• 空间与固体地球物理 •

### 基于COMSOL的储层参数与层理缝对地热产能影响规律研究

1. 中国石油大学(华东)石油工程学院, 山东青岛 266580
• 收稿日期:2017-05-27 修回日期:2017-10-17 出版日期:2017-12-20 发布日期:2017-12-20
• 通讯作者: 郭天魁,男,1984年生,副教授,研究方向为水力压裂裂缝扩展及增产机理、增强型地热系统.(E-mail:guotiankui@126.com) E-mail:guotiankui@126.com
• 作者简介:曲占庆,男,1963年生,教授,博士生导师,研究方向为采油工程理论与技术、地热能开发利用.(E-mail:quzhq@upc.edu.cn)
• 基金资助:

中央高校基本科研业务费专项资金资助（17CX06008）、中央高校基本科研业务费专项资金资助（17CX02077）和青岛市应用基础研究计划项目（17-1-1-20-jch）联合资助.

### Research on the effect of geothermal reservoir parameters and bedding fractures on geothermal deliverability based on COMSOL

QU Zhan-qing, ZHANG Wei, GUO Tian-kui, SUN Jiang, TIAN Yu, LI Xiao-long

1. School of Petroleum Engineering, China University of Petroleum(East China), Shandong Qingdao 266580, China
• Received:2017-05-27 Revised:2017-10-17 Online:2017-12-20 Published:2017-12-20

Abstract:

Geothermal energy can be used for power generation and industrial, residential heating, and it has many advantages, such as environment-friendly, stable, abundant resources, renewability. Through the establishment of thermal coupled seepage model, considering the variation of physical property parameters with temperature, we studied the effect of reservoir parameters and bedding fractures on geothermal deliverability. The results indicate that the slow pressure recovery in the early stage of the development of geothermal storage is related to the temperature difference between the injection and production wells in the early stage of development; When the length of the naked hole is 40 m, the thickness of the controllable geothermal reservoir is 150 m; When the injection production system adopted one injection well and one production well, and the well spacing is 300 m, the controlled geothermal reservoir radius of the injection production system is 400 m; Matrix permeability exceeds a certain value will affect the development of geothermal exploitation longevity; Matrix porosity and matrix geothermal conductivity have little influence on the development, heat capacity is more conducive to the development; The number of bedding fractures and its flow conductivity has great effect on reservoir development. With increase of the number of the bedding fractures, the production mass flow increase, at the same time, faster the hot breakthrough velocity, eventually lead to reduction of the duration of development. And the unreasonable use of bedding fractures will block the swept area of injected fluid. The research results can provide strong technical support for the high-temperature geothermal reservoir selection.