Lawrence Berkeley National Laboratory
Shear-slip analysis in multiphase fluid-flow reservoir engineering ap plications using
- Author(s): Rutqvist, Jonny
- Birkholzer, Jens
- Cappa, Frederic
- Oldenburg, Curt
- Tsang, Chin-Fu
- et al.
This paper describes and demonstrates the use of the coupled TOUGH-FLAC simulator for geomechanical shear-slip (failure) analysis in multiphase fluid-flow reservoir-engineering applications. Two approaches for analyzing shear-slip are described, one using continuum stress-strain analysis and another using discrete fault analysis. The use of shear-slip analysis in TOUGH-FLAC is demonstrated on application examples related to CO2 sequestration and geothermal energy extraction. In the case of CO2 sequestration, the shear-slip analysis is used to evaluate maximum sustainable CO2-injection pressure under increasing reservoir pressure, whereas in the case of geothermal energy extraction, the shear-slip analysis is used to study induced seismicity during steam production under decreasing reservoir pressure and temperature.