Staggered-Grid Finite-Difference Wavefield Simulation and AVO Attribute Analysis for Two-Phase Media

The Staggered-Grid Finite-Difference Wavefield Simulation and AVO Attribute Analysis program for two-phase media is a sophisticated software package containing multiple staggered-grid implementations. The codebase allows users to select numerical schemes with different precision levels (e.g., 2nd-order or 4th-order spatial differentiation) based on specific requirements. The implementation includes eigenvalue analysis method for boundary absorption conditions, which effectively minimizes artificial reflections through impedance matching techniques. The software incorporates specialized modules for calculating elastic parameters of two-phase media using Biot's theory, handling complex pore-fluid interactions through constitutive relationship computations. Additionally, the package features comprehensive AVO (Amplitude Versus Offset) attribute analysis tools that implement Zoeppritz equation solutions and approximation methods for reflectivity coefficient calculations. Through this software, users can accurately simulate wave propagation in porous saturated media and analyze AVO responses, enabling better characterization of subsurface properties. The application demonstrates broad utility across petroleum exploration, seismology, and geological studies, particularly in reservoir characterization and fluid identification scenarios.