Integrity eXplorer Service Evaluated Cement Despite Microannulus in Casing Overlap Section

Location: Caspian Sea

An operator in the Caspian region needed to evaluate 13,120 ft (4000 m) of cement behind a 7-in. liner within a 9 5 /8-in. casing. Cement quality was especially critical in this well due to the complex lithology and irregular depletion of formations. The operator was concerned that cross-flow between permeable zones could create well integrity issues. Temperature logs and a conventional cement bond log were acquired soon after the cement job to determine the top of cement. But after performing a pressure test of the casing, the operator suspected there was a microannulus between the cement and casing and committed to investigate further to confirm zonal isolation. Microannuli are interpreted as bad cement-tocasing bond on cement bond logs. This causes operators to spend a great deal of time and money trying to remediate their cement.

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Integrity eXplorer Cement Evaluation Service

Our Integrity eXplorer™ cement evaluation service provides accurate information to help operators make critical decisions that impact well integrity.

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