Iteratively re-weighted least squares inversion for the estimation of density from well logs: part one

Abdul-Nassir Saeed, Laurence R. Lines, Gary F. Margrave

A quantitative analysis of density log is established in this study by inverting of density log. The re-weighted inverse algorithm of density log using different constraints in model-structure space have shown stable and fast convergence towards the final model with few numbers of iterations. The inverted density model has resolved different lithology layers, and successfully delineated gas-bearing sand reservoir of the Blackfoot.