Use of Pulsed NMR to Estimate the Fuel Yield of Eastern Gas Shales

摘要

A pulsed NMR (nuclear magnetic resonance) technique was applied to the estimation of fuel yield of Devonian gas shale. NMR proton spins were correlated with oil yield, with hydrocarbon gas yield, and with percent organic carbon as determined by material balance assay. Correlation coefficients of approximately 0.85 were obtained. Improvement in correlation is limited by the imprecision of the material balance assay at the relatively low fuel levels encountered with the various shale samples. (ERA citation 05:030219)