Process for determinau00c7u00e7o porosity of configurations of the earth penetrated by a drill hole, process for determinau00c7u00e7o porosity of configurations of the earth penetrated by a drill hole during the ferfurau00c7u00e7o of boring hole, a system for determinau00c7u00e7o porosity of F. Ormau00c7u00d5es ground penetrated by a drill hole.And the system to determine the porosity of the configurations of the earth penetrated by a drill hole during the perfurau00c7u00e7o of boring hole.

摘要

This invention is directed toward the determination of porosities of earth formations penetrated by a borehole, and more specifically is directed toward the determination of porosities of earth formations while the borehole is being drilled. Borehole invariant neutron porosity measurements are obtained using a borehole tool which provides the response of two detectors spaced axially at different spacings from a neutron source. No independent measure of borehole geometry is required to correct the resulting porosity measurements for variations in borehole size or variations of the position of the borehole tool within the borehole. IMAGE