Inversion for elastic parameters using pre-stack seismic data and analysis on inversion strategy

The inverse problem is ill-posed essentially,so the inversion strategy is very important in order to obtain reasonable inversion result.In this paper,the modeling and inversion system of reflectivity and conjugate gradient method is taken.The influences are discussed which the best convergence step of data with different frequency range and the composition of objective function have imposed on the inversion.The strategies of layer-divided inversion,frequency-divided inversion and varied objective function are taken based on the discussion,and the test of inversion for elastic parameters is done using pre-stack seismic data and marine logging model.The point of view is proposed that it is necessary to control the quality of inversion intermediate results in order to obtain stable and reasonable inversion final solution,based on the analysis on the inversion result.