| 摘要 |
A method and apparatus for processing nuclear magnetic resonance information (76) to differentiate between oil based mud filtrate (OBM), and connate oils, during subsurface exploration. An NMR experiment is performed on a sample (70) of formation fluid, and the resulting data is processed to differentiate the relaxation parameters (80) characteristic of OBMs and those characteristic of connate oils. A simple arithmetic difference (84) between relaxation times calculated for successive samples may be followed by a distribution analysis performed in either the time domain or relaxation spectrum domain (86, 94).
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