Abstract
The key technology of vector-wave imaging in anisotropic medium is to separate quasi P (qP) and S wavefield. So far, it is very difficult to quickly and accurately obtain real P and S wave by wave-field separation. In this paper, based on theory of dynamic elasticity, the concept of pressure field which build relationship between seismic P-wave and main stress field is introduced. It is known that, in homogeneous elastic isotropic media, P-wave decomposed by Helmholtz formula is a real strain field, and has the same kinematics and dynamics characteristics with pressure field. However, qP-wave is not equal to a pure pressure field in vertical transverse isotropic (VTI) media. A new method of qP-wave separation by composing main stress is proposed in this paper. Numerical examples demonstrated that the new method can be used in qP-wave mode separation in VTI media, and provide a new path for elastic anisotropic vector-wave fast imaging.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.