Methods for treatment and use of produced water

a technology for producing water and treatment methods, applied in the nature of treatment water, multi-stage water/sewage treatment, borehole/well accessories, etc., can solve the problems of ion exchange system, hydrocyclone, etc., and affecting the efficiency of filtration, lime softening, etc., to improve the method of steam use, improve the effect of filtration process and reducing or even eliminating
US20130075098A1Inactive Publication Date: 2013-03-28FLUOR TECH CORP
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Patent Information

Authority / Receiving Office
US ยท United States
Patent Type
Applications(United States)
Current Assignee / Owner
FLUOR TECH CORP
Publication Date
2013-03-28
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

Produced water is treated by raising the pH to a level that significantly increases silica solubility and breaks emulsions. So treated water is then de-oiled, filtered, and subjected to ion exchange chromatography to reduce water hardness prior to feeding into a steam generator to form an intermediate quality steam. If desired, the intermediate quality steam is directly used in SAGD, or separated into a high quality steam and condensate, which is further treated to obtain additional water that can then be used in the steam generator.
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Description

[0001] This application claims the benefit of priority to copending U.S. provisional applications with Ser. Nos. 61 / 539,883, filed Sep. 27, 2011, and 61 / 621,145, filed Apr. 6, 2012.FIELD OF THE INVENTION

[0002] The field of the invention is methods and use of treated produced water, especially as it relates to treatment and use for enhanced oil recovery (EOR) and steam assisted gravity drainage (SAGD).BACKGROUND

[0003] Enhanced Oil Recovery (EOR) of heavy thick oil or Bitumen is often done by injecting steam into a formation, resulting in a combination of condensed steam and oil and / or melted bitumen that is later separated into the hydrocarbon product and โ€œproduced waterโ€. For example, steam-based tar sands EOR, also known as steam assisted gravity drain (SAGD), requires about three barrels of water equivalent of steam to produce one barrel of liquid bitumen product. Such relatively high quantities of water demand can present significant challenges, especially where recovery and recycli...

Claims

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