Abstract:Thin interbeds may have equivalent azirnuthal isotropy when the thickness of each isotropic thin interbed is much smaller than wave length. We advance the propagation matrix method that is suitable to azirnuthal isotropic medium. The theoretical reflected seismograms and transmitted seisrnigrarns are synthesized respectively by using propagation matrix method in isotropic medium and that in equivalent azirnuthal isotropic medium. The comparison between the corresponding synthetic seismograms leads to the conclusion: when incident rays are vertical or nearly vertical, propagation matrix method in isotropic medium is also suitable to thin interbed medium, and the equivalent azimuthal isotropy of thin interbed exists really, when incident rays are oblique, the synthetic seisrnigrams offered by two different methods differ from each other.
徐果明, 李跃, 倪四道, 王汉标. 薄互层等效横向各向同性的研究[J]. 石油地球物理勘探, 1996, 31(6): 792-805.
Xu Guoming, Li Yue, Ni Sidao, Wang Hanbiao. Research on equivalent azimuthal isotropy of thin interbed medium. OGP, 1996, 31(6): 792-805.