2-D ACOUSTIC-WAVE EQUATION INVERSION COMBINING PLANE-WAVE SEISMOGRAMSWITH WELL LOGS

Seismic waves can be described approximately by an acoustic wave equat ion. An inversion procedure for obtaining velocities using well logs a nd plane-wave reflection seismograms is described. The forward problem is based on the 2-D acoustic wave equation. The inversion is performe d by minimizing the difference between the calculated data and the obs erved data using the least-squares regularization method. The numerica l example shows that the stability and the robustness of the algorithm to noisy data is improved by introducing well logs into the inversion process.