Anisotropy Estimation from P-Wave VSP Data

H010 Anisotropy Estimation from P-Wave VSP Data V. Grechka (Shell International Exploration & Production Inc.) A. Mateeva* (Shell International Exploration & Production Inc.) G. Franco (Colorado School of Mines) C. Gentry (Shell International Exploration & Production Inc.) P. Jorgensen (Shell International Exploration & Production Inc.) & J.L. Lopez (Shell International Exploration & Production Inc.) SUMMARY P-waves recorded in VSP geometry allow estimation of local velocity and anisotropy without knowing or assuming anything about the overburden. We present two examples of our parameter-estimation methodology. Our most important practical conclusion is that the technique we developed works in a robust manner in