This compilation focuses on the practical aspects of the use of wireline logging in today's domestic petroleum industry. It explores the implementation methodologies and the technical and economic successes and failures encountered in use of advanced logging technologies and the use of innovative methods to extract reservoir petrophysical information from existing wireline logs. The majority of the logging applications reviewed are those performed in projects jointly funded by the domestic petroleum industry and the U. S. Department of Energy (DOE) in DOE'S Field Demonstration Program, particularly under the Reservoir Class Program. Because less than one-half of the nearly 30 projects in the Reservoir Class Program have been completed, much of this work was reviewed in progress.