Abstract：The principle of wave equation migration using phase shift plus interpolation is described briefly. Wave field extrapolation formula in such migration and final imaging equation are properly modified, with downward extrapolation operator redefined so that the imaging can be achieved by using fast Fourier transform (FFT). A new varied continuation step method is given which is different from usual one in time domain. The new method, which is different from usual varied continuation step method for time domain interpolation in phase shift plus interpolation migration, uses the downward extrapolation continuation step much longer than a quarter of an apparent wave length;therefore, the efficiency of such seismic migration is improved satisfactorily. The processing results of theoretical model, coal field and high dip seismic data show that this new method is f-k domain migration technique which is economic and suitable to the seismic data collected from the area where there are high dip formations and complicated geological structures.
涂国田. 相移插值法偏移中一种新的变延拓步长方法[J]. 石油地球物理勘探, 1992, 27(4): 444-453.
Tu Guotian. A new varied continuation step method in seismic migration by phase shift plus interpolation. OGP, 1992, 27(4): 444-453.
