| 地热储层单裂隙岩体渗流传热数值模拟研究 |
| 投稿时间：2020-06-29 修订日期：2020-10-30 点此下载全文 |
| 引用本文：肖鹏,窦斌,田红,等.地热储层单裂隙岩体渗流传热数值模拟研究[J].钻探工程,2021,48(2):16-28.XIAO Peng,DOU Bin,TIAN Hong,et al. Numerical simulation of seepage and heat transfer in single fractured rock mass of geothermal reservoirs[J]. Drilling Engineering, 2021,48(2):16-28. |
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| 基金项目:国家自然科学基金项目“共和盆地储层干热岩人工裂隙与流体传热机理及热能效应研究”（编号：41674180）；国家重点研发计划“未固结砂岩热储层保护与增效钻完井技术及材料”（编号：2019YFB1504201）、“热储内多场耦合流动传热机理与取热性能优化”（编号：2019YFB1504203）、“砂岩储层水-热-化动态监测与模拟方法”（编号：2019YFB1504204） |
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| 中文摘要:研究地热储层裂隙岩体中的渗流传热过程对干热岩地热资源的开采具有重要的意义。本文以干热岩地热工程为背景，采用COMSOL Multiphysics数值模拟软件对地热储层单裂隙岩体中渗流传热机理进行了研究，并分析了流体注入速度和温度对岩体温度场的影响及其对干热岩地热工程的影响。研究发现流体参数对岩体温度场的影响主要体现在2个方面：一方面是对岩体温度场受扰动区域以及幅度的影响，另一方面是对岩体温度场达到稳态所需要时间的影响。流体注入速度的提升会降低系统的寿命和寿命期的出口法向总热量值，当考虑出口法向总热通量时，存在最佳流体注入速度，本研究中最佳流体注入速度为0.011 m/s。流体注入温度的提升会增加系统的寿命和系统的出口法向总热通量和总热量。研究为干热岩自热资源的开发与利用提供了理论依据，为工程运行参数的设计提供了参考依据。 |
| 中文关键词:地热储层 单裂隙 渗流传热 流体参数 数值模拟 干热岩开发 |
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| Numerical simulation of seepage and heat transfer in single fractured rock mass of geothermal reservoirs |
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| Abstract:Study of the percolation and heat transfer in fractured rock mass of geothermal reservoirs is of great significance to the exploitation of geothermal resources in hot dry rocks. In this paper， based on a hot rock dry geothermal project， the numerical simulation software of COMSOL Multiphysics is used to study the mechanism of seepage and heat transfer in single fractured rock mass of geothermal reservoirs， with analysis made of the influence of fluid injection velocity and temperature on the temperature field of rock mass and on the geothermal project of hot dry rocks. It is found that the influence of fluid parameters on the rock mass temperature field is mainly reflected in two aspects： influence on the disturbed region and amplitude of the rock mass temperature field， and influence on the time needed for the rock mass temperature field to reach the steady state. Increase of the fluid injection rate will reduce the system service life and the total outlet normal heat value during the service life. When considering the total outlet normal heat flux， there exists an optimal fluid injection rate， which is 0.011m/s in this study. Increase of fluid injection temperatures will increase the service life of the system and the total normal heat flux and total heat at the system outlet. This study provides a theoretical basis for the development and utilization of hot dry rock self-heating resources and a reference basis for the design of engineering operation parameters. |
| keywords:geothermal reservoir single fracture seepage and heat transfer fluid parameters numerical simulation hot dry rock development |
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