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在频率-波数域中,详细地推导出了对地震记录进行三维偏移归位的全部计算公式,并给出了能在中小型计算机上实施的程序结构和流程。对该方法的合理性用理论模型进行了试验,并给出了三维理论模型以及三维偏移理论剖面和三维偏移地震记录剖面及其它们的横向切片。通过实际计算以及对二维偏移和三维偏移两者效果的比较,表明三维偏移除了具有高偏移精度和高信噪比之外,而且还有效地压制了侧面波。
In the frequency-wavenumber domain, the full calculation formula of three-dimensional offset homing of seismic records is deduced in detail, and the program structure and flow that can be implemented on small and medium-sized computers are given. The rationality of this method was tested with a theoretical model, and a three-dimensional theoretical model and three-dimensional offset theoretical profiles and three-dimensional offset seismic recording profiles and their transverse slices were given. Through the actual calculation and the comparison of the effects of two-dimensional offset and three-dimensional offset, it shows that in addition to the high offset accuracy and high signal-to-noise ratio, the three-dimensional offset effectively suppress the side waves.