Methods for enhancing and maintaining heat transfer efficiency between geothermal heat and injection fluid

A method comprising:

• injecting a working fluid having a first temperature into an injection inlet of a first wellbore penetrating a first portion of a subterranean formation, wherein the injection inlet is disposed at a first location at or near a surface of the subterranean formation;
• allowing at least a portion of the working fluid to flow from the injection inlet to a production outlet of a second wellbore penetrating a second portion of the subterranean formation, wherein the production outlet is disposed at a second location at or near the surface of the subterranean formation;
• producing the portion of the working fluid out of the production outlet at a first rate and at a second temperature that is higher than the first temperature;
• halting or slowing a rate of production of the working fluid from the production outlet for a first period of time;
• and
• resuming or increasing the rate of production of the working fluid from the production outlet at or near the first rate after the first period of time, wherein the first wellbore and the second wellbore are different.

A method comprising:

• injecting an etching agent into an injection inlet of a first wellbore penetrating a first portion of a subterranean formation;
• injecting a scale inhibitor into the injection inlet;
• injecting a working fluid having a first temperature into the injection inlet disposed at a first location at or near a surface of the subterranean formation;
• allowing at least a portion of the working fluid to flow from the injection inlet to a production outlet of a second wellbore penetrating a second portion of the subterranean formation, wherein the production outlet is disposed at a second location at or near the surface of the subterranean formation;
• producing the portion of the working fluid out of the production outlet at a first rate and at a second temperature that is higher than the first temperature;
• halting or slowing a rate of production of the working fluid from the production outlet for a first period of time;
• and
• resuming or increasing the rate of production of the working fluid from the production outlet at or near the first rate after the first period of time,
• wherein the etching agent and the scale inhibitor comprise N-(phosphonomethyl) iminodiacetic acid (PMIDA),
• wherein the first wellbore and the second wellbore are different.