Electricity: measuring and testing – Particle precession resonance – Using well logging device
Patent
1997-03-13
1999-12-21
Arana, Louis
Electricity: measuring and testing
Particle precession resonance
Using well logging device
324300, G01V 300
Patent
active
060053895
ABSTRACT:
An NMR pulse sequence and signal processing method is disclosed for measurement of fast decay response signals from materials containing a fluid state. The proposed pulse sequence and processing method are applicable in borehole NMR logging as well as measurements of attributes of man-made or natural materials. The disclosed pulse sequence comprises a series of short NMR pulse trains separated by intervals which are shorter than the time required for polarization of nuclear magnetization in bulk fluids of the fluid state. By stacking response signals to increase the signal to noise ratio, time domain data is obtained that generally corresponds to transverse decay components as short as about 0.5 ms. Various attributes of the materials being investigated can be derived in a single measurement.
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Arana Louis
Numar Corporation
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