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Oil recovery process

  • US 4,333,529 A
  • Filed: 08/29/1980
  • Issued: 06/08/1982
  • Est. Priority Date: 08/31/1979
  • Status: Expired due to Term
First Claim
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1. A continuous process for the recovery of oil from an oil deposit, which comprises:

  • (a) continuously feeding an aqueous dispersion of carbonaceous material having a concentration of about 10 to about 20 wt.% COD to an enclosed reaction zone,(b) continuously contacting said aqueous dispersion of carbonaceous material with an oxidizing gas in said enclosed reaction zone at a temperature of about 200°

    to about 350°

    , at a pressure of about 500 to about 3000 psi and for a time of about 5 to about 120 minutes to effect substantial wet oxidation combustion of said carbonaceous material to form a product gas stream having a pressure of about 500 to about 3000 psi and containing about 50 to about 95% by volume of steam, about 5 to about 50% by volume of carbon dioxide and 0 to about 35% by weight of nitrogen,(c) continuously injecting said product gas stream into said oil deposit under sufficient pressure to cause said oil to be ejected from said deposit in aqueous admixture,(d) continuously recovering oil from said ejected aqueous admixture to leave an aqueous medium containing residual quantities of said oil in a concentration of about 1000 to about 10,000 ppm COD,(e) continuously adding to said aqueous medium sufficient quantity of a fossil fuel to provide an aqueous dispersion of carbonaceous material having a concentration of about 10 to about 20 wt.% COD, and

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