Glossary

De-spiking

Removal or replacement of anomalously large, positive or negative, values from a logging data set. Acquired borehole image or dipmeter data can sometimes contain numerical values that are excessive or out of the range of the tool response. These values can act to skew summary statistics and processing procedures dependent on data ranges or averages, such as assignment of borehole image data into colour bins.

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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.