Electricity: measuring and testing – Particle precession resonance – Using well logging device
Patent
1997-09-16
2000-03-21
Oda, Christine K.
Electricity: measuring and testing
Particle precession resonance
Using well logging device
324307, G01V 300
Patent
active
060406968
ABSTRACT:
In this invention a new interpretation methodology has been developed. A pore structure model is used to compute the relaxation behavior. This model is then used as the kernel of a best-fit inversion scheme against the measured data, in contrast to inverting for a T.sub.2 distribution that relies on regularization. Parameters of the model are obtained by "best fitting" the model with the data. The method considers a geometrical or physical model comprising both intergranular and intragranular porosity (microporosity). The NMR relaxation is computed by one of the several methods. The model is compactly represented by a set of physical parameters that are iterated upon until a match with relaxation data is obtained in the best fit sense. The result is obtained in terms of these physical parameters, and then integrated with other types of measurements.
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Fordham Edmund J.
Kenyon William E.
Ramakrishnan Terizhandur S.
Schwartz Lawrence M.
Wilkinson David J.
Batzer William B.
Fetzner Tiffany A.
Levy Mark
Oda Christine K.
Schlumberger Technology Corporation
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