Numerical simulation of seismic wave in deep geothermal rock mass

被引：0
作者：
Huang J. [1 ]
Liu Y. [1 ]
Li W. [2 ]
Zhang M. [3 ]
Wang Y. [4 ]
Yang Y. [5 ]
机构：
[1] School of Geosciences in China University of Petroleum(East China), Qingdao
[2] Shandong Energy Group, Jinan
[3] PetroChina Changqing Oilfield, Xi'an
[4] Shandong Energy Group South America Company Limited, Qingdao
[5] SINOPEC Shengli Oilfield Exploration and Development Research Institute, Dongying
来源：
Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | 2024年 / 48卷 / 01期
关键词：
deep geothermal rock; finite difference modeling; numerical simulation; seismic wave propagation mechanism;
D O I：
10.3969/j.issn.1673-5005.2024.01.007
中图分类号：
学科分类号：
摘要：
Deep geothermal resources represent a substantial form of renewable and clean energy. However, their geophysical response characteristics remain poorly understood, leading to a low success rate in exploring these resources. This study aims to investigate the propagation theory and wavefield characteristics of seismic waves within deep geothermal rock masses. To achieve this, two deep geothermal granite models were established, and numerical simulations of acoustic and elastic waves were implemented using the equivalent staggered grid finite difference method. The numerical simulation results reveal that the velocity of geothermal granite is much higher than that of surrounding rock due to temperature influences, which results in a phenomenon known as high-speed shielding and weakens the transmitted wave energy, consequently limiting the propagation of seismic waves within the lower part of the geothermal rock mass. In addition, compared with acoustic waves, elastic waves offer richer information about the wavefield. The conversion of wave mode and energy makes seismic records of elastic waves more complex than acoustic waves. © 2024 University of Petroleum, China. All rights reserved.
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页码：63 / 69
页数：6
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