Rock-exploitation method based on thermodynamic cycles utilizing in-situ energy source

A rock-exploitation method based on thermodynamic cycles utilizing an in-situ energy source, comprising:

• sinking at least one well deeper than the producing horizon;
• admitting stratal fluid into the well;
• discharging said stratal fluid from the well below the producing horizon into a fluid-permeable rock means, said fluid being utilized as a heat-carrying medium in an underground circuit which includes means for admission of fluid into the well, a section of the well between a fluid inlet and a fluid outlet, and the fluid-permeable rock mass adjacent to said section of the well;
• and injecting a heat-carrying agent into the well where it circulates, said heat-carrying agent exchanging heat with said fluid within said section of the well, said heat-carrying agent having a higher temperature than the stratal fluid.

A rock-exploitation method based on thermodynamic cycles utilizing an in-situ energy source, comprising sinking at least one well to a producing horizon;

• forcing a heat-carrying agent into said well and circulating it therethrough with an outlet to a consumer;
• at the same time, feeding the well with a fluid contained in rock of the producing horizon;
• said heat-carrying agent transferring heat from the rock of the producing horizon by means of the fluid forced into said well;
• discharging said fluid with a varied heat content into fluid-permeable rock;
• separating the flows of hot and cold fluid by means of natural convection and by means of the section of said well from the fluid inlet to the fluid outlet;
• and circulating said fluid from its outlet from said well through the permeable rock in the direction of its inlet into the same well, while restoring its initial heat content.

A rock-exploitation method based on thermodynamic cycles utilizing an in-situ energy source, comprising:

• sinking at least one well as far down as a producing horizon;
• admitting stratal fluid into said well, said fluid being contained in the rock and being in contact therewith;
• discharging said fluid from the well above the producing horizon into a fluid permeable rock mass, said fluid being utilized as a heat-carrying medium in an underground circuit which includes means for admission of fluid into the well;
• a section of the well between the fluid inlet and the fluid outlet, and the fluid-permeable rock mass adjacent to said well section;
• injecting a heat-carrying agent into said well where it circulates, the temperature of said heat-carrying agent being higher than the temperature of said fluid containing in the rock of said producing horizon;
• said heat-carrying agent being cooled by said fluid within said well section.

A rock-exploitation method based on thermodynamic cycles utilizing an in-situ energy source, comprising:

• sinking at least one well deeper than the producing horizon;
• admitting stratal fluid into the well, said fluid being contained in the rock and being in contact therewith;
• discharging said fluid from the well above the producing horizon into a fluid-permeable rock mass, said fluid being utilized in an underground circuit comprising said means for admission of the fluid into the well, a section of the well between a fluid inlet and a fluid outlet, and the fluid-permeable rock mass adjacent to said well section;
• injecting a heat-carrying agent into said well where it circulates, the temperature of said heat-carrying agent exceeding that of the fluid contained in the rock of said producing horizon, said heat-carrying agent being cooled by said fluid within said well section.