CO<sub>2</sub>羽流地热系统热开采过程热流固耦合模型及数值模拟研究

李静岩; 刘中良; 周宇; 李艳霞

doi:10.11949/j.issn.0438-1157.20180368

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CO₂羽流地热系统热开采过程热流固耦合模型及数值模拟研究

流体力学与传递现象 | 更新时间：2020-06-24

- CO₂羽流地热系统热开采过程热流固耦合模型及数值模拟研究
- Study of thermal-hydrologic-mechanical numerical simulation model on CO₂ plume geothermal system
- 化工学报 2019年70卷第1期页码：72-82
- 作者机构：
  
  北京工业大学环境与能源工程学院，传热强化与过程节能教育部重点实验室，北京 100124
- 作者简介：
  
  李静岩（1992—），男，硕士研究生，lijingyan@emails.bjut.edu.cn
  刘中良（1958—），男，博士，教授，liuzhl@bjut.edu.cn
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20180368
  中图分类号： TK 124
- 收稿：2018-04-03，
  
  修回：2018-11-07，
  
  纸质出版：2019-01-05
- 稿件说明：
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李静岩, 刘中良, 周宇, 李艳霞. CO₂羽流地热系统热开采过程热流固耦合模型及数值模拟研究[J]. 化工学报, 2019, 70(1): 72-82 DOI: 10.11949/j.issn.0438-1157.20180368.

LI Jingyan, LIU Zhongliang, ZHOU Yu, LI Yanxia. Study of thermal-hydrologic-mechanical numerical simulation model on CO₂ plume geothermal system[J]. CIESC Journal, 2019, 70(1): 72-82 DOI: 10.11949/j.issn.0438-1157.20180368.
李静岩, 刘中良, 周宇, 李艳霞. CO₂羽流地热系统热开采过程热流固耦合模型及数值模拟研究[J]. 化工学报, 2019, 70(1): 72-82 DOI: 10.11949/j.issn.0438-1157.20180368. DOI：

LI Jingyan, LIU Zhongliang, ZHOU Yu, LI Yanxia. Study of thermal-hydrologic-mechanical numerical simulation model on CO₂ plume geothermal system[J]. CIESC Journal, 2019, 70(1): 72-82 DOI: 10.11949/j.issn.0438-1157.20180368. DOI：

摘要

建立了CO

羽流地热系统（CPGS）热开采过程的热流固（THM）耦合模型，结合五点布井方案和多岩层三维几何模型，对一理想热储进行CPGS热开采数值模拟。分析了CPGS热开采过程中热储内的岩体变形特征及其对系统采热性能的影响，并研究了THM耦合下热储初始孔隙率对CPGS热开采的影响。结果表明：CPGS的运行会引起岩体的冷却收缩，造成热储表观体积的减小和热储孔隙率的增大，这有助于提高热储渗透率，加快地热开采速率，从而对地热开采产生积极影响。初始孔隙率越小，岩体变形对热开采的影响越明显。在假设初始渗透率相同的情况下，初始孔隙率越小，岩体变形引起的渗透率增幅越大，系统的热开采速率越快。

Abstract

A thermal-hydrologic-mechanical (THM) coupling model during the carbon dioxide plume geothermal system (CPGS) heat exploitation process was established. An ideal geothermal reservoir geothermal exploitation process was studied numerically

which combined with five-spot well pattern and a three-dimensional multi-rock formation geometric model. The rock deformation performance of CPGS geothermal exploitation process and the influence of rock deformation and geothermal reservoir initial porosity to CPGS heat exploitation were studied. The results showed that the rock significantly shrinkages during the process of the CPGS operation

reduces the volume

and increases the porosity of the reservoir. The deformation also helps increasing the permeability of thermal reservoir

accelerating the rate of exploitation process

and thus enhancing the geothermal exploitation process. While the porosity was lower

the influence of rock deformation was more obvious. Under the consumption that the initial permeability is the same

the smaller the initial porosity

the greater the increase in permeability caused by rock deformation

and the faster the thermal recovery rate of the system.

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CO2羽流地热系统热开采过程热流固耦合模型及数值模拟研究

Study of thermal-hydrologic-mechanical numerical simulation model on CO2 plume geothermal system

DOI：10.11949/j.issn.0438-1157.20180368

摘要

Abstract

关键词

Keywords

references

CO₂羽流地热系统热开采过程热流固耦合模型及数值模拟研究

Study of thermal-hydrologic-mechanical numerical simulation model on CO₂ plume geothermal system