起伏地表叠前深度偏移成像方法研究

地震勘探是探测地下介质情况的有效手段,但随着地震勘探目标复杂程度的提高,一般情况下的偏移成像技术已经难以应对复杂的地表情况。文章针对起伏地表情况下的地震勘探成像技术进行了深入研究,分析了起伏地表地震勘探中存在的困难,并根据地震波在真实介质中的传播特性以及波的可叠加性,利用“波场上延”基准面校正法,实现了在起伏地表情况下的叠前深度偏移成像,并利用理论模型进行测试,实现正确的偏移成像,验证文章所推导的偏移成像方法的有效性与精确性,使该方法有着用于实际资料处理的基础,具有较好的应用前景。

Seismic exploration is an effective means to detect the underground medium,but with the increasing complexity of seismic exploration target,the migration imaging technology has difficulty dealing with the complex surface conditions.In this paper,the imaging technology of seismic exploration under the condition of undulating surface is deeply studied,and the difficulties existing in the seismic exploration under the condition of undulating surface are analyzed.According to the propagation characteristics of seismic waves in real media and the superposition of waves,the prestack depth migration imaging under the condition of undulating surface is realized using the"wave field upward"datum correction method.The theoretical model is used to test,and the correct migration imaging is realized,which verifies the effectiveness and accuracy of the migration imaging method derived in this paper,so that the method has the basis for practical data processing and has a good application prospect.