water lock effect on the reservoir and affect the subsequent injection of oil displacement agents, affecting oil displacement. Effect

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