Abstract
We present a 2D slope borehole tomography method handling walk-away transmitted data. The specific parameterization of stereotomographic model, including both velocity field and ray parameters, leads us to propose an original way to process direct arrivals at well : pairs of direct arrivals are created and processed as surface reflected data would be. Such an approach allows to keep a common inversion formalism and to perform final model QC. Moreover, specific information brought by direct arrivals, such as one way travel times, are introduced in the inversion process as a priori information. This approach was tested on synthetic picks and applied to a real data set.
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