Use of groundwater-flow models for prediction of future availability of water resources is standard practice. Having accurate hydraulic parameters for input into groundwater-flow models is critical to the generation of realistic local and regional water-resource management plans. Transmissivity, hydraulic conductivity, and storativity are some of the important parameters needed for developing numerical groundwater-flow models.

This color poster depicts the rock-fabric method for linking geologic descriptions with petrophysical properties. The rock-fabric method can be used to (1) estimate matrix permeability and initial water saturation using rock-fabric descriptions porosity and reservoir height and (2) distribute petrophysical properties within a sequence stratigraphic framework.

From 1952 to 1956, Pemex conducted a considerable amount of stratigraphic field work in the eastern Sierra Madre and in Laramide folds to the north across the Sabinas Basin. Special thanks and consideration are extended to Pemex for releasing this classic work, in which 76 stratigraphic sections were measured and described, resulting in this significant internal company report by William E. Humphrey and Teodoro Diaz. The former was initially employed by the consulting firm of DeGolyer and MacNaughton; the latter was employed by Pemex.