NMR logging interpretation of solid invasion
US11163087B2 · kind B2 · utility
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18Claims
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Key dates
| Filing date | Feb 4, 2019 |
| Grant date | Nov 2, 2021 |
| Priority date | — |
| Expiry date | Feb 1, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V11/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for estimating an effect on nuclear magnetic resonance (NMR) measurements of an invasion of solid particles into pores of an earth formation penetrated by a borehole includes conveying a carrier through the borehole and performing an NMR measurement on a volume of interest in the formation to provide a relaxation time constant using an NMR tool disposed at the carrier. The method further includes receiving information describing the solid particles in the pores and quantifying, using a processor, an effect on the measured relaxation time constant due to the invasion of solid particles using the received information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.