Density-sensitive adaptive flow control valve

Abstract

The invention discloses a density-sensitive adaptive flow control valve, which comprises a base pipe, a flow passing supporting ring, a floating disc, a positioning disc, a locking ring, an end ring and an outer protective cover. According to the density-sensitive adaptive flow control valve, the opening degree of the valve can be automatically controlled according to the density difference of passing liquid or gas, when downhole fluid is high-density water, the opening degree of the flow control valve is decreased to achieve less water output, and when the downhole fluid is low-density oil, the opening degree of the flow control valve is increased to achieve more oil output, when gas with the lower density passes through, the opening degree of the flow control valve is decreased to achieve less gas output, thus water control and gas control without oil control are achieved, and the purposes of production increasing and efficiency improving of a production well are finally achieved.

Description

technical field [0001] The invention belongs to the technical field of petroleum and natural gas exploitation, in particular to a density-sensitive self-adaptive flow control valve used for well completion operations. Background technique [0002] In the process of oil and gas development, in order to increase the drainage area of ​​the production layer, horizontal wells are often used for development. Due to reservoir heterogeneity and fluid property differences, it is easy to cause premature water or gas breakthrough in horizontal wells, seriously affecting oilfield development benefits. At present, there are adaptive flow control valves based on fluid viscosity for water control in horizontal wells, which have certain pertinence for the production of high-viscosity crude oil fields, but are limited for use in low-viscosity crude oil fields, and cannot effectively control gas production. Therefore, in order to effectively control the water or gas output of oil wells and i...

AI Technical Summary

Problems solved by technology

Due to reservoir heterogeneity, fluid property differences, etc., it is easy to cause premature water or gas breakthrough in horizontal wells, seriously affecting oilfield development benefits

At present, there is an adaptive flow control valve based on fluid viscosity for water control in horizontal wells, which has a certain pertinence for the production of high-viscosity crude oil fields, but it is limited for use in low-viscosity crude oil fields and cannot effectively control gas production.

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