Patent ID: 7849921
Filing Date: 2010-12-14
Classification: C02F,E21B,Y10S

Abstract:
1. A process for treatment of a produced water stream resulting from the production of oil from heavy oil reserves, wherein said treatment comprises: (a) evaporating of said produced water stream at a pH of at least 10.5 to generate (i) a distillate stream at about 95% or more by volume of said produced water stream and (ii) a blowdown stream at about 5% or less by volume of said produced water stream; (b) generating a steam stream at about 100% quality and at about 1000 pounds per square inch pressure or more from said distillate stream, and wherein said steam stream comprises at least about 70% by weight of said distillate stream, and generating a blowdown stream of about 30% or less by weight of said distillate stream.