Inverse modeling of EGS heat reservoir based on micro-seismic data and analysis of its heat recovery performance

doi:10.11949/j.issn.0438-1157.20180769

CIESC Journal ›› 2018, Vol. 69 ›› Issue (12): 5001-5010.DOI: 10.11949/j.issn.0438-1157.20180769

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Inverse modeling of EGS heat reservoir based on micro-seismic data and analysis of its heat recovery performance

LI Tingliang^1,2,3,4, HUANG Wenbo^1,2,3, CAO Wenjiong^1,2,3, JIANG Fangming^1,2,3

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

Received:2018-07-09 Revised:2018-09-12 Online:2018-12-05 Published:2018-12-05
Supported by:
supported by the National Natural Science Foundation of China (41702256), the Natural Science Foundation of Guangdong Province (2017A030310328), the National Natural Science Foundation of China and Guangdong-Province Joint Project (U1401232) and the Key Scientific Development Project of Guangdong Province (2014A030308001).

EGS热储基于微震数据反演模化及其采热性能分析

李庭樑^1,2,3,4, 黄文博^1,2,3, 曹文炅^1,2,3, 蒋方明^1,2,3

1. 中国科学院广州能源研究所先进能源系统实验室, 广东广州 510640;
2. 中国科学院可再生能源重点实验室, 广东广州 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, 广东广州 510640;
4. 中国科学院大学, 北京 100049

通讯作者: 蒋方明
基金资助:
国家自然科学基金项目（41702256）；广东省自然科学基金项目（2017A030310328）；国家自然科学基金-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）。

Abstract

Abstract:

The characteristics of artificial heat reservoir have a decisive influence on the performance of enhanced geothermal systems (EGS). Accurately modeling of the structural characteristics of artificial heat reservoir is of great significance to the actual engineering of EGS. In this paper, we combine Habanero EGS geological information, micro-seismic data and other information, and reconstruct the spatial distribution of heat reservoir permeability and porosity. Based on the reconstructed heat reservoir, with an in-house three-dimensional dynamic simulation software developed previously, we further simulate the EGS heat extraction process and obtain the seepage field, temperature field and EGS heat extraction curve. When the fluid circulation rate is 15 kg/s, the production temperature of EGS with heterogeneous heat reservoir is 9.3℃ lower than that of the EGS with regional-homogeneous reservoir after 15 years of operation, and the total extracted heat of the former is 3.7% lower than that of the latter. These results reveal that the heterogeneity of the heat reservoir causes a significant decrease in the heat extraction performance of EGS.

Key words: enhanced geothermal systems, micro-seismic data, heat reservoir reconstruction, numerical simulation, permeability, heterogeneity, heat transfer

摘要：

人工热储的特性对增强型地热系统（EGS）的性能具有决定性影响，正确还原人工热储的结构特征对EGS实际工程具有重要意义。结合Habanero EGS地质、微震数据等信息，重建出热储的渗透率与孔隙率的空间分布，进一步采用自主开发的三维动态模拟软件，对热储中的渗流场、温度场和EGS的采热曲线进行数值模拟，并将其结果与分块均质热储EGS进行比较，当流体循环流量为15 kg/s，EGS运行到第15年时，非均质热储EGS的采出温度比分块均质热储EGS低9.3℃，前者的累积热采出量比后者低3.7%，热储的非均质性会导致EGS采热性能显著下降。

关键词: 增强型地热系统, 微震数据, 热储重建, 数值模拟, 渗透率, 非均质性, 传热

CLC Number:

TK521

LI Tingliang, HUANG Wenbo, CAO Wenjiong, JIANG Fangming. Inverse modeling of EGS heat reservoir based on micro-seismic data and analysis of its heat recovery performance[J]. CIESC Journal, 2018, 69(12): 5001-5010.

李庭樑, 黄文博, 曹文炅, 蒋方明. EGS热储基于微震数据反演模化及其采热性能分析[J]. 化工学报, 2018, 69(12): 5001-5010.

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Inverse modeling of EGS heat reservoir based on micro-seismic data and analysis of its heat recovery performance

EGS热储基于微震数据反演模化及其采热性能分析

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