增强型地热系统水力压裂与声发射监测室内实验研究

李庭樑; 曹文炅; 王亦伟; 郭剑; 蒋方明

doi:10.3969/j.issn.2095-560X.2019.03.006

新能源进展 >

2019 , Vol. 7 >Issue 3: 241 - 248

DOI: https://doi.org/10.3969/j.issn.2095-560X.2019.03.006

增强型地热系统水力压裂与声发射监测室内实验研究

李庭樑 ,
曹文炅 ,
王亦伟 ,
郭剑 ,
蒋方明

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1. 中国科学院广州能源研究所,广州 510640;
2. 中国科学院可再生能源重点实验室,广州 510640;
3. 广东省新能源和可再生能源研究开发与应用重点实验室,广州 510640;
4. 中国科学院大学,北京 100049

李庭樑（1993-）,男,硕士研究生,主要从事增强型地热系统数值模拟及相关实验研究。蒋方明（1973-）,男,博士,研究员,博士生导师,中国科学院广州能源研究所先进能源系统实验室主任。2001年博士毕业后曾先后就职于德国的IMM公司、葡萄牙的阿维诺大学、美国的宾州州立大学,2011年4月开始回国工作。目前主要从事电化学能量/动力系统、增强型地热系统、微热流体系统、燃料电池水、热管理,以及高效节能技术/产品等研发工作。

收稿日期: 2019-01-03

修回日期: 2019-02-23

网络出版日期: 2019-06-29

基金资助

中国科学院A类战略性先导科技专项项目（XDA21060700）; 国家自然科学基金项目（41702256）; 广东省自然科学基金项目（2017A030310328）; NSFC-广东省联合基金项目（U1401232）; 广东省自然科学基金重大基础培育项目（2014A030308001）; 广东省新能源和可再生能源研究开发与应用重点实验室基金项目（Y709JF1001）

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Laboratory Study on Hydraulic Fracturing and Acoustic Emission Monitoring of Enhanced Geothermal System

LI Ting-liang ,
CAO Wen-jiong ,
WANG Yi-wei ,
GUO Jian ,
JIANG Fang-ming

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1. Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China;
2. CAS Key Laboratory of Renewable Energy, Guangzhou 510640, China;
3. Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China;
4. University of Chinese Academy of Sciences, Beijing 100049, China

Received date: 2019-01-03

Revised date: 2019-02-23

Online published: 2019-06-29

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摘要

增强型地热系统（enhanced geothermal system, EGS）以干热岩热能的开采和利用为目的,正逐渐成为世界各国的重点研究对象。除了建立EGS野外试验场开展实际场地研究和技术示范外,亦有必要开展相关的室内实验研究,研究或验证相关关键技术,为野外场地建设提供理论基础和技术支持。本课题组自主研发了模拟地下真实环境的实验系统,开展了尺寸为400 mm × 400 mm × 400 mm的花岗岩水力压裂实验,通过声发射事件监测到的声发射数据,分析了裂缝的扩展规律,并进行了初步的水力连通实验,探讨了各采出井的流量分配,研究了从注入井到生产井的水力连通特性。结果可为数值模拟提供基础数据,为野外试验场地的建设提供参考。

关键词： 增强型地热系统; 干热岩; 水力压裂; 模拟实验; 声发射; 裂缝扩展

本文引用格式

李庭樑 , 曹文炅 , 王亦伟 , 郭剑 , 蒋方明 . 增强型地热系统水力压裂与声发射监测室内实验研究[J]. 新能源进展, 2019 , 7(3) : 241 -248 . DOI: 10.3969/j.issn.2095-560X.2019.03.006

Abstract

Aiming at extraction and utilization of hot dry rock thermal energy, enhanced geothermal system (EGS) is now a research focus across the world. Besides constructing field test site to carry out experimental studies and technical demonstration, it is also necessary to carry out lab tests to study or verify relevant key technologies. Laboratory tests can provide theoretical basis and technical support for the construction of field sites. Herein, a self-developed indoor experimental EGS was built to experimental system, which can simulate the underground pressure and temperature environment. With this experimental setup, the hydraulic fracturing experiment of a 400 mm × 400 mm × 400 mm granite block was carried out. Based on the monitored acoustic emission data, fracture growth and propagation in the rock block and perform preliminary hydraulic connection test were analyze. Flow distribution in the four surrounding production wells was evaluated, and the hydraulic connectivity from injection well to each production well was explored. The results obtained can provide basic data for numerical simulation and may have some reference value for the construction of real field test sites.

Key words： enhanced geothermal systems; dry hot rock; hydraulic fracturing; simulation experiment; acoustic emission; fracture propagation

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