Advanced NMR analysis of porosity and other properties in core samples using hydraulic fluid exchange
US11815481B2 · kind B2 · utility
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19Claims
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Key dates
| Filing date | Mar 19, 2020 |
| Grant date | Nov 14, 2023 |
| Priority date | — |
| Expiry date | Sep 7, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A90/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for determining the porosity of a core sample can include: 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 NMR measurement of fluids in the saturated core sample; determining a porosity of the core sample based on a correlation between the NMR measurement and a NMR signal to fluid volume calibration.
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