H013 Quasi Inversion of Walk-Away VSP Data on the Base of Gaussian Beams Decomposition I. Borodin (Schlumberger K.K.) D. Pissarenko (Schlumberger Moscow Resaerch) M. Protasov (Trofimuk Inst. of Petr. Geol. and Geoph.) & Vladimir A. Tcheverda* (Trofimuk Inst. of Petroleum Geology and Geophysics) SUMMARY We present an approach of true amplitude seismic imaging by means of weighted summation of walkaway VSP data. In order to compute these weights we trace a couple of Gaussian beams (GB) from the current point within target area towards acquisition system. Each GB possesses the minimal width at this starting point. That means that the


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