摘要
本文提出了一种新的基于最大能量震源波场的平面波叠前深度偏移方法。该方法保留了平面波偏移方法的优点 ,即在成像过程中 ,通过同时延拓频率域稀疏采样的平面波震源和最大能量旅行时 ,求取震源波场中的最大能量部分 ,从而显著地提高了平面波叠前深度偏移的效率。利用震源波场中的最大能量部分成像 ,还保证了较高的成像精度。 Marmousi模型的试算结果表明 ,在复杂构造情况下 。
The method for plane wave prestack depth migration using the maximum energy part of source wavefield is presented in the paper. This method has the advantage of plane wave migration. The maximum energy part of wavefield of plane wave source is estimated by making continuations of both source wavefield sparsely sampled in frequency domain and travel time of the maximum energy, so that efficiency of plane wave prestack depth migration is improved significantly. The imaging of maximum energy part of source wavefield also ensures imaging accuracy. The trial result of Marmousi model shows that in the case of complicated geological structure, the processing result of the method may be as good as the result obtained by prestack depth migration of full wavefield plane wave.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2000年第3期283-289,共7页
Oil Geophysical Prospecting
关键词
叠前深度偏移
平面波
地震勘探
地震数据处理
prestack depth migration, plane wave migration,maximum energy, sparse sampling, Marmousi modelSun Peiyong,Research Institute,Buresau of Oil Geophysical Prospecting, Zhuozhou City, Hebei Province, 072750,China
