Well gauging system and method

The well gauging system and method includes two containment vessels (17, 15), a common inlet line to the vessels with divert control valves on each inlet line of the vessels being controlled by a programmable logic controller (PLC), a common outlet line to the 5 vessels, a common gas line attached to the top of each vessel, which has low and high pressure regulators allowing control of the vessel's internal pressure, a vertical level indication device for controlling level in each vessel, a water cut meter (47) used to report water cut of the production stream, a coriolis meter (49), valves, gas cylinder, a controller for process control of well testing, storing results, and sending results to a customer's central 10 computer. The method of using two vessels (17, 15) allows more time for the emulsion to separate, thus increasing the accuracy of the oil, water, and gas measurements.