Simulated Annealing Inversion: Job Parameterisation
Once the wavelet and seismic scalar are estimated, the next step is to parameterise the inversion job. Parameters to be tuned include starting models, impedance perturbation windows, seismic scalar, seismic and macro-model weights, SA initial temperature, convergence tolerance etc.
Optimal job parameters are determined in such a way that the inverted impedance near the well shows a best match with impedance log and that the misfit between the synthetic trace and seismic trace is at its minimum.
Left: Impedance parameter constraints. Right: Calculated seismic misfits.
Absolute impedance along an inline across the well.
Objective function values decrease with the annealing temperature.
Relative impedance along an inline across the well.