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Title: RECOGNITION & RESOLUTION OF PROBLEMS WITH GAS ULTRASONIC FLOW METERS
Author: Joel Nava
Source: 2022 Appalachian Gas Measurement Short Course
Year Published: 2022
Abstract: Pipeline Operators have used Ultrasonic meters commer- cially for gas custody transfer applications since the late 90s. These meters combination of operating features, including superior rangeability and on-board diagnostics have made this the technology of choice for most high vol- ume gas metering applications. As user comfort with, and capabilities of, the technology has increased and the size and cost of ultrasonic meters has decreased, Operators and Manufacturers continue to stretch the envelope of ap- plication possibilities. This includes use in upstream, cor- rosive and high CO2 applications, where the technology previously couldnt work or didnt make economic sense. With these meters proliferation both in numbers and use-cases, the need to apply smart meter diagnostics is of increased importance to identify and address op- erating issues early that may affect measurement accu- racy. Near real-time data requirements are demanded by wide-spread business restructuring of gas transportation Pipelines into MLPs (Master Limited Partnerships) in the wake of de-regulation. These new business structures re- quire daily cash-out and balancing in many cases, and monthly accounting settlement of transportation accounts in all cases, so the facility to recognize and fix measure- ment problems within an accounting period (i.e., prior to month-end business close) is imperative to avoid what have become in the MLP era, painful PPAs (prior period adjustments).

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