Actively adjustable self-adaption current regulating and water controlling oil extracting device

Abstract

The invention discloses an actively adjustable self-adaption current regulating and water controlling oil extracting device. The device comprises a lengthwise extending base pipe and an adjustment mechanism capable of adjusting the aperture of an input part; the pipe wall of the base pipe is internally provided with a spiral channel spirally extending in the extending direction of the base pipe and provided with the input part communicated with the spiral channel, and the inner wall of the base pipe is provided with the input part making the spiral channel and the interior of the base pipe communicated; the adjustment mechanism can make the aperture of the input part and the flow of a fluid in a negative correlation. The actively adjustable self-adaption current regulating and water controlling oil extracting device can provide different resistance pressure drops under different flows for flow changes of the fluid at the same position, and therefore has wider applicability.

Description

technical field [0001] The invention belongs to the technical field of oilfield well completion, and relates to a flow regulating screen control water well completion technology, in particular to an actively adjustable self-adaptive flow regulating water control oil production device that balances the inflow profile, blocks water and stabilizes oil production. Background technique [0002] As an advanced technology for oil and gas field development, horizontal wells have been applied to most types of oil and gas reservoirs. In a homogeneous reservoir, the horizontal well is affected by the flow pressure drop during oil production, and the pressure drop and flow rate at the heel are much larger than those at the toe. In heterogeneous reservoirs, the heel-toe effect is particularly obvious due to the outburst of high-permeability fluids. The resulting uneven profile is prone to coning once it encounters water or gas, resulting in obstruction of fluid flow at the toe end and g...

AI Technical Summary

Problems solved by technology

[0008] The size or quantity of the above three inflow control devices must be set according to the fixed flow rate of the formation before or during well completion, and cannot be adjusted once it is put into production

But in reality, the flow rate at the same position in the formation will also change throughout the oil production process, and the required resistance will also change accordingly, and the pre-designed inflow controller may lose its effect

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