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Oilfield Glossary
Oilfield Glossary
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back flow

1. n. [Well Testing]
Fluid flow in the borehole from one zone into another in response to pressure differences between the zones. Any time the wellbore pressure rises above the average pressure in any zone, backflow will occur. Analysis of buildup tests involving backflow is either impossible or extremely difficult and usually requires expert input to determine useful information from such tests.
Synonyms: backflow