3-D wave equation prestack numerical simulation using the absorbing boundary condition that needs weighting-directional correction and interpolation prediction
Luo Daqing1, Song Wei1, Wu Lu1, Bai Senlin2
CT Laboratory, Department of Earth Science, Petroleum University, Reservoir Street, Changping county, Beijing city, 102200
Abstract:The Clayton absorbing boundary condition that underwent 3-D weighting-directional correction is advanced after analysing the disadvantage of original Clayton absorbing boundary condition;and interpolated wave-field prediction method is used to attenuate some corner reflections of 3-D model. Numerical computation shows that new absorbing boundary condition gives better boundary reflection attenuation;and particularly, interpolated wave-field prediction method attenuates edge and corner reflections much better than Clayton absorbing boundary condition. This technique has been taken to achieve 3-D wave equation prestack numerical simulation of a typical 3-D geology model, with satisfactory result.