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Selective inflow controller and well completion pipe string comprising same

A controller and selective technology, applied in drilling pipes, casings, production fluids, etc., can solve the problems of low fluid identification accuracy, unstable performance, and difficult processing, so as to improve oil well production, maintain balance, prevent The effect of bottom water rushing

Active Publication Date: 2018-04-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Selective inflow controller and well completion pipe string comprising same
  • Selective inflow controller and well completion pipe string comprising same
  • Selective inflow controller and well completion pipe string comprising same

Examples

Experimental program
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Embodiment Construction

[0030] The present invention will be further described below in conjunction with accompanying drawing.

[0031] figure 1 A selective inflow controller 100 according to the present invention is shown. Such as figure 1 As shown, the controller 100 includes a controller body 10 and a cover plate 21. The controller body 10 is configured as a rotationally symmetrical bar-shaped protrusion structure, and the cover plate 21 is sealed at the opening of the controller body 10 to form a seal. The inner cavity of the controller 100. There is an inlet 11 on the side wall of the controller body 10 for introducing fluid. A deflector block assembly 50 is disposed on the bottom surface of the controller body 10 . The deflector block assembly 50 has a first deflector block 18 , a second deflector block 181 , and a third deflector block 182 . A first radial liquid baffle 20 is provided at the downstream end of the first deflector block 18 . A second radial liquid baffle 22 is provided at ...

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PUM

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Abstract

The invention provides a selective inflow controller and a well completion pipe string comprising the same. The selective inflow controller comprises a box-type controller main body, a flow guiding channel formed in an inner cavity of the controller main body and communicating with an inlet, a flow dividing channel communicating with the flow guiding channel, an accelerating flow jetting channel communicating with the flow guiding channel, a flow outlet channel communicating with the flow dividing channel and the accelerating flow jetting channel, and an outlet formed in the controller main body and communicating with the flow outlet channel, wherein the inlet is formed in the side wall of the box-type controller main body. An inlet of the flow dividing channel is formed between the inletand an inlet of the accelerating flow jetting channel, and the connecting position of the accelerating flow jetting channel and the flow guiding channel is smoother than the connecting position of theflow dividing channel and the flow guiding channel; and thus bottom water onrush due to 'heel end effect' and 'local high permeability' can be effectively prevented by using the controller, balancingof the inflow profile of a shaft can be kept advantageously, the water-free oil production period is prolonged, and the oil well yield is increased.

Description

technical field [0001] The invention relates to well completion operations in oil and gas reservoirs, in particular to a selective inflow controller and a well completion pipe string containing it. Background technique [0002] In horizontal wells in bottom water reservoirs, bottom water coning problems caused by "heel effect" and "local high permeability of reservoirs" are common. After bottom water coning occurs in a horizontal well, the water cut rises rapidly, the production drops significantly, and the productivity of the oil well is greatly affected. In order to solve the problem of bottom water coning, it is necessary to balance the inflow profile of the formation fluid along the wellbore, and limit the inflow of the wellbore at the heel and the high permeability zone. [0003] At present, the main methods of water-controlled well completion include variable distance and segmented perforation completion, segmented variable density perforation completion, central tube...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/12E21B17/00E21B43/25
CPCE21B17/006E21B43/12E21B43/25
Inventor 翟羽佳赵旭姚志良李晓益朱明侯倩段友智庞伟刘欢乐贺英
Owner CHINA PETROLEUM & CHEM CORP
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