1. n. [Production Logging]

A description of the geometrical distribution of a fluid moving through a pipe. The term is similar to the term flow regime, but is used to describe larger scale features in which there may be more than one flow regime. For example, in a deviated well there may be bubble flow of gas in oil in the uppermost part of the pipe, and water only in the lowest part.

See related terms: bubble flow,  flow regime