Selective inflow controller and completion string containing it

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: 2020-03-31
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 completion string containing it
  • Selective inflow controller and completion string containing it
  • Selective inflow controller and completion string containing it

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] The present invention will be further described below with reference to the accompanying drawings.

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

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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 present invention relates to oil and gas reservoir completion operations, and more particularly, to a selective inflow controller and a completion string comprising the same. Background technique [0002] In horizontal wells in bottom water reservoirs, there are common bottom water coning problems caused by "heel end effect" and "local high permeability of the reservoir". After the bottom water coning occurs in horizontal wells, the water cut increases rapidly, the production decreases significantly, and the oil well productivity 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 to limit the wellbore inflow at the heel and high permeability zone. [0003] At present, the main methods of water control completion include variable-distance staged perforation completion, staged variable-density perforation completion, central tube completio...

Claims

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Application Information

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Patent Type & Authority Patents(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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