CEE Seminar: Linking Fluid-Flow, Microearthquakes, and Fracture Seismic Imaging in the Brittle Crust

Aug 17

Wednesday, August 17, 2022

Pratt School of Engineering


Peter Malin, Duke University, Adjunct Professor

The movement of unbound fluids in the brittle crust has long been a prime example of a problem in complex-and-non-linear systems: difficult to observe and account for at depths beyond several hundred meters. Beyond that point it is a fusion of multiphase chemistry and continuum-and-discontinuum mechanics, a mix of pressures, temperatures, and deviatoric stresses. Historically viewed either as a coupled thermo-hydro-mechanical system or a structureless random process. The aim of this presentation is to bring something of a work-around past such deterministic and statistical endmembers. Instead, a third, more stochastic perspective - based on borehole logs, samples, and seismic images - is proposed. The concepts that guide this alternative approach come from studies of systems near transitions in their properties - in this case the way fluids end up flowing through effectively solid rock. The outcome provides some unexpected insights and practical applications - e.g., a potential accounting for microearthquake statistics and more realistic forecasts of hydraulic stimulation effects. https://duke.zoom.us/j/97283216160?pwd=TksvRlJoSStSSDhrNElvZzRFcFI2dz09
Meeting ID: 972 8321 6160
Passcode: 274932


Carpenter, Ruby Nell