Method for extracting bitumen and/or ultra-heavy oil from an underground deposit, associated installation and operating method for said installation

A method for extracting bitumen and/or extra-heavy oil from an underground deposit, comprising:

• lowering the viscosity of the bitumen and/or extra-heavy oil “in situ”, by supplying energy to the deposit in a form of steam flowing through the deposit and electric power for inductive and/or resistive heating;
• generating in a decentralized manner the energy for generating the steam and also for electric heating at a site of the extraction facilities;
• and
• using part of the extracted bitumen and/or extra-heavy oil for operating an industrial turbine having a generator coupled thereto for the purpose of generating electric power,
• wherein the electric generator supplies the power required for electric heating purposes and a boiler associated with the industrial turbine is used for generating steam by evaporation of water that is separated and recovered from the extracted bitumen and/or extra-heavy oil,
• wherein the method further comprises providing at least one well pad for distributing said steam and said electrical power, to which the electric power generated in the generator and power in the form of steam are simultaneously supplied in a ratio of between 1 to 3 and 1 to 4.