We cannot tell how 'good' a well is unless we can estimate the maximum flow possible under such ideal conditions as complete permeability at the production horizon and boiling point throughout the depth of the reservoir. Calculated Lip pressures for vertical wide-open discharge under these conditions are surprisingly independent of the kind of fluid tapped by the well, whether dry saturated steam or saturated hot water.

The status of an actual well can be established by comparing the measured Lip pressure with the calculated theoretical maximum.

Discharges are simply determined from the values of Lip pressure and supply fluid enthalpy.

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