A numerical simulation method for sand control screen pipe erosion in deep water gas well

A sand control screen and numerical simulation technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of not considering the erosion angle of discrete particles, and cannot accurately describe the erosion screen process, and achieve high Practical value and research value, cost saving, effect of short time consumption

Pending Publication Date: 2019-03-29
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

Each erosion model has its own applicable conditions. Among them, the empirical model describing the erosion of the screen takes all the sand particles as a whole and erodes the screen at the same angle,

Method used

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  • A numerical simulation method for sand control screen pipe erosion in deep water gas well
  • A numerical simulation method for sand control screen pipe erosion in deep water gas well
  • A numerical simulation method for sand control screen pipe erosion in deep water gas well

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[0044] It should be pointed out that the following detailed descriptions are all illustrative and are intended to provide further explanations for the application. Unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0045] It should be noted that the terms used here are only for describing specific implementations, and are not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate There are features, steps, operations, devices, components and / or combinations thereof;

[0046] Symbol explanation: ρ g Gas density, kg / m3; t time, s; ui, uj...

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Abstract

A numerical simulation method for sand control screen pipe erosion in deep water gas well includes dividing the erosion and wear process into gas-solid two-phase coupling flow and erosion and wear ofsand particle on wall surface according to the erosion and wear mechanism of sand particle on screen pipe. For the gas-solid two-phase coupled flow problem, firstly, the physical model of screen-pipebasin is constructed, because the gravel layer and screen-pipe filter unit are solid porous media, it is simplified to a porous media basin with certain pore throat size, permeability and porosity inthe physical model. Then, the gas-solid coupling motion model is introduced to describe the turbulent flow pattern of two-phase flow, and the two-phase flow field distribution is obtained. For the problem of sand erosion and wear on the screen filter unit, the physical model of screen hole and crevice basin is established, and the wide angle screen pipe erosion model of discrete particles is established. The boundary conditions of gas-solid two phases at the entrance of the screen hole and crevice basin are determined by combining the flow field distribution. The numerical simulation of sand erosion and wear rate is carried out.

Description

Technical field [0001] The invention discloses a numerical simulation method for the erosion of a sand control screen pipe in a deep water gas well. Background technique [0002] Deep-water gas reservoirs have low degree of compaction and loose reservoirs, and gas wells are easy to produce sand. In general, deep-water gas wells have high production rates and fast gas flow rates. Sand production has serious erosion and abrasion on screens, which can easily cause sand control failures in gas wells. And cause serious sand production. Sand production in oil and gas wells will cause a series of hazards, such as erosion and wear of downhole tubing strings and surface equipment, increased downhole operations, and decreased oil and gas well production. In severe cases, it may even cause tubing and oil pumps to be stuck, reservoirs buried, and oil and gas wells to stop production. At the same time, the operation cost of offshore deepwater gas wells is high, and the workover costs caused ...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/17G06F2119/06G06F30/20
Inventor 张锐郝思臻于亚楠李中郭永宾孟文波刘和兴张崇王志宇陈晓栋董钊任冠龙
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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