oa Understanding the Pore Pressure, Burial History and Rock Properties Using 3D Basin Modeling

Three dimensional modeling of the petroleum system offers the possibility of evaluating the pore<br>pressure and filling history of tight gas reservoirs by integrating different processes involved in the<br>evolution of sedimentary basins and corresponding pore fluids. This approach also provides the<br>possibility of evaluating the rock properties combined with the depositional history of the basin, which<br>ensures a more geologically coherent process.<br>Conventional pore pressure prediction workflows such as seismic velocity analysis, petrophysical<br>methods and real time monitoring of drilling operations have their limitations in this data constrained<br>setting and play. In many of these areas with deep and tight reservoirs, poor seismic and quality<br>calibration data, complicate the pore pressure prediction. The data from these methods is further<br>limited by their static nature, whereas basin modeling provides a dynamic approach.<br>In this study, 3D basin modeling results were presented from the South Ghawar area of the Arabian<br>Basin where pore pressure evolution combined with the filling history and rock properties of reservoirs<br>was investigated. In addition, the effective stress and porosity trends were modeled through time to<br>understand the controls on reservoir deliverability.