Poor cement quality

20 August 2019 We have drilled three appraisal wells and in all three cement quality after evaluating with CBL/VDL showing poor cement behind the casing which could not easily call it proper isolation.
We have checked whatever possible and was suspicious to be the reason, but nothing were found as clear reasonable answer, why cement is poor.
Our cementer contractor is one the well known cementers in drilling industry. the latest pretext from cementer which looks arbitrary answer, is due to formation, which is mostly shale, sandstone and silt stone. 
anybody has any idea or similar experience?
thanks

1 Answer(s)

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