Multicomponent prestack reverse-time migration of elastic waves in transverse isotropic medium

作者：Du Qi Zhen^*; Qin Tong

来源：Chinese Journal of Geophysics, 2009, 52(3): 801-807.

DOI：10.1002/cjg2.1367

• Imaging condition
• Poynting vector
• Multicomponent
• Reverse-time migration
• Staggered grid
• VTI medium
• Velocity-stress equation

With the development of exploration in the mature exploration areas, the subtle trap is playing a dominant role. So, joint migration of multicomponent in anisotropic media is the key technology. This paper provided a full 2-D elastic prestack reverse time depth migration algorithm for common-source multicomponent data from VTI media. Extrapolation used the coupled anisotropic velocity-stress equation for variable velocity solved with a high order staggered grid finite-difference scheme in space and a second-order finite-difference scheme in time. A, new imaging condition combined excitation-time imaging condition with Poynting vector was proposed to remove low-frequency artifacts. The algorithm was illustrated by application to synthetic data. The results show that this approach produces clear images and can remove low-frequency noises.

• 出版日期2009-3
• 单位中国石油大学（北京）