Elastic wave prestack depth migration based on screen method

Elastic wave migration is one of the key technologies of multicomponent exploration. In this paper, the finite-difference compensation in Fourier finite-difference method of acoustic equation is applied to elastic screen propagator. Vector imaging condition is used through calculating polarized vector, and projecting component to polarized direction. It makes the information carried in wave field used efficiently and resolves the polarization issue of P-SV in imaging, which allows partial images from different sources and can be stacked to generate a final image. Finally, elastic screen propagator with wide angle correction and vector imaging condition are tested with model data, and the migration result is ideal.