GLOSSARY

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Synonym: Behind-Casing Cross-Flow = Channeling


Specific type of Downhole cross-flow occurring behind the casing through:

open
Open space between casing and rocks (no cement filling)
channels
Channels and fractures in cement, filling the space between casing and rocks 
gaps
Gaps between cement sheath and rocks due to poor cement-rocks bond
gaps
Gaps between cement sheath and casing due to poor cement-casing bond
fissure

Fissure network in rocks behind

cement 

cement sheath 

Case Study Total Flow - TGTImage Added

Fig. 1. Example of  Behind-Casing Cross-Flow captured by the temperature and noise logs (courtesy of TGT)


See Also

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Petroleum Industry / Upstream / Petroleum Well / Well Performance Complications / Downhole cross-flow

[ Well Drilling ] [ Well completion ] [ Production (well flow status) ] [ Injection (well flow status) ] [ Flowing (well flow status) ] [ Shut-in (well flow status) ]

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