ERE Special Seminar Series - Paul Sava
Paul Sava | Colorado School of Mines - Colorado
"Seismoelectric imaging with virtual electrodes"
Seismic waves propagating in porous rocks generate electromagnetic signals depending on fluid saturation and observable remotely. This seismoelectric effect can characterize fluid saturation and rock permeability, but the observed signals are weak and conversions are distributed in the medium. We can solve the localization problem using multiple seismic sources synchronized in space and time in order to focus energy at specific targets. Focusing reduces the ambiguity of the seismoelectric conversion origin, and also insures strong conversions since all injected energy concentrates at a point. Such localized electric sources act as virtual electrodes with arbitrary, but known, position and trigger time.