The Research of Reverse-Time Migration for Cross-Hole Seismic

LI Zhe, CAO Xia, LIN Songhui, WEI Guohua

Abstract


Cross-hole seismic is the leading technology of development seismology, which is still developing and improving. With the development of down-hole acquisition equipment, cross-hole seismic acquisition technology is getting mature, providing better data for imaging. According to the features of cross-hole survey and cross-hole data, we put forward a reverse-time migration method which is suitable for the wave equation for cross-hole seismic data. We propose finite difference scheme of higher order, and then derive its stability condition in cross-hole seismic. The frequency dispersion problem in cross-hole seismic wave field extrapolation is also discussed. Cross correlation imaging condition is used to realize migration, and Laplace filter is applied to remove low-frequency noise from migration section. Thus finite-difference reverse-time migration method for cross-hole seismic is established. Finally, we build geological models with anomalous ellipsoids, and apply cross-hole seismic wave field simulation and migration to them, thus our method proves its effectiveness. When dealing with real cross-hole seismic data with this method, high-resolution migration sections can be achieved.
Key words: Cross-hole seismic; Reverse-time migration; Model test

Keywords


Cross-hole seismic; Reverse-time migration; Model test

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References


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DOI: http://dx.doi.org/10.3968/j.aped.1925543820130601.1658

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