Experiment in relative permeabilities and two-phase transient theory
A series of pressure transients were observed at BR21, a high-enthalpy well. The variation in transient behavior with enthalpy gives some indication of the form of relative permeability functions for fractured media. The consistent form of the observed transients indicates that two-phase transient observations can be used to determine reservoir parameters.
The compressibility and hydraulic diffusivity of a water‐steam flow
Physical parameters are defined for a flow of water and steam in a porous medium: dynamic and kinematic viscosity, density, and compressibility. These permit single-phase pressure transient theory to be applied to two-phase flow provided that the pressure changes are not too large.
Routine quantitative phase analysis of niobium-bearing lateritic ores
Routine quantitative analyses by Rietveld full-pattern fitting have been carried out on more than one thousand niobium ore samples originating from four pyrochlore deposits: Lueshe and Bingo (D.R. Congo), Mabounie (Gabon), and Sokli (Finland). The ore samples were characterized by a highly variable mineral content, the presence of mineral phases with a wide range of compositions and a high amorphous content. An analytical procedure was established which addressed several problems: creation of an appropriate crystallographic parameter database, specimen preparation, check for preferred orientation and measurement of the amorphous content by the internal standard method.