Filling adaptive water control screen pipe

Abstract

The invention belongs to the oil and gas exploration technology field and discloses a filling adaptive water control screen pipe. A base pipe in a valve shield is provided with a large displacement filling hole and an adaptive flow control valve. The external portion of the large displacement filling hole is provided with a self-reset filling mechanism. Or a water-swelling rubber is arranged in anannulus between the base pipe and the valve shield. The self-reset filling mechanism is formed by a spring, a slide sleeve, a sealing ring, a soluble support sleeve and a positioning ring. When the soluble support sleeve supports the slide sleeve, the large displacement filling hole is in an open state. After the soluble support sleeve is corroded by water, the slide sleeve closes and seals the large displacement filling hole. After the water-swelling rubber is swelled in the water, a filling channel between the overflow hole channel of an overflow end ring and the large displacement fillinghole of the base pipe is closed. In the invention, the adaptive flow control valve and a large displacement filling mechanism are effectively combined in the screen pipe so that the large displacementdemand of filling work is satisfied and effective sand prevention and water control during a production process can be realized; and a water control completion effect is effectively improved, and a water control validity period is prolonged.

Description

technical field [0001] The invention belongs to the technical field of petroleum and natural gas exploitation, and in particular relates to an adaptive water control screen. Background technique [0002] In the process of oil and gas development, in order to increase the drainage area of ​​the production layer and realize the development of oil reservoirs under low production pressure difference, horizontal wells are often used for development. Due to reservoir heterogeneity, heel-toe effect, and fluid property differences, it is easy to cause early water breakthrough and rapid rise of water cut in horizontal wells. Excessive water cut in the oil well will slow down the oil production rate, and the oil field has to adopt the method of increasing the liquid production rate to maintain the production ratio index, and the huge liquid production rate increases energy consumption and increases the load of the platform water treatment equipment. It is easy to erode the sand contr...

AI Technical Summary

Problems solved by technology

[0004] 1. In the solid particle filling process, in order to ensure the carrying effect of the filling liquid, it is usually necessary to increase the filling displacement, and the flow control structure on the water control screen adopts the principle of small holes or flow channel throttling, which cannot pass through larger Displacement, filling effect is greatly affected;

[0005] 2. Due to the strong heterogeneity of the reservoir and the complex distribution of oil and water downhole, the passive flow control valve adopted cannot be adjusted after entering the well, and cannot be adaptively adjusted for the water outlet, so the water control effect is difficult to meet expectations

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