Systems And Methods To Place A Thermally Conductive Sheath In A Geothermal Well

A method of forming a high-thermal conductivity multi-segmented compacted TRE sheath around a liner that is disposed in a wellbore at a target location within a geological formation, comprising:

• installing a liner in the wellbore to form a first annular space, wherein the first annular space exists between the liner and the wellbore wall and begins at the bottom of the wellbore;
• attaching a tie back to an upper end of the liner to form a second annular space, wherein the second annular space exists between the tie back and the wellbore wall, and begins where the tie back and liner are coupled to each other;
• wherein the first annular space is fluidly coupled to the second annular space;
• feeding a mixture, comprising a plurality of thermal reach enhancement (TRE) particles and a high apparent viscosity carrier fluid that suspends the particles, through the second annular space into the first annular space to a height above the liner and below an upper end of the tie back;
• breaking viscosity of the mixture;
• waiting for a time sufficient to allow TRE particles to settle around the liner to thereby form a settled particle sheath;
• consolidating the settled particle sheath via hydraulic and/or chemical consolidation, to thereby form a compacted TRE sheath;
• and optionally removing the tie back.