Slurry and use thereof for enhancing geothermal energy production from heat reservoir and method for producing same

A method comprising:

• receiving a reservoir stress value and a pore pressure value of a subterranean heat reservoir where a thermal pathway is to be formed;
• determining a thermal pathway stress load from the pore pressure value and the reservoir stress value;
• setting a target thermal conductivity of the thermal pathway;
• preparing a slurry for injecting into the subterranean heat reservoir at a location where the thermal pathway is to formed, the slurry comprising thermal particles and a carrier fluid;
• wherein:
• the thermal particles have a selected volume, material composition and physical properties sufficient to form the thermal pathway with a particle pack thermal conductivity that meets or exceeds the target thermal conductivity at the determined thermal pathway stress load;
• and
• the carrier fluid has a selected fluid volume and fluid viscosity sufficient for the slurry to be injected into openings of the subterranean heat reservoir at an injection pressure higher than the obtained reservoir stress to form the thermal pathway after full closure;
• and
• mixing the selected volume of thermal particles and the selected volume of carrier fluid to produce the slurry.