Permeability is arguably the most important property in evaluating fluid flow in the reservoir. It is also one of the most difficult parameters to measure in field. One of the main techniques for determining permeability is the application of Nuclear Magnetic Resonance (NMR) logging across the borehole. However, available correlations in literature for estimating permeability from NMR data do n...

ABSTRACT Uranus and Neptune are still poorly understood. Their gravitational fields, rotation periods, atmosphere dynamics, internal structures not well determined. In this paper, we present empirical structure models of where the density profiles represented by polytropes. By using these that set to fit planetary gravity field, predict higher order coefficients J6 J8 for various assumed wind d...