Mud-rock line estimation via robust locally weighted scattering smoothing method

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

The robust locally weighted scattering smoothing (LWESS) is another regression method that not only smoothes the scatter plot but also guard against outliers that distort the smoothed points. The mud-rock line produced by the robust locally weighted smoothing scattering method, LOWESS, has shown superiority over the Castagna linear regression method in mapping the Glauconitic sand reservoir of Blackfoot area. The produced graph has demonstrated to be a good visualizing tool for an effective direct hydrocarbon indicator (DHI) as well as in discriminating sand and carbonate lines.