A Selective Inflow Control Device Based on Swirl Adding Resistance Effect

Abstract

The invention relates to a selective inflow control device based on the cyclone resistance increasing effect. The selective inflow control device based on the cyclone resistance increasing effect comprises a central tube, an outer cylinder, a controller main body and a flow guiding device, wherein the outer cylinder sleeves the center tube, an annular cavity is formed between the outer cylinder and the center tube, and one end of the outer cylinder is hermetically connected with the middle part of the center tube; the controller main body is fixed to the center tube, the controller main body is configured to enable fluid in the annular cavity to be introduced into the center tube, the controller main body is provided with two cyclone systems for identifying and distinguishing fluid and increasing resistance to the fluid in a distinguishing mode; and the flow guiding device is arranged in the annular cavity, the flow guiding device is fixed to the outer wall of the center tube and is configured to be capable of guiding the fluid to the controller main body. The selective inflow control device based on the cyclone resistance increasing effect has the function of accurately identifying fluid and can automatically adjust the current limiting resistance according to the change of the property, composition and inflow rate of the formation fluid, the bottom water coning phenomenon isprevented, and long-term stable production of horizontal wells is ensured.

Description

technical field [0001] The invention relates to a selective inflow control device based on the swirling flow resistance increasing effect, in particular to a water control and oil stabilizing device for identifying and distinguishing fluids and differentially increasing the resistance of the fluids. Background technique [0002] In horizontal wells in edge and bottom water reservoirs, due to the influence of wellbore friction pressure drop and formation heterogeneity, the inflow profile of formation fluid along the wellbore direction is unbalanced. In this way, the production pressure difference between the heel and the high-permeability zone is often much higher than that of the toe and the low-permeability zone, resulting in the inflow of the heel and the high-permeability zone being significantly larger than that of the toe and low-permeability zone, which easily causes edge and bottom water cone into. Once a water cone occurs, the formation water will quickly form a bre...

AI Technical Summary

Problems solved by technology

However, the existing AICD still has problems such as low fluid recognition accuracy, unstable performance, complex structure, and difficult processing.

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