Method for analyzing cement quality in multi-string cased wells using sonic logging
US10890681B2 · kind B2 · utility
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18Claims
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Key dates
| Filing date | May 18, 2016 |
| Grant date | Jan 12, 2021 |
| Priority date | — |
| Expiry date | Jan 13, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/2636
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods and systems are provided for determining cement quality in an outer annulus of a multi-string cased wellbore having an inner annulus of mud. Data from a sonic logging tool is processed to obtain a slowness dispersion. The slowness dispersion is compared to a plurality of model slowness dispersions generated for a plurality of different values for cement quality in the outer annulus. The cement quality in the outer annulus is determined based on the comparison.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.