Pipe string capable of carrying out light particle filling and sand prevention and water control production

Abstract

The invention relates to a pipe string capable of carrying out light particle filling and sand prevention and water control production. The pipe string comprises a filling packer, a filling conversiondevice, self-adaptive flow adjustment water controlling screen pipes and a pipe plug. When a filling tool is inserted into the filling conversion device and open the filling conversion device, filling liquid carrying light particles in the filling tool can enter the annular space between the self-adaptive flow adjustment water controlling screen pipes and a casing pipe under the guidance of the filling tool, wherein the annular space is filled with the light particles, and the filling liquid penetrates into the self-adaptive flow adjustment water controlling screen pipes and enters the annular space between the filling tool and the casing pipe under the guidance of the filling conversion device through a backflow gap between the filling tool and the filling packer. The pipe string can fill the annular space between the self-adaptive flow adjustment water controlling screen pipes and the casing pipe with the light particles to solve the difficulty of particle flow back in the later stage, and can realize sand prevention and water control with outstanding effect in the later stage of oil production and the oil production efficiency of the pipe string is improved.

Description

technical field [0001] The invention belongs to the technical field of petroleum, and in particular relates to a pipe string capable of implementing light particle filling and sand control and water control production. Background technique [0002] Gravel packing sand control technology is one of the advanced well completion technologies, which has the characteristics of outstanding sand control effect and long sand control period. However, the existing gravel packing sand control technology has the following problems when it is applied in special oilfields, such as Tahe Oilfield: First, due to the high specific gravity of gravel, it is very difficult to flow back in the later stage, although light particles can theoretically solve the problem. This problem, but people are not sure which structure of the pipe string is suitable for light particle packing; second, the oil layer also contains fine silt with small particle size and discretely distributed water bodies, among whi...

AI Technical Summary

Problems solved by technology

[0003] In order to solve all or part of the above problems, the purpose of the present invention is to provide a pipe string capable of carrying out light particle filling and sand control and water control production, not only can easily fill light particles into the self-adaptive flow control water control screen and In the annulus between the casings, it solves the problem of difficult flowback of gravel packing technology in the later stage, and can achieve outstanding sand control and water control with the help of filled light particles and self-adaptive flow control screens in the later stage of oil production. water to increase the oil recovery efficiency of this string

Images