Process for improving the permeability of ground formations, adapted to the production of high temperature geothermic energy

摘要

This process comprises the three successive following steps of: (a) injecting into a formation a solution of sodium or potassium hydroxide during a limited time interval to perform a chemical leaching treatment of the formation, (b) injecting a saline solution, and (c) establishing a circulation of a heat conveying fluid through the formation.