Well Seismic Inversion for Prediction under the Bit

B-32 WELL SEISMIC INVERSION FOR PREDICTION UNDER THE BIT JORGE E. ACOSTA A. PDVSA E&P P.O. Box 829 Caracas Venezuela 1 SUMMARY The Corridor Stack and Velocity Profile derived from a Vertical Seismic Profile (VSP) acquired at some intermediate stage of the perforation of a well can be processed and analyzed to obtain a better understanding of the geological model. Inversion of VSP results for a borehole drilled on overthrust structures in the mountain belt of Perija Western Venezuela were analyzed for porosity and hardness values of the rocks to be drilled. The main objective of the well was a