Estimation of the potential supply of U.S. oil by life cycle and learning models

Two methods of estimating potential U.S. oil supply are reported: life cycle analysis of updated (1987) oil production data, and an analysis based on learning curve modeling of discovery rates. Based on these analyses, potential U.S. (lower 48 plus Alaska) oil supply (ultimate recoverable oil) is estimated to be 222 billion barrels. A rough inference of the economic reference for this potential oil supply is an oil price of about $20/bbl (1989 dollars).     

Comment on 'Numerical calculation of modes of oscillation of the Earth's core' by D. E. Smylie, X. Jiang, B. J. Brennan and K. Sato

In a recent paper, Smylie et al . (1992) have referred to the issue of transport terms in the boundary conditions when applying the subseismic equation (SSA) in core dynamics. Here we wish to set the record straight concerning the erroneous interpretation of, and confusing references to, our own work on the subject.