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INTEGRATED ENHANCED OIL RECOVERY PROCESS

  • US 20110146979A1
  • Filed: 12/16/2010
  • Published: 06/23/2011
  • Est. Priority Date: 12/17/2009
  • Status: Active Grant
First Claim
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1. An integrated process to (i) produce an acid gas-depleted hydrocarbon product gas stream, (ii) produce a hydrocarbon-containing fluid from an underground hydrocarbon reservoir via a hydrocarbon production well, and (iii) enhance production of the hydrocarbon-containing fluid from the underground hydrocarbon reservoir, the process comprising the steps of:

  • (1) injecting a pressurized sour carbon dioxide 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 optionally comprising hydrogen sulfide;

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

    (5) treating the synthesis gas stream and optionally the gaseous hydrocarbon product stream in an acid gas removal unit to produce the acid gas-depleted hydrocarbon product gas stream and a sour carbon dioxide stream;

    (6) pressurizing the sour carbon dioxide stream to generate the pressurized sour carbon dioxide stream,wherein (i) at least one of the synthesis gas stream and the gaseous hydrocarbon product stream comprises more than a trace amount of hydrogen sulfide, and (ii) if the gaseous hydrocarbon product stream comprises more than a trace amount of hydrogen sulfide, then both the synthesis gas stream and the gaseous hydrocarbon product stream are treated in the acid gas removal unit to produce the acid gas-depleted hydrocarbon product gas stream and the sour carbon dioxide stream.

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