Water treatment method for heavy oil production

Details Water treatment method for heavy oil production Water treatment method for heavy oil production

E - Fixed Constructions

21

B

E21B 43/24 (2006.01) C09K 8/592 (2006.01) E21B 43/40 (2006.01)

Patent

CA 2748560

A process for treating produced water to generate high pressure steam. Produced water from heavy oil recovery operations is treated by first removing oil and grease. Pretreated produced water is then fed to an evaporator. Up to 95% or more of the pretreated produced water stream is evaporated to produce (1) a distillate having a trace amount of residual solutes therein, and (2) evaporator blowdown containing substantially all solutes from the produced water feed. The distillate may be directly used, or polished to remove the trace residual solutes before being fed to a steam generator. Steam generation in a packaged boiler, such as a water tube boiler having a steam drum and a mud drum with water cooled combustion chamber walls, produces 100% quality high pressure steam for down-hole use.

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