三分量地震数据处理技术及应用效果
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摘要
由于三分量地震数据具有特殊性,常规纵波地震数据的处理方法不能满足其需要。本文基于三分量地震数据的特点,对三分量转换波地震数据处理的几项关键技术进行了实用性研究,其中包括转换波水平分量的坐标旋转处理、转换波的共转换点(CCP)计算、转换波的静校正及剩余静校正、速度分析迭代计算和针对转换波的去噪技术等。文中展示了这些处理技术在中国西部T气田的三分量地震数据处理中取得的良好应用效果,在P波及PS转换波的最终处理剖面上可见目的层的P波和PS波的振幅和波形均有明显差异,这为综合应用纵横波数据联合解释、提高油气藏识别的精度和成功率提供了良好的基础数据,展现了三分量地震勘探的良好应用前景。
Since the speciality of 3-component (3C) seismic data, the common P-wave seismic data processing approaches do not meet its requirement. Based on the characteristics of 3C seismic data, the paper carried out the practical study of several key techniques in 3C converted wave seismic data processing, including coordinate rotation of horizontal component of converted wave, computation of common converted point (CCP) of converted wave, static correction and residual static correction of converted wave, iterative computation in velocity analysis and denoise techniques of converted wave. The paper showed the good application results achieved in 3C seismic data processing of T gas field in western part of China. The distinctive differences in P-wave and PS-wave amplitudes and waveforms can be seen at the targets of final processed P-wave and PS-wave sections, which provided good basic data for comprehensive application of P- and S-waves data to joint interpretation, improvement of identified precision and successful rate of reservoir, showing good application prospect of 3C seismic exploration.
Since the speciality of 3-component (3C) seismic data, the common P-wave seismic data processing approaches do not meet its requirement. Based on the characteristics of 3C seismic data, the paper carried out the practical study of several key techniques in 3C converted wave seismic data processing, including coordinate rotation of horizontal component of converted wave, computation of common converted point (CCP) of converted wave, static correction and residual static correction of converted wave, iterative computation in velocity analysis and denoise techniques of converted wave. The paper showed the good application results achieved in 3C seismic data processing of T gas field in western part of China. The distinctive differences in P-wave and PS-wave amplitudes and waveforms can be seen at the targets of final processed P-wave and PS-wave sections, which provided good basic data for comprehensive application of P- and S-waves data to joint interpretation, improvement of identified precision and successful rate of reservoir, showing good application prospect of 3C seismic exploration.
引文
[1]Tatham R H and McCormack M D.Multi-componentseismology in petroleum exploration.The Expanded Abstracts of SEG61st Ann Mtg,1991
[2]Tessmer Gand Behle A.Common reflection point data-stacking technique for converted waves.Geophysical Prospecting,1988,36:671~688
[3]Thomsen L.Converted-wave reflection seismology over inhomogeneous anisotropic media.Geophysics,1999,64(3):678~690
[4]李彦鹏,谷跃民.利用上行透射转换波计算横波静校正量.CPS/SEG2004(北京)国际地球物理会议论文集,114~116
[5]Gaiser J E.Applications for vector coordinate systems of3-Dconverted-wave data.The Leading Edge,1999,18,1290~1300
[6]郭向宇等.PS转换波共转换点的几种计算方法及实际应用.石油物探,2002,(2):141~143
[7]Deng Zhi wen et al.Converted wave seismic exploration&static correction.The Expanded Abstracts of SEG74th Ann Mtg,2004
[2]Tessmer Gand Behle A.Common reflection point data-stacking technique for converted waves.Geophysical Prospecting,1988,36:671~688
[3]Thomsen L.Converted-wave reflection seismology over inhomogeneous anisotropic media.Geophysics,1999,64(3):678~690
[4]李彦鹏,谷跃民.利用上行透射转换波计算横波静校正量.CPS/SEG2004(北京)国际地球物理会议论文集,114~116
[5]Gaiser J E.Applications for vector coordinate systems of3-Dconverted-wave data.The Leading Edge,1999,18,1290~1300
[6]郭向宇等.PS转换波共转换点的几种计算方法及实际应用.石油物探,2002,(2):141~143
[7]Deng Zhi wen et al.Converted wave seismic exploration&static correction.The Expanded Abstracts of SEG74th Ann Mtg,2004
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