【摘要】 针对松辽盆地北部安达凹陷深层"两宽一高"(宽频带激发接收、宽方位观测、高密度接收)地震资料成像质量较差、分辨率和信噪比无法满足精细勘探地质需求的问题,以区域地质认识为指导,通过Q值扫描和高阶走时拟合算法建立了高精度等效Q模型,并通过倾角域偏移孔径优选技术得到时空变偏移孔径体,对"两宽一高"地震资料进行了稳相Q偏移处理。研究表明:处理后的成像精度大幅度提高,地层相互切割等成像假象消失;Omega叠前时间偏移剖面目的层频带为6～55 Hz,稳相Q偏移处理后的频带展宽为6～71 Hz,可满足精细储层预测及层序细分的地质研究需求。该技术将解释指导融入处理过程中,为深层复杂构造区高分辨率保真成像提供了新的解决方案。更多还原

【Abstract】 In view of the poor imaged quality of the deep BWH(Broadband excitation reception, Wide-azimuth observation and High-density reception) seismic data in Anda Sag of North Songliao Basin, and moreover the resulted problems that the resolution and SNR cannot meet the requirements of fine exploration geology, under the guidance of the regional geological understanding, with the help of Value Q scanning and high-order travel-time fitting algorithm, high-precision equivalent Q model was established, and furthermore by means of the optimizing technique of the angle-domain aperture, the time-space temporal-migration-aperture volume was obtained, the phase-stabilizing Q migration was processed for the BWH seismic data. The study shows that the imaging precision after the process is greatly improved and the imaging false images such as the formation intercut are disappeared; The target-formation frequency band of the pre-stack time-migration section processed by Omega is 6-55 Hz and the frequency band after the phase-stabilizing Q migration is 6-71 Hz, these results can meet the geological requirements of the fine reservoir prediction and sequence subdivision. The technique can integrate the interpretation guide into the processing process and provide a new solution for the high-resolution fidelity imaging in the deep complex structural area.更多还原