Diffraction wave time-distance curve character and its application

doi:10.7523/j.issn.2095-6134.2011.2.010

Abstract

Abstract:

The diffraction wave time-distance curve equation with tilted interface was derived on the basis of geometric seismology theorem, and the existence and uniqueness of the crossover point between the reflection wave and diffraction wave was proved using two methods. Theoretical analyses show that the diffraction wave time-distance curve equation with tilted interface still has the character of hyperbolic curve and that irrespective of facets such as formational dip angle, the location of the minimum travel-time is still above the diffraction point, representing the general form of the horizontal interface condition. The critical parameter computational equation with the coordinates of the crossing point approaching the infinity was studied, and the numerical examples confirmed verified the conclusions. Errors in the conventional seismic interpretation based on practical seismic data were pointed out.

Key words: tilted interface, diffraction wave, time-distance curve equation, seismic wave, crossover point position

CLC Number:

P631.4

CHEN Ke-Yang. Diffraction wave time-distance curve character and its application[J]. , 2011, 28(2): 202-209.

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