【摘要】 基于纵波、横波解耦的弹性波高阶有限差分方程和PML吸收边界条件,实现了RVSP观测统中弹性波数值模拟。采用完全弹性波波动方程进行数值模拟,可以得到纵波和横波的混合波场,且波场丰富,符合实际地震波的传播规律。该正演模拟方法纵波、横波自然解耦,产生全波场、纯纵波和纯横波模拟记录。通过对层状介质模型、凹陷模型,以及实际复杂介质模型的RVSP弹性波进行数值模拟,得到各模型不同分量下全波、纯纵波和纯横波的波场,并对弹性波传播特征进行了分析,为下一步的RVSP地震资料处理和解释工作奠定了理论基础。更多还原

【Abstract】 Based on P and S wave decoupling elastic wave high-order finite difference equation and PML absorbing boundary condition, we realized the elastic wave numerical modeling in RVSP recording geometry. With full elastic wave equation, we could obtain the mixed wave field of P and S wave, and for this method, the P and S wave are decoupled inartificially and we can get the record of full wave field, pure P wave field and pure S wave field simultaneously. With the modeling for several typical medium including layered, depression and practical complex mod- el, we obtained and studied at their wave field in different component, which played an important funda- mental role in RVSP seismic data processing and interpretation.更多还原