【摘要】 本文提出一种利用纵波激发、纵波和横波同时接收的两个或多个入射角平面波地震记录同时反演层状介质密度、纵波速度和横波速度的有限带宽反演方法。该方法基于弹性波方程，因此能处理各种转换波和多次波。对有限带宽记录及合有噪声的数据试算表明；这一基于层剥离和优化思想的准特征带方法运算速度快、稳定性较好，并具有一定的抗噪能力。更多还原

【Abstract】 We describe the bandwidth-limited inversion method for simultaneously deriv-ing the density,P and S wave velocities in layered medium from two or multiangu-lar-incident plane wave data which were generated in P-wave shot condition butrecorded in the way of n11xed P and S-waves. Various converted waves and multiplewaves can also be processed because the method is based on elastic wave equation.The trial processings of bandwidth-limited and noisy seismic data show that thequasi-characteristic zone method which is based on layer stripping and optimizationresults in fast operation,good stability and certain noise resistance.更多还原