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INTEGRATED ENHANCED OIL RECOVERY PROCESS

  • US 20110146978A1
  • Filed: 12/16/2010
  • Published: 06/23/2011
  • Est. Priority Date: 12/17/2009
  • Status: Abandoned Application
First Claim
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1. An integrated process to (i) produce an acid gas-depleted product gas stream, (ii) produce an oxygen-rich gas stream, (iii) produce a hydrocarbon-containing fluid from an underground hydrocarbon reservoir via a hydrocarbon production well, and (iv) enhance production of the hydrocarbon-containing fluid from the underground hydrocarbon reservoir, the process comprising the steps of:

  • (1) injecting a pressurized nitrogen stream into the underground hydrocarbon reservoir to enhance production of the hydrocarbon-containing fluid from the underground hydrocarbon reservoir via the hydrocarbon production well;

    (2) recovering the hydrocarbon-containing fluid produced from the hydrocarbon production well;

    (3) separating the hydrocarbon-containing fluid into (a) a liquid hydrocarbon product stream and (b) a gaseous hydrocarbon product stream;

    (4) producing a synthesis gas stream from a carbonaceous feedstock, the synthesis gas stream comprising (a) carbon dioxide, and (b) at least one of hydrogen and methane;

    (5) treating the synthesis gas stream in an acid gas removal unit to produce the acid gas-depleted synthesis gas stream and a carbon dioxide-rich stream;

    (6) optionally treating the gaseous hydrocarbon product stream in the acid gas removal unit to produce an acid-gas depleted gaseous hydrocarbon product stream;

    (7) optionally combusting at least a portion of one or more of the acid gas-depleted synthesis gas stream, the gaseous hydrocarbon product stream and the acid-gas depleted gaseous hydrocarbon product stream;

    (8) separating an air stream into the oxygen-rich stream and a nitrogen-rich stream; and

    (9) pressurizing the nitrogen-rich stream to generate the pressurized nitrogen stream, wherein at least a portion of the oxygen-rich stream is used in one or both of steps (4) and (7).

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