Changes

==Basis==

==Basis==

Sneider and others at Shell Oil Company developed a methodology for estimating permeability from cuttings by calibrating permeability measured from cores with rock-pore parameters described in cuttings. Cores of known permeability were ground up until chips from the core were the size of cuttings. By using comparators made from core chips, they estimated formation permeability from cuttings with surprising accuracy. Although Sneider and King<ref name=ch09r57 />) describe the method for estimating sandstone permeability from cuttings (presented below), procedures could just as easily be developed to predict permeability of carbonates from cuttings.

Sneider and others at Shell Oil Company developed a methodology for estimating permeability from cuttings by calibrating permeability measured from cores with rock-pore parameters described in cuttings. Cores of known permeability were ground up until chips from the core were the size of cuttings. By using comparators made from core chips, they estimated formation permeability from cuttings with surprising accuracy. Although Sneider and King<ref name=ch09r57 /> describe the method for estimating sandstone permeability from cuttings (presented below), procedures could just as easily be developed to predict permeability of carbonates from cuttings.

==Petrophysical description==

==Petrophysical description==