A simple empirical friction correction allows for the interpretation of previously uninterpretable differential-pressure density logs. This second in a three-article series (Part 1, OGJ, Dec. 4, 2000, ...

An empirical method, designated as DMR (density-magnetic resonance) porosity, combines density and nuclear magnetic resonance porosities to improve the estimate of tight gas sand porosity. The DMR ...

This is a preview. Log in through your library . Abstract The log-density functional ANOVA model provides a powerful framework for the estimation and interpretation of high-dimensional densities.

The determination of density-dependence of a mortality process is attempted by taking the linear regression of the logarithm of population density (or k defined by Varley and Gradwell, 1960) against ...