【摘要】 地震波深度偏移方法是解决复杂地质构造成像的有力手段。为了研究复杂构造和速度分布条件下地震资料的叠后精确成像方法,分别采用相移加内插法、分裂步傅里叶法、傅里叶有限差分法和逆时偏移法对复杂的Marmousi模型进行叠后深度域偏移试验,计算结果表明,逆时偏移法具有最佳的成像效果,使得复杂构造成像清晰,绕射波场等完全收敛,计算精度和计算效率较高,是一种高精度的叠后深度偏移方法。更多还原

【Abstract】 Seismic wave depth migration method is a vital means for imaging complex subsurface structures.In order to study the accuracy of poststack seismic imaging methods under conditions of complex structure and velocity distribution,we tested four poststack depth migration methods:phase-shift plus interpolation method,split-step Fourier migration,Fourier finite-difference migration,and reverse-time migration on Marmousi model.Results show that the reverse-time migration method has the best imaging effect,which makes complex structure clear and definite,diffracted waves are completely converged,and its computing precision and efficiency is also high.Thus this method is the best choice for depth migration method.更多还原