Hole location cleaning assembly, unconventional reservoir hole location injection tool and method

Abstract

The invention relates to the technical field of oil and gas field development, and discloses a hole positioning cleaning component, an unconventional reservoir hole positioning injection tool and a method. The hole positioning and cleaning assembly includes a rack and a positioning member. The rack is arranged in an axial groove on the outer surface of the pipe column so as to be able to move axially. A first jet hole and a second hole are formed at intervals in the length direction of the rack. Two jet holes; the positioning part is used to be rotatably arranged on the outer surface of the pipe string, and the positioning part includes a tooth part meshing with the rack and an extension arm that rotates with the tooth part; wherein, when the positioning part rotates, it can drive the rack to move The first jet hole or the second jet hole communicates with the through hole on the bottom wall of the axial groove. The perforation positioning injection tool for unconventional reservoirs using this perforation positioning cleaning component can accurately position the perforation and completely remove the blockage in the perforation, and can realize the secondary reconstruction of the perforation, effectively reducing the near-wellbore zone of the wellbore. Seepage resistance, thereby restoring the productivity of the borehole, has a simple structure and high work efficiency.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field development, and in particular relates to a hole positioning cleaning component, an unconventional reservoir hole positioning injection tool and a method. Background technique [0002] Perforation is an operation that uses special energy-gathering equipment such as perforating bullets to enter the predetermined layer of the wellbore to open holes to allow the fluid in the downhole formation to enter the wellbore. Perforation is generally used in oil and gas fields and coal fields, and sometimes it is also used in the exploitation of water sources . In the process of perforating construction, the perforating bullets squeeze the formation around the ballistic trajectory, as well as factors such as formation sand production and heavy oil accumulation in the subsequent production process of shale oil reservoirs will cause the permeability and conductivity of the perforation hole to increase....

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the problem of the prior art that only part of the blockage can be cleaned out and the perforation holes cannot be thoroughly cleaned, and to provide an unconventional reservoir perforation positioning injection tool, the unconventional reservoir perforation positioning injection tool The tool can completely remove the blockage in the perforation hole, and realize the secondary reconstruction of the hole, effectively reducing the seepage resistance near the wellbore zone, thereby restoring the productivity of the old well

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