Formation density logging using two detectors and sources

Details Formation density logging using two detectors and sources Formation density logging using two detectors and sources

G - Physics

01

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358/3

G01V 5/12 (2006.01) E21B 49/00 (2006.01) G01N 9/24 (2006.01)

Patent

CA 1256595

ABSTRACT A gamma ray density sub-collar and method for measurement-while-drilling applications using a pair of gamma ray sources and detectors, located symmetrically about the axis of the sub, and computation of the product of the counting rates obtained from the two detectors to indicate the average density of a formation sample which surrounds a borehole traversing an earth's formation. The sub is able to measure the density of the sample independent of the location of the sub within the borehole, and the chemical composition of the interfering materials lying between the formation sample and the detectors. 13

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