Simulated Annealing Inversion | Job Parameterisation
InSeis

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.

SA Inversion: Job Parameterisation diagram

Left: Impedance parameter constraints. Right: Calculated seismic misfits.

SA Inversion: Job Parameterisation diagram

Absolute impedance along an inline across the well.

SA Inversion: Job Parameterisation diagram

Objective function values decrease with the annealing temperature.

SA Inversion: Job Parameterisation diagram

Relative impedance along an inline across the well.