Elastic Inversion

OpenGeoSolutions has developed a new class of inversion technologies (using a transformation of the Zoeppritz Equations) enabling direct computation of band limited elastic parameters that match corresponding filtered well log traces. These band limited solutions are derived solely from the information carried by the seismic data and show trace to trace relative variation of the elastic parameter that is being calculated.

Data requirements are at least 3 arbitrary angle/offset stacks and a well with dipole sonic and density over the inversion interval. Generated volumes include Density, Vp, Vs, Vp/Vs, AI, SI, GI, Kappa (Bulk Modulus), MU (Shear Modulus), Youngs Modulus, SIGMA (Poissons Ratio), LAMBDA (Lames Constant), LAMBDA MU, LAMBDA RHO, and MU RHO. Gamma-ray volumes are also possible dependent on the geological context.

The elastic volumes can serve as input to OpenGeoSolutions spectral analysis, Spectral Discontinuity(tm) and Spectral Inversion which may reveal subtle features not obvious on reflectivity data. Further estimation of the absolute values of the generated elastic parameters can be obtained with the incorporation of appropriate low frequency models.