DIRECT STEAM GENERATION OF BOILER BLOWDOWN
First Claim
Patent Images
1. A method of generating steam, comprising:
- injecting water into an initial steam generator to produce steam and a liquid effluent containing a remainder of the water with impurities; and
injecting the liquid effluent into a direct steam generator to vaporize at least part of the liquid effluent upon contact with combustion products such that a resulting gas phase including additional steam and carbon dioxide is output separate from a non-gas phase waste stream.
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Abstract
Systems and methods generate steam from produced water by passing the produced water through first and second steam generators coupled together. The first steam generator produces wet steam in which a liquid effluent with impurities of the produced water passes to the second steam generator. The second steam generator combusts fuel and oxidant in direct contact with the liquid effluent. The first and second steam generators limit fouling and waste while providing a combined steam output that may include combustion products from only the second steam generator.
19 Citations
20 Claims
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1. A method of generating steam, comprising:
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injecting water into an initial steam generator to produce steam and a liquid effluent containing a remainder of the water with impurities; and injecting the liquid effluent into a direct steam generator to vaporize at least part of the liquid effluent upon contact with combustion products such that a resulting gas phase including additional steam and carbon dioxide is output separate from a non-gas phase waste stream. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for generating steam, comprising:
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an initial steam generator coupled to receive water and having a first output for steam and a second output for liquid effluent containing a remainder of the water with impurities; and a direct steam generator coupled to receive the liquid effluent for at least partial vaporization upon contact with combustion products and having a third output for a resulting gas phase including additional steam and carbon dioxide and a fourth output for a non-gas phase waste stream. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of generating steam, comprising:
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recovering production fluid from a reservoir; separating the production fluid into an oil stream and a water stream; generating steam from the water stream by partial vaporization of the water stream while isolated from fluid communication with combustion products and then further vaporization of the water stream while in fluid communication with combustion products; and injecting the steam into the reservoir for a steam assisted gravity drainage operation.
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Specification