面向深部地热岩体的弹性波逆时偏移成像方法

P631.4; 地热能作为一种清洁能源正受到全世界的日益关注,因此对于深部地热岩体的高精度成像格外重要.传统的弹性波逆时偏移方法是利用耦合纵横波直接成像,从而得到耦合波场的成像结果;然而这种方法可能会出现串扰假象,导致成像结果不够清晰;为了解决这个问题,采用基于解耦的弹性波方程,实现纵横波场的分离;通过利用内积成像条件,对两个典型的干热岩模型进行数值测试.结果表明,相较于耦合波场成像结果,基于解耦方程分离得到的弹性波成像剖面具有更清晰的同相轴,深部能量更加均衡,该方法能够实现对深部地热岩体的高质量成像....

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Published in中国石油大学学报（自然科学版） Vol. 48; no. 1; pp. 55 - 62
Main Authors 黄建平, 杨秀金, 张鑫, 王扬州, 陈亮, 高建明
Format Journal Article
LanguageChinese
Published 中国石油大学(华东)地球科学与技术学院,山东青岛 266580%山东能源集团南美有限公司,山东青岛 266000 2024
Subjects
深部地热岩体
elastic wave imaging
弹性波成像
separation of P-and S-waves
reverse time migration
逆时偏移
deep geothermal rock mass
纵横波分离
Online AccessGet full text
ISSN1673-5005
DOI10.3969/j.issn.1673-5005.2024.01.006

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Abstract P631.4; 地热能作为一种清洁能源正受到全世界的日益关注,因此对于深部地热岩体的高精度成像格外重要.传统的弹性波逆时偏移方法是利用耦合纵横波直接成像,从而得到耦合波场的成像结果;然而这种方法可能会出现串扰假象,导致成像结果不够清晰;为了解决这个问题,采用基于解耦的弹性波方程,实现纵横波场的分离;通过利用内积成像条件,对两个典型的干热岩模型进行数值测试.结果表明,相较于耦合波场成像结果,基于解耦方程分离得到的弹性波成像剖面具有更清晰的同相轴,深部能量更加均衡,该方法能够实现对深部地热岩体的高质量成像.
AbstractList P631.4; 地热能作为一种清洁能源正受到全世界的日益关注,因此对于深部地热岩体的高精度成像格外重要.传统的弹性波逆时偏移方法是利用耦合纵横波直接成像,从而得到耦合波场的成像结果;然而这种方法可能会出现串扰假象,导致成像结果不够清晰;为了解决这个问题,采用基于解耦的弹性波方程,实现纵横波场的分离;通过利用内积成像条件,对两个典型的干热岩模型进行数值测试.结果表明,相较于耦合波场成像结果,基于解耦方程分离得到的弹性波成像剖面具有更清晰的同相轴,深部能量更加均衡,该方法能够实现对深部地热岩体的高质量成像.
Abstract_FL Geothermal energy is gaining global attention as a clean energy source,underscoring the significance of precise imaging of deep geothermal reservoirs.The conventional elastic reverse time migration(E-RTM)technique relies on direct imaging of coupled P-and S-waves,which often leads to imaging artifacts and unclear images.In this study,we propose an approach based on the decoupled elastic wave equation to independently handle P-and S-wavefields.We apply this approach to two typical hot dry rock models using inner product imaging conditions.The numerical simulations demonstrate that the de-coupled elastic wave imaging profiles provide clearer event representations and a more evenly distributed energy profile in the deeper regions compared to imaging results obtained from coupled wavefields.This method showcases the potential for achie-ving high-quality imaging of deep geothermal reservoirs.
Author 黄建平
杨秀金
王扬州
陈亮
高建明
张鑫
AuthorAffiliation 中国石油大学(华东)地球科学与技术学院,山东青岛 266580%山东能源集团南美有限公司,山东青岛 266000
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Author_FL CHEN Liang
WANG Yangzhou
ZHANG Xin
HUANG Jianping
GAO Jianming
YANG Xiujin
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DocumentTitle_FL Elastic wave reverse time migration imaging method for deep geothermal rock mass
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Keywords 深部地热岩体
elastic wave imaging
弹性波成像
separation of P-and S-waves
reverse time migration
逆时偏移
deep geothermal rock mass
纵横波分离
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PublicationTitle 中国石油大学学报（自然科学版）
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PublicationYear 2024
Publisher 中国石油大学(华东)地球科学与技术学院,山东青岛 266580%山东能源集团南美有限公司,山东青岛 266000
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Snippet P631.4; 地热能作为一种清洁能源正受到全世界的日益关注,因此对于深部地热岩体的高精度成像格外重要.传统的弹性波逆时偏移方法是利用耦合纵横波直接成像,从而得到耦合波场...
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Title 面向深部地热岩体的弹性波逆时偏移成像方法
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