Electricity: measuring and testing – Particle precession resonance – Using well logging device
Reexamination Certificate
2007-11-27
2007-11-27
Arana, Louis M. (Department: 2859)
Electricity: measuring and testing
Particle precession resonance
Using well logging device
C324S308000
Reexamination Certificate
active
11616220
ABSTRACT:
A method for estimating a concentration of a substance in a test sample of formation fluid, comprising measuring an NMR parameter of a first sample of formation fluid to obtain a first measurement, adding a known quantity of the substance to the first sample to produce a modified sample, measuring the NMR parameter of the modified sample to obtain a second measurement; and determining a relation between the concentration of the substance and a function of the NMR parameter using the first and second measurements and the NMR parameter of the substance.
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Cheng Yuesheng
Freedman Robert
Ganesan Krishnamurthy
Kharrat Abdel M.
Arana Louis M.
Gaudier Dale V.
McEnaney Kevin P.
Schlumberger Technology Corporation
White Bryan L.
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