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Published byAmie Scott Modified over 8 years ago
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CREWES 2003 Sponsors Meeting We’ve presented our research results and educational progress in geophysical exploration in partnership with the resource industry. We’ve enjoyed visiting with you! Thank you for your interest, comments, and support.
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Continuing CREWES Focus in 2003-2004 SEISMIC LITHOLOGY & FLUID IMAGING INTERPRET. & CASES BOREHOLE & HIGH-RES. NUMERICAL MODELING SIGNAL PROCESSING PHYSICAL MODELING FIELD OPS. & INSTRUMENTS
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Future Research: Risk and Reward
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where: u is local displacement; 0 is the density; , are amplitudes in nonlinear terms. Non-linear wave equation: Non-welded contacts, etc.
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Overtones generated by non-linear propagation (Physics Today, 2001)
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Attenuation-relaxation imaging Fluid-saturated rock
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Seismoelectric phenomena (Gharibi, Bentley, & Stewart) Elastic waves can induce electromagnetic fields through various coupling mechanisms. P-wave rock matrix S-wave rock matrix
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Using a quasi-static approximation, ( )>> ( ), ( : electrical conductivity, : dielectric permittivity, : angular frequency) and plane-wave solution for an isotropic and homogenous whole-space; Linear relationship between EM and elastic waveforms,for P-waves,for SH-waves,for P-waves,for SV-waves E: electric field H: magnetic field U: grain displacement
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L( , , , ,…) is a function of fluid’s electric conductivity ( ), fluid’s dielectric constant ( ), shear viscosity ( ), and bulk density ( ). T( , , , ,G,…) is a function of porosity ( ), fluid’s dielectric constant ( ), shear viscosity ( ), bulk density ( ), and shear modulus (G).
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Estimation of physical properties Compute L using; or Compute T using; or Invert L and T to estimate; f (L,T ) , , , , , G inversion
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Layout of grounded dipole antennas, magnetic sensors, and geophones about the shotpoints in simultaneous recording of seismic and seismoelectromagnetic surveys. Single shot and receiver illustration of simultaneous seismic and seismoelectromagnetic survey. Seismoelectromagnetic survey
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