INTEGRATION TECHNIQUES FOR STEAM GENERATION AND PRODUCED WATER TREATMENT FOR THERMAL IN SITU RECOVERY OPERATIONS

摘要

Techniques for generating steam and treating de-oiled produced water can include various steps that involve recycling certain streams and using a Once Through Steam Generator (OTSG). A first de-oiled produced water stream can be softened to produce softened water. A second de-oiled produced water stream can be subjected to evaporation to produce a distillate. Portions of the distillate and the softened water can be fed as a boiler feed water stream to an OTSG to produce wet steam, which is separated into dry steam and a blowdown stream with a concentrated level of impurities. At least a recycle portion of the blowdown stream can be sent back as part of the boiler feed water stream. In addition, multiple steam generation trains, which each use an OTSG, can be integrated to reuse certain aqueous streams.