Maintain flowmeter accuracy while decreasing capex and nonproductive time
The low-rate extender was installed for a trial test in June 2020. Because it reduced the Vx Spectra flowmeter venturi cross-sectional area, the measured differential pressure increased by about four times—expanding the existing 29-mm flowmeter operating envelope and resulting in more accurate flow rate measurement versus replacing the meter for a smaller 19-mm size. After the low-rate extender installation, Vx Spectra flowmeter measurements were compared with production separator data in real time, and the flowmeter metrological specifications and operating envelope were proven to be maintained.
The operator saved capex and nonproductive time by running the same unit for an extended period, accommodating the flow rate changes from an initial high production to production decline. This demonstrates the low-rate extender’s capability to maintain high-accuracy metering for the life of the well. It can even be added during the initial meter installation to proactively plan for flow rate changes in depleting wells.