Distribution measurement system for pressure, temperature, strain of material, monitoring method for carbon dioxide geological sequestration, assessing method for impact of carbon dioxide injection on integrity of strata, and monitoring method for freezing using same
US9829352B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Aug 7, 2013 |
| Grant date | Nov 28, 2017 |
| Priority date | — |
| Expiry date | Nov 19, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K11/322
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Distributions of a Brillouin frequency shift and a Rayleigh frequency shift in optical fibers set up in a material are measured from scattered waves of pulse laser light entered into the optical fibers, and distributions of pressure, temperature, and strain of the material along the optical fibers at a measurement time point are analyzed using coefficients that are inherent to the set up optical fibers and correlate pressure, temperature, and strain of material with the Brillouin frequency shift and the Rayleigh frequency shift.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.