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Title: Fiscal Metering Systems Mismeasurement Management Experiences in Petronas
Author: Wan Adrie Wan Ahmad Han van Dal
Source: 2017 North Sea Flow Measurement Workshop
Year Published: 2017
Abstract: Mismeasurement management is about the detection and correction of systematic measurement errors in hydrocarbon quantities reported by a custody transfer flow metering system. A systematic (deterministic) error is due to an assignable cause, such as a transmitter failure, a disturbed meter pulse signal, a faulty parameter value or a measurement that fails its validation. This opposed to a non-deterministic error which is caused by natural variance. The correction of a measurement error is not an obvious task and requires in-depth analysis of all available information to determine an accurate substitution for the faulty value. A poor correction could increase the error instead of rectifying it. A separate correction is required for every associated transaction, e g. a transmitter failing its quarterly validation may require the correction of dozens of daily reports.

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