Stochastic seismic inversion
You may want to investigate the Delivery package available from 

http://www-old.dpr.csiro.au/StochasticSeismicInversion/

'Delivery is an open-source, trace-based Bayesian seismic inversion code for use in oil reservoir characterisation at the early development and appraisal stage. See the Computers and Geosciences paper for most of the details, and the Delivery4D preliminary writeup for the time-lapse modelling.'