France: Regeneration process improves NGL recovery system ///

ConocoPhillips is operating a turbo-expander NGL recovery process on its 2/4 J platform in Ekofisk field, offshore Norway. This NGL recovery unit processes a gas obtained by blending associated gases from different upstream separators and compressors. Recovered NGLs are then mixed with the oil to maximize the oil production. The tri-ethylene glycol (TEG) unit, upstream of the NGL recovery process, initially designed with the cold finger regeneration process gave, from its initial start-up in 1998, insufficient water dew pointing, resulting in recurrent freezing problems in the NGL recovery process. These freezing problems resulted in reduced NGL recoveries and, thus, production losses.

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