Electricity: measuring and testing – Particle precession resonance – Using well logging device
Patent
1998-08-17
2000-08-22
Arana, Louis
Electricity: measuring and testing
Particle precession resonance
Using well logging device
G01V 300
Patent
active
061077968
ABSTRACT:
A method and apparatus for processing nuclear magnetic resonance (NMR) information to differentiate between oil based mud filtrate (OBM), and connate oils, during subsurface exploration. An NMR experiment is performed on a sample of formation fluid, and the resulting data is then processed to differentiate between the relaxation time parameters characteristic of OBMs and those characteristic of connate oils. A simple arithmetic difference between relaxation times calculated for successive samples may be followed by a distributional analysis performed in either the time domain or relaxation spectrum domain. The process is repeated for other fluid samples and the data for successive fluid samples is compared so that the user may determine when the formation fluid consists almost entirely of connate oil.
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Arana Louis
Numar Corporation
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