It is well known that industrial scale injection of fluids into the subsurface can induce seismic events. In order to understand how the reservoir properties are evolving and to mitigate the risks of inducing a large seismic event it is of crucial importance to understand the links between seismicity and fluids. We investigated this relation at the reservoir and decameter scales by comparing geomechanical simulations results with geophysical measurements. First, we will present a study on the Northwest Geysers EGS Demonstration project to illustrate how a deep understanding of the mechanisms of induced seismicity can help to characterize the EGS creation and development. Then, we will present an in-situ experiment in claystone formation, which aim to reactivate a small fault zone by controlled fluid-injection. We will show how the hydraulic properties along the fault evolve during and after the rupture and how these changes and their causes control the fault stability.
About the Speaker: Pierre Jeanne (Project Scientist, Energy Geosciences Division, Lawrence Berkeley National Laboratory)
Pierre Jeanne is a project scientist in the Energy Geosciences Division at Lawrence Berkeley National Laboratory (LBNL). He received his PhD in 2012 from University of Nice-Sophia-Antipolis (France). His research is focus on analysis and modeling of thermo-hydro-mechanical coupled processes in geological media. He has a particular interest on understanding the relation between fluid flow, fault properties and induced seismicity.
Hosted By: Yves Guglielmi