ANALYSIS OF NMR-DATA OF MULTIPLE MEASUREMENTS ON BASIS OF MAXIMUM ENTHROPY Russian patent published in 2008 - IPC G01N24/00 G01R33/44 

Abstract RU 2334975 C2

FIELD: physics.

SUBSTANCE: application: for survey of wells with the help of nuclear magnetic resonance. It consists in the fact that multiple measurements are carried out by method of nuclear-magnetic resonance (NMR) of nuclear spins system, NMR-data is registered, received in every of multiple NMR measurements, multidimensional multiplicity of data is calculated by execution of reverse transformation process on NMR-data, which does not depend on preliminary knowledge about the area, including determination of fluid response from three-dimensional measurement according to equation where: τ1, τ2, τ3 - three parameters of data registration, which characterise specific measurement; f(i,j,k) - amplitude of component i, j, k in three-dimensional distribution (i.e. every distribution corresponds to specific property), H(τ1, τ2, τ3; i, j, k) - response of this component to measurement, which is preset by parameters τ1, τ2, τ3; δ - accidental noise, at that response H(τ1, τ2, τ3; i, j, k) is determined at every value of i, j, k for every echo-signal (or, in case of compression with application of windows, for every sum of window echo-signals).

EFFECT: increase of validity of values that characterise composition of fluid.

22 cl, 3 tbl, 7 dwg

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RU 2 334 975 C2

Authors

Khiton Nikolas Dzh.

Dates

2008-09-27Published

2004-01-13Filed