摘要
大量数据表明地下岩层的地震各向异性是普遍存在的。然而在常规处理中,通常视地下介质为各向同性介质,这必然导致一定的误差。作者从弹性波动方程出发,用虚谱法正演模拟了横向各向同性介质中弹性波场,用弹性波多分量联合逆时深度偏移法,并在计算中很好地解决了边界反射问题,实现了多波多分量资料的偏移,获得了一些与各向异性介质有关的波场信息和认识。这些信息和认识有助于复杂地层成像和岩性参数反演。
A large amount of data show that seismic anisotropy widely exists in underground terranes. But in traditional processing, people usually consider subsurface as isotropic media. So some errors may be resulted in. Based on the equation of elastic wave, this paper presents the forward modeling for seismic wave field of transversely isotropic media via pseudo-spectral method. And the paper uses the reverse-time depth migration method to realize migration of multiwave and multicomponent informations. The absorbing boundary problem is solved by taking the method of the attenuate absorbing boundary condition. Some information and knowledge about wave field in anisotropic media have been obtained. These information and knowledge are helpful for complex stratum image and lithologic parameter inversion.
出处
《成都理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2006年第3期310-316,共7页
Journal of Chengdu University of Technology: Science & Technology Edition
基金
国家863计划项目(2001AA602018-04)
关键词
各向异性
正演模拟
逆时深度偏移
弹性波
anisotropy
forward modeling
reverse-time depth migration
elastic wave
