STATIC CORRECTION IN TIME-LAPSE SEISMIC DATA PROCESSING
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摘要: 时差、振幅、频率、相位差异是影响时延地震处理的主要因素。非一致性重复地震资料进行时延处理时,消除两期资料时差影响是做好后续处理工作的基础。在分析不同时期地震资料施工参数差异的基础上,解决了老资料未测地表高程对静校正的影响,利用初至层析反演技术,通过优选参与反演的偏移距,利用新、老资料初至共同反演得到了统一的近地表速度、厚度模型,在此基础上优化得到的静校正量最大程度地消除了两期资料时差的影响,为后续时延地震处理、分析工作奠定了基础。Abstract: Time shift,amplitude,frequency and phase difference are main factors influencing time-lapse seismic data processing. The elimination of the time difference is the primary step in non-repeatable time-lapse data processing.Based on the acquisition parameter a-nalysis of two seismic data,the authors have solved the static correction problem caused by the absence of measured elevation in old seismic data.Joint tomographic inversion of the two time-lapse data is used to obtain an uniform near surface model.As a result,the ap-plication of calculated statics removes the time shift of the two data effectively,which has laid a good foundation for the subsequent pro-cessing.
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