Abstract：3-D anisotropic forward modeling is important method for studying rule of wave-field spreading in anisotropic media.The paper presented a rapid and precise finite-difference forward modeling method for 3-D orthorhombic anisotropic media.The method adopted the finite-different form with four-order precision in space and two-order precision in time which both improves the precision of solution and is no much increase in computational effort;meanwhile,combining with flux-corrected transport method to overcome numerical dispersion and conducting calculation by using large grid step (coarse grid),the method can not only reduce computational effort but also improve precision.The paper presented a simple and practical 3-D anisotropic absorbing boundary condition for boundary reflection in order to pro-gray-easily and have a good absorption effect.The paper also has a general discussior_ on stability in numerical calculation. The numerical examples proved the correctness and the effectiveness of the method and showed that it has advantages of high precision and good boundary absorption.The method can be used not only to make synthetic common-shot records and three component VSP records in 3-D anisotropic media,but also to make synthetic zero-offset seismogram;meanwhile,the method can also be used for forward problems of wave-field in other different types.
张文生, 宋海斌. 三维正交各向异性介质三分量高精度有限差分正演模拟[J]. 石油地球物理勘探, 2001, 36(4): 422-432.
Zhang Wensheng, Song Haibin. Finite-difference forward modeling of three component records with high precision in 3-D orthorhombic anisotropic media. OGP, 2001, 36(4): 422-432.
