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复杂地表复杂构造是近年来陆上地震勘探的重难点问题.其中,复杂构造成像问题可用叠前深度偏移技术如逆时偏移较好地解决,而地表起伏大、横向变速剧烈引起道间时差大问题则需要采用起伏地表偏移的思路.结合常规地震数据处理,本文提出一种基于起伏面的逆时偏移成像技术流程,该流程利用固定面与平滑起伏面高程差和替换速度将静校正后的叠前炮集反静校正到起伏面上,然后进行起伏面逆时偏移成像计算.将流程应用到模型数据和实际资料处理,结果均表明该流程在复杂地表复杂构造地震成像方面具有很好的效果.
Complicated surface complex structure is a heavy and difficult problem of onshore seismic exploration in recent years, in which the problem of complex structure imaging can be solved well by using prestack depth migration technology such as reverse time migration, and the surface fluctuation is large and the lateral speed change is violent, In order to solve the problem of large time difference, we need to adopt the idea of ups and downs of surface offset.According to the conventional seismic data processing, this paper presents a flow chart based on ups and downs of the reverse-time migration imaging technology, the process using fixed surface and smooth surface elevation difference and replacement speed The statically-corrected prestack shots were corrected to anti-statics on the ups and downs, and then the inverse time migration imaging was applied to the ups and downs. The flow was applied to the model data and the actual data processing. Has a very good effect.