Delegates at the Upstream Production Measurement Forum, which was held in Houston in February, expressed interest in a new calibration methodology being developed at TUV SUD NEL. The technology, which was introduced in a paper delivered by Flow Measurement Consultant Craig Marshall, is designed to improve the accuracy of differential pressure meters.
“My paper looked at the measurement of heavy oils using differential pressure meters and outlined a new, research-proven method that can improve the accuracy of flow measurements in heavy oils that have a low Reynolds number,” Craig explains. “Delegates at the forum were very interested and I got some great questions at the end of my presentation. Although this is not a commercial product yet, we have shown through market research that there is industry demand for the new technique and feedback at Houston underlined this.”
“Accurate flow measurement in heavy oils (below a Reynolds number of 2 x 104) is extremely difficult using traditional flow measurement technology due to the increase in frictional forces through the meter,” Craig explains. “If the Reynolds number is not accurately known then potentially significant errors in flow measurement of up to 40% can be introduced.”
Craig’s new method can remove these errors by providing the Reynolds number of a flow in real-time. This, in turn, allows it to provide a corrected discharge coefficient. Furthermore, his approach can deliver a calculation of the density and the viscosity of a fluid, providing a 3-in-1 measurement solution. Craig’s is one of the first measurement techniques that is independent of operating Reynolds number, which makes it ideal for heavy oil flow measurement.
The Upstream Production Measurement Forum (UPM Forum) is a not-for-profit, industry-organized conference and exhibition that addresses the needs for flow measurement in land, offshore topsides and subsea oil and gas production. The 2018 forum brought together operators, suppliers, researchers and regulators to share information and developments.
Contact Craig Marshall