山西潞安环能某矿三维地震数据二次处理技术应用
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摘要
基于2007年某煤矿三维地震提交的地质报告中存在的疑问,对该采区开展了二次处理技术研究,在分析原处理流程中发现原资料消除线形干扰不够干净;另外复杂的地震地质条件,导致静校正问题突出。针对干扰问题,在保真的基础上通过T-X域相干分析,提取相干噪音,达到剔除线形干扰的目;针对静校正问题采用了层析静校正及迭代剩余静校正技术,以解决长波长静校正问题;另外为提高地震数据处理精度和地震成像质量,避免出现假破碎带、伪构造等情况,在二次处理中还采用了地表一致性反褶积加零相位反褶积组合技术、高精度速度分析及动校正技术、叠前时间偏移技术等,有效消除了原地震报告中的错误解释。
In consideration of doubts existed in the 2007 CC coalmine geological report through 3D seismic prospecting,carried out secondary processing technical research for the winning area,and found that the elimination of original data linear interference is not clean enough;together with complex seismic-geologic conditions bring on conspicuous static correction problems.In allusion to interference issue,through T-X domain coherent analysis on the basis of fidelity,picked up coherent noises,the target to eliminate linear interference obtained.In allusion to static correction issue,using tomographic statics and iterative residual statics settled long wavelength static correction issue.In addition,to improve seismic data processing accuracy,seismic imaging quality,avoid false fracture zone and structure to be presented,combined technology of surface-consistent convolution plus zero-phase convolution,high precision velocity analysis and dynamic correction technology,prestack time migration technology etc.have been used in the secondary processing,thus eliminated wrong interpretations in the original seismic prospecting report effectively.
In consideration of doubts existed in the 2007 CC coalmine geological report through 3D seismic prospecting,carried out secondary processing technical research for the winning area,and found that the elimination of original data linear interference is not clean enough;together with complex seismic-geologic conditions bring on conspicuous static correction problems.In allusion to interference issue,through T-X domain coherent analysis on the basis of fidelity,picked up coherent noises,the target to eliminate linear interference obtained.In allusion to static correction issue,using tomographic statics and iterative residual statics settled long wavelength static correction issue.In addition,to improve seismic data processing accuracy,seismic imaging quality,avoid false fracture zone and structure to be presented,combined technology of surface-consistent convolution plus zero-phase convolution,high precision velocity analysis and dynamic correction technology,prestack time migration technology etc.have been used in the secondary processing,thus eliminated wrong interpretations in the original seismic prospecting report effectively.
引文
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