Glossary
Mudcake (wallcake)
Solid residue that accumulates on a borehole wall as drilling filtrate penetrates the formation. Mudcake can become thick enough to limit the ability of dipmeters and imaging tools, in particular borehole televiewers, to acquire meaningful data from the borehole wall. The presence of thick mudcake (detected with calipers) is often used as an indicator of high formation permeability.
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About the glossary
This listing is not exhaustive or definitive, do not expect Oxford English Dictionary standards; it is aimed at those who need to understand basic principles and those that read reports on dipmeters and borehole images requiring some technical help to get the most from such documents.
We have attempted to make the descriptions and explanations generic, giving the glossary a wide application and appeal, with minimal, if any, commercial bias. If you spot any mistakes, omissions or any problems with the explanations, please do not hesitate to contact us, and we will try to accommodate your comments.
Acknowledgements
This listing has been derived by Task Geoscientists. All external sources are fully acknowledged.