CPC G01N 24/081 (2013.01) [G01R 33/50 (2013.01); G01V 3/32 (2013.01)] | 19 Claims |
1. A method for detection of solid organic matter and fluids in a geological formation sample by means of low field NMR (Nuclear Magnetic Resonance) in a single measurement, the method comprising the steps of:
i. providing a rock sample;
ii. submitting the sample to a 2D Nuclear Magnetic Resonance (NMR) assay comprising the application of a 2D pulse sequence with a saturation-recovery, or inversion-recovery, in an indirect dimension and a FID-CPMG in a direct dimension;
iii. obtaining a 2D T1-T2 map from the NMR assay;
iv. determining relaxation times;
v. assigning solid organic matter and fluid contributions based on the relaxation times, wherein solid organic matter is assigned transverse relaxation times shorter than approximately 200 microseconds;
vi. quantifying the amount of 1H nuclei in predefined regions in the 2D map by using a pre-calibration of an equipment response.
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