G. Z. Ugwu* and C. C. Ezeh
Estimate of seismic velocity from seismic reflection data in prestack depth migration can be formulated as a general inverse problem. The current state of the art solution to this nonlinear problem is reflection tomography. The technique consists of minimizing the nonlinear least–squares function measuring the mismatch between the traveltimes picked from the seismic data and those calculated by ray tracing through the model. This technique was applied to 3D seismic reflection data acquired from Olua area of the Niger Delta, Nigeria. An improved image of the fault plane in the subsurface was obtained.
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