Nuclear magnetic resonance 1H and 13C multiphase flow measurements, estimating phase selected flow rates from velocity distributions, volume fractions, and mean velocity
US8729893B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 2010 |
| Grant date | May 20, 2014 |
| Priority date | — |
| Expiry date | Oct 16, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/445
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for estimating a flow rate of a phase of a multiphase fluid is disclosed. A first velocity distribution is obtained for a first set of nuclei in the fluid from a Nuclear Magnetic Resonance (NMR) signal received for the fluid in response to a first NMR excitation signal. A second velocity distribution is obtained for a second set of nuclei in the fluid from an NMR signal received for the fluid in response to a second NMR excitation signal. A velocity of the phase is estimated from the first velocity distribution and the second velocity distribution. The flow rate of the phase is estimated using the estimated velocity of the phase and an estimated volume fraction of the phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.