Simply stated, seismic inversion is the process of determining what physical characteristics of rocks and fluids could have produced the seismic record you are viewing. Another way to look at it: we are trying to determine the input by looking at the output. Transforming a noisy, processed seismic trace into a density log or a sonic log is the inverse of transforming these two logs into a synthetic seismogram, hence the name inversion. Inversion is the “flip side” of forward modeling. In many cases the physical parameters of interest are impedance, velocity and density although people have been know…
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