Processing exhaust for use in enhanced oil recovery
AssigneeExxonMobil Upstream Research Company
InventorsRichard A. Huntington, Robert D. Denton, Patrick D. McMahon, Lalit K. Bohra, Jasper L. Dickson
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Abstract
A method for generating steam for hydrocarbon production is provided. The method includes producing steam using heat from an exhaust stream from a gas turbine system. A water stream is condensed from combustion products in the exhaust stream, and the water stream is used as a make-up water for production of the steam.
Claims30
A method for generating steam for hydrocarbon production, comprising:
- substantially stoichiometrically combusting a compressed oxidant and a fuel in a combustion chamber in a gas turbine system in the combined cycle power plant, thereby generating an exhaust stream containing combustion products;
- producing steam using heat from the exhaust stream;
- injecting at least a portion of the steam into a hydrocarbon reservoir;
- obtaining hydrocarbons and reproduced water from the hydrocarbon reservoir using a thermal recovery process;
- condensing a water stream from the combustion products in the exhaust stream;
- and
- using the water stream and at least a portion of the reproduced water as a make-up water for production of the steam.
A method for using exhaust from a combined cycle plant in hydrocarbon production, comprising:
- substantially stoichiometrically combusting a fuel and an oxidant in a gas turbine system in the combined cycle plant to produce an exhaust stream;
- producing steam using exhaust heat from the exhaust stream;
- injecting at least a portion of the steam into a hydrocarbon reservoir;
- obtaining hydrocarbons and reproduced water from the hydrocarbon reservoir using a thermal recovery process;
- condensing a water stream from the exhaust stream;
- using the water stream and at least a portion of the reproduced water as a make-up stream for the steam production;
- and
- driving a steam turbine with at least a second portion of the steam.
A system for generating power and thermally recovering hydrocarbons from a reservoir, comprising:
- a gas turbine system configured to produce a hot exhaust stream as a byproduct of substantially stoichiometric combustion of a compressed oxidant and a fuel;
- a heat recovery steam generator (HRSG) configured to produce a steam stream using the hot exhaust stream, wherein the HRSG delivers at least a portion of the steam stream to the thermal recovery system and produces a condensate stream from the combustion products in the hot exhaust stream;
- a hydrocarbon thermal recovery system configured to use at least a portion of the steam stream in a thermal recovery process and produce hydrocarbons and reproduced water;
- and
- a feed system configured to use the condensate stream and at least a portion of the reproduced water as make-up water provided to the HRSG to generate the steam stream.
Dependencies are inferred from the claim text.