CPC G01N 24/081 (2013.01) [G01R 33/44 (2013.01); G01V 3/14 (2013.01); G01V 3/38 (2013.01); G01R 33/34092 (2013.01)] | 19 Claims |
1. A method comprising:
saturating a core sample with a nuclear magnetic resonance (NMR) saturation fluid, wherein the core sample has a permeability of 100 milliDarcy(mD) or less, to achieve a saturated core sample;
taking a first NMR measurement of fluids in the saturated core sample;
hydraulically exchanging a fluid in the saturated core sample with a NMR exchange fluid;
taking a second NMR measurement of the saturated core sample after hydraulic exchange;
determining a porosity of the saturated core sample based on a correlation between the first NMR measurement, the second NMR measurement and a NMR signal to fluid volume calibration;
deriving a saturated core sample property based on at least the porosity and a comparison between the first NMR measurement and the second NMR measurement, wherein the saturated core sample property identifies an amount of water disposed in nanopores of the saturated core sample relative to macropores of the saturated core sample; and
developing a production plan based on the amount of water disposed in nanopores of the saturated core sample relative to macropores of the saturated core sample.
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