A. Selnes, A. Edwards, D. Cameron, R. Wright, I. Atkinson, J. Carter, W. Busuttil, S. Green and S. O'Connor
Over the last three decades rock physics has evolved to become a key tool of reservoir geophysics and an integral part of doing quantitative seismic interpretation. This requires prior knowledge and understanding of geophysics, petrophysics, geopressure and geomechanics, which can vary dramatically in basins around the world. These inherit differences create highly variable rocks that can be so complicated and variable, not only on a basin by basin scale, but also on an intra-basinal scale. With these differences a universal rock physics model, both theory and empirical relationships, is difficult to envisage. However, if a simplistic view is taken then all rock physics models can be simplified to their reliance on an accurate understanding of three important parameters: temperature, pressure and gravity. To constrain these uncertainties we present in this paper a method of accurately building a rock physics model by integrating temperature and pore pressure data. Further, we demonstrate, by use of analogues, how universal these rock property models are at predicting the elastic properties of a rock with application to un-drilled areas such as, offshore Newfoundland and Labrador.
This paper was presented at the EAGE 2015 by Dr Alex Edwards from Ikon Science.