Thermal neutron counts and derivated charts

Abstract

The neutron diffusion equation was solved under a “single cylinder one group (thermal neutrons)” approximation. The resulting equation was applied with a mixing index, , for various formation matrices and porosities. The ratio of counts from two different detectors was plotted as a function of porosity for these formations. These plots are useful for wireline log interpretations.

Journal of the Nigerian Association of Mathematical Physics Vol. 10 2006: pp. 489-492