高精度可变面元三维地震勘探与实践
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摘要
可变面元三维地震观测系统采用了不同于常规三维观测系统的参数,可形成不同尺寸的面元资料。松辽盆地南部十屋断陷四五家子—八屋地区断裂系统发育,小断层较多。为了提高破碎小断层的成像精度,采用可变面元观测系统进行地震资料采集。在地震资料处理中,采用了层析静校正、多域去噪、地表一致性反褶积、CMP重排与基准面重新计算和叠前时间偏移等关键技术。对松辽盆地南部四五家子—八屋地区高精度可变面元三维地震资料进行了分析、处理和解释,解决了该区特殊的地质问题,取得了好的勘探成果。
The parameters of bin-divisible 3D seismic geometry are different from that of conventional 3-D geometry,which can obtain data with different bin size.The faulted system of Siwujiazi-Bawu area of Shiwu Fault Depression in the south of Songliao Basin is developed with many small faults.In order to improve the imaging accuracy of fractured small faults,bin-divisible geometry is utilized to acquire seismic data.In seismic data processing,some key techniques were used,including tomography statics,multi-domain denoising, surface consistent deconvolution,CMP rearrangement, stratum recalculation and pre-stack time migration.By analyzing, processing and interpreting the high-precision bin-divisible 3D seismic data in Siwujiazi-Bawu area,different kinds of geologic problems were solved,and good exploration results were achieved.
The parameters of bin-divisible 3D seismic geometry are different from that of conventional 3-D geometry,which can obtain data with different bin size.The faulted system of Siwujiazi-Bawu area of Shiwu Fault Depression in the south of Songliao Basin is developed with many small faults.In order to improve the imaging accuracy of fractured small faults,bin-divisible geometry is utilized to acquire seismic data.In seismic data processing,some key techniques were used,including tomography statics,multi-domain denoising, surface consistent deconvolution,CMP rearrangement, stratum recalculation and pre-stack time migration.By analyzing, processing and interpreting the high-precision bin-divisible 3D seismic data in Siwujiazi-Bawu area,different kinds of geologic problems were solved,and good exploration results were achieved.
引文
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[2]谭绍泉,刘光林.面元叠加地震采集技术[J].石油物探,2003,42(2):160-168
[3]赵生斌.可分面元三维观测系统设计研究[J].石油地球物理勘探,2000,35(3):333-338
[4]步长城,刘怀山.三维叠前时间偏移技术在永新高密度细分面元资料处理中的应用[J].海洋地质动态, 2008,24(12):34-38
[5]商建瓴,潘文峰,李套山,等.常规与面元细分三维观测系统浅析[J].石油地球物理勘探,1997,32(5): 709-71 6
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