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DTSTAMP:20220812T074334Z
LOCATION:Singapore Room
DTSTART;TZID=Europe/Stockholm:20220627T163000
DTEND;TZID=Europe/Stockholm:20220627T170000
UID:submissions.pasc-conference.org_PASC22_sess147_msa133@linklings.com
SUMMARY:Seismoelectric Effects for Subsurface Characterization
DESCRIPTION:Minisymposium\n\nSeismoelectric Effects for Subsurface Charact
 erization\n\nMorency, Matzel\n\nClassical approaches for Earth subsurface 
 imaging rely predominantly on seismic techniques, which alone do not direc
 tly capture fluid-specific properties. On the other hand, electromagnetic 
 (EM) measurements add constraints on the fluid phase through, for example,
  electrical conductivity. However, EM signals alone do not offer direct in
 formation of solid properties. In the recent years, there have been effort
 s to combine seismic and EM data for exploration geophysics. The most popu
 lar approach relies on joint inversion of decoupled seismic and EM data. B
 y analyzing fully coupled poroelastic seismic and EM wave equations, one c
 an capture a pore scale behavior known as seismoeletric effects and more a
 ccurately resolve both solid and fluid properties. We will present the equ
 ations used to model the seismoelectric response, namely electrokineticall
 y coupled Biot's poroelastic seismic and Maxwell's electromagnetic wave eq
 uations. To solve these equations, we use a spectral-element method (SEM).
  The SEM, in contrast to finite-element methods (FEM) uses high degree Lag
 range polynomials. Not only does this allow the technique to handle comple
 x geometries similarly to FEM, but it also retains exponential convergence
  and accuracy due to the use of high degree polynomials. Finally, we will 
 discuss applications such as carbon storage sequestration and geothermal r
 esources monitoring.\n\nDomain: Climate, Weather and Earth Sciences, Compu
 ter Science and Applied Mathematics, Physics
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