Challenges in Custody Metering System in Unstabilized Crude

The Design, Installation, commissioning and handover of Custody metering system is very very critical for any project completion. This paper addresses major challenges and the corresponding mitigation methodologies in the design of a custody metering system in an unstabilized crude application in recent Buhasser FFD project. Custody meter is provided for measuring the Oil production from Bu Haseer Production Separator in Zakum plant at Das Island. The Custody meter is fiscal type and designed as a packaged unit. Custody meter package consist of one working, one standby arrangement and one common pipe proving system. The Metering Package includes the following main equipment and instruments: Coriolis flow meters.Pressure and Temperature transmitters.Proving system with double block and bleed valves.Automatic Sampling systemFlow computing systemInlet/Outlet Valves (MOVs) The Bu Haseer Oil at the outlet of Custody meter is routed to the existing Zakum Inlet oil manifold which is feeding to all existing Separation trains in the Zakum plant.