Control system optimizes EOR steam generator output

PetroChina Co. Ltd. improved production safety, realized greater oil production, and saved energy costs after implementing model-free adaptive (MFA) control on its steam generators in Liaohe oil fields.Fig. 1 illustrates a typical enhanced oil recovery (EOR) steamflood in which injected high-pressure steam improves recovery from a reservoir containing heavy oil. In this process, the quality of the steam generated is difficult to monitor and control. Click here to enlarge imageFor optimal oil recovery, steam dryness should be about 72%. If the steam is too dry, energy is wasted. But on the other hand, oil recovery is inefficient if the steam is not dry enough.Process, steam drynessFig. 2 ...

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