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Title: Field Application Comparison Conditioning Type Orifice Plates (4-holed) And Generic Cone Meters
Author: Mark W. Davis, Philip A. Lawrence
Source: 2009 International Symposium on Fluid Flow Measurement
Year Published: 2009
Abstract: Allocation measurement of produced hydrocarbon gas in the upstream area require different measurement techniques and strategies than those used for standard pipeline quality gas measurement due to the nature of the fluids in the system. Wet gas, hydrate formation, liquid slugging, well clean-up debris and short meter runs all add to the difficult task of collecting meaningful data from High Pressure Full Well Stream (HPFWS) allocation metering points. Various meter types have been employed for these flow regimes in order to meet the necessary accuracy requirements and the arduous duty that normally occurs in these applications. This paper details the real world experience of such a allocation metering system operating in Wyoming, USA that has wide ranging environmental patterns from below - 30 deg F (-34 deg C) in the winter to + 90 deg F (+32 deg C) in the summer all which can have an impact on the measurement. The operational experience and differences between the two metering technologies, conditioning orifice plate versus cone will be detailed. Meter selection criteria will be discussed based on facility design constraints in accordance with regulatory and environmental requirements, allocation accuracy needs, along with sustainable and cost effective approaches for implementation. Data from the field operator will be shown together with performance, calibration data and computational fluid dynamic imagery (CFD) for some meter types that were and are now being fitted to meet the operators measurement philosophy.

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