A major effort of the group is focused on the study of the effects of patchy saturation on seismic signatures. This effort is partially funded by the ARC Discovery Project Seismic response of partially saturated petroleum reservoir zones: towards quantitative recovery monitoring. The main objective is to quantify the effect of random spatial distribution of fluid patches. The approach is based on the general theory of heterogeneous poroelasticity developed by CRGC in 2003-2005.
The aim of the current effort is to build a general model for elastic properties of partially saturated rock with a given statistical distribution of fractures and with arbitrary contrast between the properties of the two fluids (e g, gas and liquid). Future work will also involve analysis of the effect of self-similar distribution of fluid patches. We are also performing a series of fluid injection experiments with X-ray and ultrasonic control to validate our theoretical findings.