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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0103590 (1998-06-24) |
발명자 / 주소 |
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출원인 / 주소 |
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인용정보 | 피인용 횟수 : 333 인용 특허 : 38 |
An integrated process is disclosed for treating, at the surface, production fluids recovered from the application of in situ hydrovisbreaking to heavy crude oils and natural bitumens deposited in subsurface formations. The production fluids include virgin heavy hydrocarbons, heavy hydrocarbons conve
An integrated process is disclosed for treating, at the surface, production fluids recovered from the application of in situ hydrovisbreaking to heavy crude oils and natural bitumens deposited in subsurface formations. The production fluids include virgin heavy hydrocarbons, heavy hydrocarbons converted via the hydrovisbreaking process to lighter liquid hydrocarbons, residual reducing gases, hydrocarbon gases, and other components. In the process of this invention, the hydrocarbons in the production fluids are separated into a synthetic-crude-oil product (a nominal butane to 975.degree. F. fraction with reduced sulfur, nitrogen, metals, and carbon residue) and a residuum stream (a nominal 975.degree. F.+ fraction). Partial oxidation of the residuum is carried out to produce clean reducing gas and fuel gas for steam generation, with the reducing gas and steam used in the in situ hydrovisbreaking process.
[ We claim:] [1.] An integrated process for continuously converting, upgrading, and recovering heavy hydrocarbons from a subsurface formation and for treating, at the surface, production fluids recovered by injecting steam and reducing gases into said subsurface formation--said production fluids bei
[ We claim:] [1.] An integrated process for continuously converting, upgrading, and recovering heavy hydrocarbons from a subsurface formation and for treating, at the surface, production fluids recovered by injecting steam and reducing gases into said subsurface formation--said production fluids being comprised of converted liquid hydrocarbons, unconverted virgin heavy hydrocarbons, reducing gases, hydrocarbon gases, solids, water, hydrogen sulfide, and other components--to provide a synthetic-crude-oil product, and said integrated process comprising the steps of:a. inserting a downhole combustion unit into at least one injection borehole which communicates with at least one production borehole, said downhole combustion unit being placed at a position within said injection borehole in proximity to said subsurface formation;b. flowing from the surface to said downhole combustion unit within said injection borehole a set of fluids--comprised of steam, reducing gases, and oxidizing gases--and burning at least a portion of said reducing gases with said oxidizing gases in said downhole combustion unit;c. injecting a gas mixture--comprised of combustion products from the burning of said reducing gases with said oxidizing gases, residual reducing gases, and steam--from said downhole combustion unit into said subsurface formation;d. recovering from said production borehole, production fluids comprised of converted and unconverted hydrocarbons, as well as residual reducing gases, and other components;e. at the surface, treating said production fluids to recover thermal energy via heat transfer operations and to separate produced solids, reducing gases, hydrocarbon gases, and upgraded liquid hydrocarbons comprised of said converted liquid hydrocarbons and said unconverted heavy hydrocarbons;f. distilling said upgraded liquid hydrocarbons to produce a light fraction comprising a synthetic crude oil ("syncrude") product and a heavy residuum fraction;g. in a partial oxidation unit, carrying out partial oxidation of said heavy residuum fraction to produce a raw synthesis-gas stream;h. carrying out gas-treating operations on said raw synthesis-gas stream--comprising the removal of solids, hydrogen sulfide, carbon dioxide, and other components--to produce a clean reducing-gas mixture and a fuel gas;i. carrying out treating operations on the hydrocarbon gases and reducing gases of step e to remove water, hydrogen sulfide, and other undesirable components and to separate hydrocarbon gases and reducing gases;j. combining said reducing gases of steps h and i to produce a composite reducing-gas mixture for injection into said subsurface formation;k. in a steam plant, generating partially saturated steam for injection into said subsurface formation, using as fuel said fuel gas of step h and said separated hydrocarbon gases of step i;l. continuing steps a through k until the recovery of said heavy hydrocarbons within said subsurface formation is essentially complete or until the rate of recovery of the heavy hydrocarbons is reduced below a level of economic operation.
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