三维三分量地震资料试处理
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摘要
钱家营煤矿三维三分量地震勘探工区的地面及地下地质条件复杂、干扰波严重 ,增加了资料处理的难度。本文所述的处理使用了自行编制的模块 ,包括抽CCP道集、转换波速度分析及动校正和转换波静校正。在整个转换波资料处理中 ,特别注重振幅保真处理 ,不采用破坏振幅特征较强的去噪手段 ;检波点静校正考虑到射线传播的非对称路径 ;动校正采用的叠加速度谱密度为 10 0m× 10 0m ,空间速度场进行了平滑 ;偏移采用全波方程实现 ,所用速度是纵波与转换波偏移速度的最佳耦合速度。处理结果表明 ,剖面整体质量可满足解释要求
The geologic conditions of surface and underground of 3 D,3 C seismic prospecting working area in Qianjiaying coal miner are complex and interference wave is serious,increasing the difficulty for data processing.The processing expounded by the paper used the self made modules,including CCP gathers sorting,velocity analysis and NMO of converted wave (C wave) and static corrections of converted wave.During the total C wave data processing,we pay more attention to hi fi processing of amplitude,the noise removed tools that can destroyed the amplitude feature are not applied; the non symmetric ray path is considered in static correction at receiver points;the density of velocity spectrum adopted by NMO is 1000 m×1000m,the spatial velocity field is smoothed;the full wave equation is used for migration and optimum coupled velocity of P wave and converted S wave migrated velocity is used for migrated velocity.The processing results showed the quality of sections can meet the demand of exploration.
The geologic conditions of surface and underground of 3 D,3 C seismic prospecting working area in Qianjiaying coal miner are complex and interference wave is serious,increasing the difficulty for data processing.The processing expounded by the paper used the self made modules,including CCP gathers sorting,velocity analysis and NMO of converted wave (C wave) and static corrections of converted wave.During the total C wave data processing,we pay more attention to hi fi processing of amplitude,the noise removed tools that can destroyed the amplitude feature are not applied; the non symmetric ray path is considered in static correction at receiver points;the density of velocity spectrum adopted by NMO is 1000 m×1000m,the spatial velocity field is smoothed;the full wave equation is used for migration and optimum coupled velocity of P wave and converted S wave migrated velocity is used for migrated velocity.The processing results showed the quality of sections can meet the demand of exploration.
引文
[1] 张中杰,滕吉文.多波多分量地震探测技术.地震各向异性学术研讨会论文摘要集(自然基金委,中国科学院地球物理研究所),1998,106～110
[2] 杨德义,王斌贝,邢春颖.多分量地震数据采集中的微动信号监控.2000地球物理学会年刊,2000,30
[3] 何樵登,张中杰.横向各向同性介质中地震波及其数值模拟.长春:吉林大学出版社,1996
[4] HH普济廖夫.横波和转换波地震勘探.北京:石油工业出版社,1993
[5] 王斌贝,于光明,邢春颖.多分量地震数据处理中的抽道集研究.2000地球物理学会年刊,2000,79
[6] 安徽煤田物测队,中国科学院地质与地球物理研究所.钱家营矿区四、十采区三维三分量地震勘探研究,2000
[2] 杨德义,王斌贝,邢春颖.多分量地震数据采集中的微动信号监控.2000地球物理学会年刊,2000,30
[3] 何樵登,张中杰.横向各向同性介质中地震波及其数值模拟.长春:吉林大学出版社,1996
[4] HH普济廖夫.横波和转换波地震勘探.北京:石油工业出版社,1993
[5] 王斌贝,于光明,邢春颖.多分量地震数据处理中的抽道集研究.2000地球物理学会年刊,2000,79
[6] 安徽煤田物测队,中国科学院地质与地球物理研究所.钱家营矿区四、十采区三维三分量地震勘探研究,2000
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