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Method for consolidating formation surrounding borehole

  • US 4,703,800 A
  • Filed: 06/30/1986
  • Issued: 11/03/1987
  • Est. Priority Date: 04/25/1984
  • Status: Expired due to Term
First Claim
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1. A method of treating an unconsolidated formation surrounding a borehole to form a permeable consolidated formation, the method consisting essentially of the steps of:

  • (A) heating the unconsolidated formation adjacent said borehole to a temperature in the range of 35°

    C. to 135°

    C. sufficient to support low temperature oxidation of oil contained within said formation without relying on high injection pressure or fracture of the formation, then(B) injecting unheated oxygen-containing gas into the borehole and into contact with said heated formation for a predetermined time to consolidate the formation by way of the precipitation of asphaltenes in said formation, such injection being carried out at a low volume rate to avoid fracturing of the formation.

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