Rock Physics Modeling in Oil and Gas Field Development: A Methodology for Reservoir Characterization in Low Salinity Pay

In this paper, we described some of the key challenges faced and their solutions during the reservoir characterization study. Shear log prediction can be done quickly by methods, such as multi linear regression and also by building a robust petro-elastic model, if pore geometry and rock moduli are known. Both methods provide comparitive results and helps to rectify inaccurate data or fill missing gap. Rock physics modeling also helps to gain confidence on the quality of petrophysical curve by comparing the difference between original (measured) vs. predicted (modelled) curves. Reservoir and non reservoir rocks can be distinguished on elastic properties cross plots. Some thoughts are shared on the methods to calculate petrophysical input, such as shale volume, porosity, water saturation with field wide approach. Once consistent set of logs are available, further analyses, such as well to seismic tie, AVO and time-lapse study can be accomplished.