Log gas rate (log-log)

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Does the rate have a sharp decline when plotted on a logarithmic scale?

The log scales tend to accentuate the problem, which may not be evident in Cartesian coordinates. The scale compression of large-time values accompanied by the scale expansion of low rates makes the problem more visible.
A sharp decline on a log-log plot indicates a problem.

Reasons for inconsistencies:

An abnormal decrease in the gas rate can indicate liquid loading.
Often accompanied by the production of liquids.
For additional information, see the WGR & water rate plot.