Graphical analysis of laminated sand-shale formations in the presence of anisotropic shales

Laminated sand-shale models with anisotropic shales have been discussed extensively. The interpretation methods are written in elaborate mathematical equations. However, there has not been a clear procedure to determine key parameters such as shale anisotropy, to guide the choice of solution, and, more importantly, to recognize the circumstances in which a solution is robust or sensitive to errors. Graphical crossplot gives better insights into petrophysics than a set of equations, while interactivity allows instant visualization of the solutions, thereby helping the petrophysicist in the most effective way.