The tight gas sands of the Rocky Mountain Region contain large volumes of gas; yet, to date there is very little production from this region. One of the reasons for the lack of exploration of this valuable reserve may be the inability to accurately evaluate the reserve. The most practical way to evaluate this resource is with wire-line logs. Therefore, research is being conducted in order to determine the best methods of evaluating this reserve. Specifically, the research is being directed toward evaluating the ability of the neutron, the density and the sonic log to predict the porosity of the subsurface formations.