Xu-Payne for carbonates rock physics modelling



If we can seperate the different pore types in using different impedances we can then classify inversion results using a Bayesian Classification, this will give us a distribution of the different pore types within the 3D cube.

In the Acoustic Impedance vs. Gradient impedance cross-plot the different pore types appear to have different acoustic properties. This means that, based on the results of AVO inversion to Acoustic and Gradient impedance, we can map out in 3D the dominant pore type away from the wells via a Bayesian Classification.  The cross section below shows the 2D results through a 3D cube of different pore types mapped out through the reservoir. Ellipsoids and Cracks are known for being connected and moveable whereas Spheres and ellipsoids are known to be unconnected and trapped.