Advanced NMR analysis of pore type and pore connectivity in core samples including diffusional fluid exchange methods
US11898976B2 · kind B2 · utility
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Key dates
| Filing date | Mar 19, 2020 |
| Grant date | Feb 13, 2024 |
| Priority date | — |
| Expiry date | Mar 3, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A90/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for determining the pore types of a core sample can include: determining a porosity of a core sample, wherein the core sample has a permeability of 10 mD or less; saturating the core sample with a NMR saturation fluid to achieve a saturated core sample; taking a NMR measurement of fluids in the saturated core sample; and deriving a volume for a pore type based on the porosity based on a correlation between the NMR measurement and a NMR signal to fluid volume calibration, wherein the pore type is selected from the group consisting of a nanopore, a micropore, a macropore, and any combination thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.