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基于非对称子波谱的自适应近地表Q值估计方法

ZHANG Xuliang WANG Naijian XU Yinpo XIAO Yongxin JIANG Tong ZHOU Huailai

石油地球物理勘探2025，Vol.60Issue(6)：1453-1462,10.
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石油地球物理勘探2025，Vol.60Issue(6)：1453-1462,10.DOI:10.13810/j.cnki.issn.1000-7210.20240334

基于非对称子波谱的自适应近地表Q值估计方法

Adaptive near-surface Q-value estimation method based on asymmetric wavelet spectrum

ZHANG Xuliang 1WANG Naijian 2XU Yinpo 2XIAO Yongxin 3JIANG Tong 3ZHOU Huailai4

作者信息

  • 1. School of Geophysics,Chengdu University of Technology,Chengdu,Sichuan 610059,China||Acquisition Technology Institution,BGP Inc.,Zhuozhou,Hebei 072751,China||HeBei Seismic Acquisition Technology Institute,Zhuozhou,Hebei 072751,China
  • 2. Acquisition Technology Institution,BGP Inc.,Zhuozhou,Hebei 072751,China||HeBei Seismic Acquisition Technology Institute,Zhuozhou,Hebei 072751,China
  • 3. Acquisition Technology Institution,BGP Inc.,Zhuozhou,Hebei 072751,China
  • 4. School of Geophysics,Chengdu University of Technology,Chengdu,Sichuan 610059,China||State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu,Sichuan 610059,China
  • 折叠

摘要

Abstract

In seismic exploration,owing to the viscoelastic properties of subsurface media,the seismic wave-field experiences substantial attenuation,loss of high-frequency components,and phase distortion during propa-gation.This is because energy is absorbed,which ultimately results in a reduction of the resolution and imaging accuracy of seismic data.Precisely acquiring the Q-value of the near-surface media and conducting inversion pro-cessing is a crucial approach to address this issue.Consequently,an adaptive near-surface Q-value estimation method based on the asymmetric wavelet spectrum is herein proposed.Initially,a synthetic wavelet is generated by taking the geometric mean of the input and output signals.Subsequently,an adaptive algorithm is introduced in light of the synthetic wavelet to determine the key parameters,thereby minimizing the errors arising from sub-jectively selecting constant parameters.Finally,a formula is derived to compute the near-surface Q-value,en-abling precise estimation of the Q-value.Both theoretical model validation and practical application outcomes demonstrate that the method presented in this study can automatically adapt to the changes in spectral asymme-try during the absorption attenuation of seismic wave propagation.It can more accurately fit various asymmetric source amplitude spectra,enhance the accuracy of Q-value modeling,and offer technical support for high-preci-sion seismic data processing.

关键词

地震勘探/Q值/非对称子波谱/近地表/吸收衰减

Key words

seismic exploration/Q-value/asymmetric wavelet spectrum/near-surface/absorption attenuation

分类

天文与地球科学

引用本文复制引用

ZHANG Xuliang,WANG Naijian,XU Yinpo,XIAO Yongxin,JIANG Tong,ZHOU Huailai..基于非对称子波谱的自适应近地表Q值估计方法[J].石油地球物理勘探,2025,60(6):1453-1462,10.

基金项目

本项研究受中国石油天然气股份有限公司科技项目"多物理场高精度油气地球物理探测技术与装备"(2023ZZ05)之课题"全波场地震采集理论、关键技术与核心装备"、中国石油东方物探公司科技项目"高效采集噪音压制及多属性近地表建模方法研究"(13-03-2022)和中国石油东方物探公司科技项目"物探技术与装备标准化测试平台研究"(02-03-2023)联合资助. （2023ZZ05）

石油地球物理勘探

OA北大核心

1000-7210

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