Home – Home – Jornals – Russian Geology and Geophysics 2002 number 4

It is suggested to determine three independent elastic parameters of the medium (VP, VS, and ) by combined inversion of AVO data on compressional, converted, and shear waves recorded by three-component land seismic profiling. A linear solution to the problem is considered on the assumption of nearly constant elastic properties on a rigid plane boundary between two isotropic elastic half-spaces. The solution is obtained through an iterative algorithm that yields stable estimates of the model parameters. The stability and exactness of the solution has been tested by fitting and comparison of various wave combinations: (PP + PS), (PP + SH), and (PP + SV). The combination of (PP + SV) waves provides the optimum inversion on P (and S) waves, in the presence of up to 50% (100%) noise. The parameters determined from (PP + PS) and (PP + SH) waves are less accurate, as stable estimates can be obtained at lower noise (25 or 40% of the signal) on P, S, and converted waves.