Abnormally High Fluid Pressures and Associated Porosities and Stress Regimes in Sedimentary Basins

Summary The relationships between overpressures and porosity and overpressures and stress regime are found to differ significantly according to the geological setting and overpressure generating mechanism. These factors must be taken into account in pore pressure prediction techniques and in correlations between pore pressure and minimum horizontal stress. Two examples from overpressured Canadian basins are presented to illustrate the above.