Thermochem - High-Accuracy Well Testing Operations Services- Brochure

Geothermal Well Testing has traditionally been performed using atmospheric cyclone separators with a James Tube at the inlet to measure total mass flow and a weir box at the outlet to measure brine flow (Figure 1). The James Tube calculation requires enthalpy as an input which can be determined by iteration of the total mass flow and the separated brine flow. This technique has been used without modification or improvement for over 40 years (James. 1966). Accuracy estimates for total mass flow by this method range from +/- 5 to +/- 25% (Jung, 2001).