Modified pulse sequence to estimate properties
US10557809B2 · kind B2 · utility
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26Claims
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Key dates
| Filing date | May 9, 2017 |
| Grant date | Feb 11, 2020 |
| Priority date | — |
| Expiry date | Jan 16, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N11/16
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods and related systems are described for estimating fluid or rock properties from NMR measurements. A modified pulse sequence is provided that can directly provide moments of relaxation-time or diffusion distributions. This pulse sequence can be adapted to the desired moment of relaxation-time or diffusion coefficient. The data from this pulse sequence provides direct estimates of fluid properties such as average chain length and viscosity of a hydrocarbon. In comparison to the uniformly-spaced pulse sequence, these pulse sequences are faster and have a lower error bar in computing the fluid properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.