Evaluation of Rock Properties from Logs Affected by Deep Invasion – A Case Study

Seismic reservoir characterization is a well-known technique to obtain a better understanding of hydrocarbon-bearing reservoirs by careful analysis and integration of petrophysical and seismic data. The petrophysical properties are normally obtained through the evaluation of well logs and core data. A rock physics model provides the link between these reservoir properties and the surface seismic data. Well log measurements are often subjected to various sources of errors, like borehole rugosity due to washouts and mud filtrate invasion. This invasion effect can be significant for permeable rocks and is the focus of this study.