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

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

Advances in New and Renewable Energy >

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

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

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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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

Cite this article

LI Ting-liang , CAO Wen-jiong , WANG Yi-wei , GUO Jian , JIANG Fang-ming . Laboratory Study on Hydraulic Fracturing and Acoustic Emission Monitoring of Enhanced Geothermal System[J]. Advances in New and Renewable Energy, 2019 , 7(3) : 241 -248 . DOI: 10.3969/j.issn.2095-560X.2019.03.006

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