Prestack Reverse Time Migration of Crosshole Seismic Elastic Wave Based on Decoupling of Longitudinal and Shear Wave
Through deriving the generalized first order stress-velocity unconverted wave equation,it is not necessary for the data to separate the longitudinal wave from the shear wave before prestack reverse time migration of the elastic wave and it can realize the imaging method of prestack reverse time migration of the independently imaged vectors of the longitudinal and shear wave by means of the characteristics of the elastic wave vectors in the process of extrapolation of the wave field.Through the theoretical model and the migration imaging of the actual data,it validates the feasibilities of this method and both its imaging precision and the computation speed are greatly improved.
crosshole seismic reverse time migration elastic wave decoupling
Dazhou Zhang Shilei Wei Xiaocong Lian
Ministry of Education, School of Geosciences and Info-Physics, Central South University, PRC 410083 Key Laboratory of Metallogenic Prediction of Nonferrous Metals, Changsha, PRC 410083
国际会议
长沙
英文
256-265
2012-06-15（万方平台首次上网日期，不代表论文的发表时间）