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METHOD AND APPARATUS FOR ELECTRICAL HEATING OF HYDROCARBONACEOUS FORMATIONS

  • US 3,862,662 A
  • Filed: 12/12/1973
  • Issued: 01/28/1975
  • Est. Priority Date: 12/12/1973
  • Status: Expired due to Term
First Claim
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1. The method of electrically heating a subsurface formation situated between and immediately adjacent an upper and a lower layer each having a lower electrical resistivity than that of the formation comprising the steps of:

  • a. establishing a potential difference between a first and a second electrode means positioned respectively within the upper and lower layers and in electrical contact therewith and b. causing an alternating current to pass between said electrode means responsive to said potential difference along a plurality of paths through said formation determined by the relative resistivities of said formation and said upper and lower layers.

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