The FloWatcher system provides continuous measurement of downhole flow rate, fluid density, pressure, and temperature in real time.
The system uses two high-precision quartz gauges to measure the pressure drop across a venturi nozzle; this drop is directly proportional to the square of the fluid velocity. The pressure difference between one of these gauges and a third high-precision quartz gauge placed further down the well is also measured. The fluid density can be determined from the pressure gradient.
The data enable early identification of production and reservoir anomalies, such as water or gas breakthrough, helping to reduce the cost of remediation and optimize production planning and recovery. Two-phase total flow rate and gas or water cut can be determined. Using these downhole flowmeters in multiple wells has allowed deepwater operators to avoid the time, expense, and risk of production well testing in individual wells.
Applications of this versatile system include