Critical Gas Flow Rate
Definition - What does Critical Gas Flow Rate mean?
The critical gas flow rate can be defined as the flow rate of a gas, below which certain liquids cannot be pushed or lifted to the surface. Generally, this term is used in the production testing phase.
The critical gas flow rate is also the flow rate that is equal to the speed of sound in a particular fluid. If this rate is exceeded during the gas production phase then it can double the chances of corrosion in the pipelines. By way of comparison, the approximate speed of sound in water is 1.482 km/s (3316 mph).
Petropedia explains Critical Gas Flow Rate
Several tests are conducted on an oil well to determine its productivity and whether it is feasible to source oil and gas from it or not. During production testing, the critical gas flow rate is checked to determine whether the fluids from the bottom can be lifted on the surface or not.
Critical gas flow is the rate of the gas flow under which a few types of liquids cannot be pumped to the surface. If the critical gas flow rate is higher, it can lead to corrosion of the pipes.