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Custody Transfer

Challenge:  Many factors must be considered in the design of custody transfer systems for offshore facilities. Answers are needed to such questions as how and where the measurements will be done and what volumes are expected? Should the system be based on metering of flow, or should it be based on level measurement before and after a discharge?  Will tie-ins be added in the future resulting in greater-than-anticipated production? Will measurements be by volume (United States) or by mass as is the practice throughout the rest of the world? Such considerations will ultimately determine just where to make the measurements, what level sensors or flow meters are used, and how they should be sized. The basic challenges on operating platforms relate to measurement accuracy, proper sampling and analysis of constituents, and verification of meter readings.

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Solution: Emerson is well-positioned to serve the needs of all companies making custody transfer measurements offshore. Design consultants from Daniel, Micro Motion, METCO and Marine Tank Management as well as other Emerson divisions are available to help customers create optimal measurement systems for any specific offshore facility. A wide range of highly accurate metering devices include orifice plate meters, Coriolis meters, turbine meters. Suitable instruments and systems for level based Custody Transfer are also included in Emerson’s offering Rosemount CTS.

 

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