INTEGRATED SYSTEM AND METHOD FOR STEAM-ASSISTED GRAVITY DRAINAGE (SAGD)-HEAVY OIL PRODUCTION TO PRODUCE SUPER-HEATED STEAM WITHOUT LIQUID WASTE DISCHARGE
First Claim
1. A method for producing steam and gas mixtures for extracting heavy bitumen comprising:
- mixing fuel with oxidation gases, said fuel being selected from a group consisting of coal, crude oil, vacuum residue, asphaltin and petcoke, said oxidation gases being selected from a group consisting of oxygen, oxygen-enriched air, and air; and
combusting the mixture under high pressures and temperatures, the mixture containing water with organic or inorganic materials, the mixture generating a steam and gas mixture under a controlled temperature; and
transferring a liquid phase to a gas and solid phase, said gas phase being comprised of steam, carbon dioxide and solid particles, generated from combusting the mixture.
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Abstract
A method and system for producing steam for extraction of heavy bitumen including the steps of mixing carbon or hydrocarbon fuel. The fuel is crude oil, vacuum residue, asphaltin, petcoke or coal. The oxidation gas includes oxygen, oxygen enriched air or air-combustion of the mixture under high pressure and high temperature. The fuel is mixed with low quality contaminated water containing organics and inorganics. The liquid phase transferred to a gas phase includes steam and carbon dioxide, wherein solids are separated from the gas phase. The gas phase is mixed with saturated water to scrub the remaining solids and produce saturated steam. The solid rich water is recycled back for combustion. The saturated steam super-heated dry steam and gas mixture is send to an enhanced oil recovery facility for injection into an underground reservoir.
56 Citations
20 Claims
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1. A method for producing steam and gas mixtures for extracting heavy bitumen comprising:
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mixing fuel with oxidation gases, said fuel being selected from a group consisting of coal, crude oil, vacuum residue, asphaltin and petcoke, said oxidation gases being selected from a group consisting of oxygen, oxygen-enriched air, and air; and combusting the mixture under high pressures and temperatures, the mixture containing water with organic or inorganic materials, the mixture generating a steam and gas mixture under a controlled temperature; and transferring a liquid phase to a gas and solid phase, said gas phase being comprised of steam, carbon dioxide and solid particles, generated from combusting the mixture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for producing a steam and gas mixture for extraction of heavy bitumen comprising:
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mixing a fuel with an oxidation gas, said fuel being selected from a group consisting of coal, crude oil, vacuum residue, asphaltin and petcoke, said oxidation gas being selected from a group consisting of oxygen, oxygen-enriched air, and air; and partially combusting the mixture under high pressures and temperatures, the mixture being comprised of water with organic or inorganic materials, the mixture generating a steam and gas mixture under a controlled temperature; and transferring a whole liquid phase to a syngas and solid phase, said syngas phase being comprised of steam, carbon monoxide, hydrogen and solid particles generated from the step of partially combusting, producing a solid-rich gas phase flow; and separating the solids from the gas phase. - View Dependent Claims (16)
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17. A system for oil recovery using heat injection, comprising:
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a direct-contact steam generator operating on low quality fuel, oxidation gas, and water, said fuel being selected from a group consisting of coal, crude oil, vacuum residue, asphaltin and coke, said oxidation gas being selected from a group consisting of oxygen, oxygen-enriched air, or air, said water being any available water, without treatment, containing high level of organic and inorganic materials, said direct-contact steam generator producing a dry hot mixture of steam, carbon dioxide, flying solids and possibly other gases; and a solid-gas separation means to separate solids from gas flow using cyclonic separation, centrifugal separation, mesh separation or combinations thereof. - View Dependent Claims (18, 19, 20)
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Specification