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Oilfield Glossary
Oilfield Glossary
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regression

1. n. [Geology]
The migration of shoreline into a basin during progradation due to a fall in relative sea level. Deposition during a regression can juxtapose shallow-water sediments atop deep-water sediments.
Antonyms: transgression
2. n. [Reservoir Characterization]
The statistical fitting of trend lines to a data set. Many regression methods are available, including linear, iterative, multiple and polynomial. If there is a 'good' fit to the data, then the variables are often assumed to be dependent.