Publications

Carbonate reservoir characterization has many challenges and is continually evolving. A method currently developed and applied is sonic log analysis. Traditionally, the compression and shear borehole sonic data are used for both geomechanical and seismic calibration. However, the propagation of compressional and shear waves at difference velocities through anisotropic shale can have a pronounced impact on sonic log readings and their interpretation. Here, we assume that the shale is a Vertical Transverse Isotropic (VTI) media. We characterized these anisotropy parameters for a Carbonate reservoir by integrated anisotropy and isotropy modeling from single well analysis and geophysics workflows that combined measurement from analyses of core, sonic log data and other petrophysical properties. On a single well analysis, the Thomsen parameters were obtained to characterize anisotropy. We compared this analysis with an isotropic sonic log analysis. The results show that the anisotropy has significant implications for amplitude and shear wave velocity distribution. Keywords: Sonic Log, Anisotropy, Carbonate Reservoir