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Numerical method for simulating transport process of temporary plugging agent in rough crack of hot dry rock

A numerical method and technology of temporary plugging agent, which is applied in the numerical field of simulating the transport process of temporary plugging agent in rough fractures of hot dry rock, and can solve the problems that the movement state of temporary plugging agent cannot be truly reflected

Active Publication Date: 2021-09-07
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In view of this, the purpose of the present invention is to overcome the deficiencies of the prior art, and provide a numerical method for simulating the transport process of the temporary plugging agent in the rough cracks of the hot dry rock, so as to solve the problem that the numerical simulation in the prior art cannot truly reflect the temporary plugging Problems with exercise status

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  • Numerical method for simulating transport process of temporary plugging agent in rough crack of hot dry rock
  • Numerical method for simulating transport process of temporary plugging agent in rough crack of hot dry rock
  • Numerical method for simulating transport process of temporary plugging agent in rough crack of hot dry rock

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Embodiment 1

[0102] see figure 1 , according to an embodiment of the present invention, a numerical method for simulating the transport process of temporary plugging agent in rough fractures of hot dry rocks, including:

[0103] Step S1, constructing a fracture geometric model, and determining the roughness of the fracture geometric model;

[0104] Step S2, determine the required mathematical model, including: continuous phase mathematical model, discrete phase mathematical model and cross-coupling equation; consider the fluid medium in the calculation area as a continuous phase, and solve it through the continuous phase mathematical model; treat the temporary plugging agent as For the discrete phase, it is solved by the mathematical model of the discrete phase; the interaction between the continuous phase and the continuous phase is solved by the SIMPLE algorithm; the interaction between the continuous phase and the discrete phase is solved by the cross-coupling equation;

[0105] Step S...

Embodiment 2

[0144] According to another embodiment of the present invention, a numerical method for simulating the transport process of temporary plugging agents in rough fractures of hot dry rocks includes the following five parts: input module initialization, fracture geometric model construction, mathematical model construction, two-way coupling Calculation process and output calculation results.

[0145] 1. Input module initialization:

[0146] Before starting the calculation, initialization settings are required. First, the initial velocity of the given fluid is 0.5m / s, the fluid viscosity is 3mPa·s, and the fluid density is 1000kg / m 3 ;Secondly, the injection speed of the temporary plugging agent is 0.5m / s, the diameter of the temporary plugging agent is 0.003m, and the density of the temporary plugging agent is 2500kg / m 3 and other information; then need to set boundary parameters, including inlet velocity of 0.5m / s, turbulence intensity of 5%, and hydraulic diameter of 0.012m; ou...

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Abstract

The invention relates to a numerical method for simulating the transport process of a temporary plugging agent in a rough crack of a hot dry rock, which studies transport process of the temporary plugging agent in the rough crack of the dry hot rock, constructs a rough fracture physical model, regards fluid as a continuous phase and regards the temporary plugging agent as a dispersed phase, not only considers influence of fluid flow on movement of the temporary plugging agent, but also considers the transport process of the temporary plugging agent in the rough crack of the hot dry rock. The influence of the temporary plugging agent movement on the fluid and the influence of the temperature change and the rough rack surface on the mechanical plugging performance of the temporary plugging agent are considered, so that the bidirectional coupling calculation of the continuous phase and the dispersed phase is realized, and the purposes of simultaneously considering the interaction of the continuous phase and the dispersed phase and accurately solving the fluid-solid bidirectional coupling problem are achieved. The motion of a single temporary plugging agent follows the Newton second law of motion, the motion equation of the temporary plugging agent is solved under a Lagrange coordinate system, and information such as the position, speed and stress condition of the temporary plugging agent at different moments is obtained, so that the defects of an Euler-Euler description method are overcome, and the motion process of the temporary plugging agent in a flow field is truly reflected.

Description

technical field [0001] The invention relates to the technical field of numerical simulation, in particular to a numerical method for simulating the transport process of a temporary plugging agent in rough fractures of hot dry rock. Background technique [0002] With the rapid development of the global economy, people's demand for energy is increasing. However, the conventional energy sources that people have relied on for a long time, such as coal, oil, natural gas, etc., are all non-renewable energy sources, and the use of these conventional energy sources will inevitably cause huge pollution to the human living environment. Therefore, scholars are actively looking for other clean, renewable new alternative energy sources. [0003] Hot dry rock is a clean and renewable hot rock energy source with no or very little water or steam inside. It is mainly composed of various metamorphic rocks or crystalline rocks. The more common rocks are biotite gneiss , granite, granodiorite...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F30/28G06F111/10G06F113/08G06F119/08G06F119/14
CPCG06F30/20G06F30/28G06F2111/10G06F2119/08G06F2113/08G06F2119/14
Inventor 汪道兵郑臣秦浩董永存韩东旭宇波
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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