Development of Crystal Growth Sonde for Experiment of CO₂ Sequestration

Abstract

  Moderate high-pressure condition less than several tens MPa can be very useful for reproduction of deep underground environments to be utilized for waste disposal of CO₂. Recent development in the feasibility test of CO₂ sequestration has been achieved by phase-shift interference microscopy, laboratory in-situ measurement of calcite growth rate in the high-temperature and high-pressure cell and ex-situ measurement of calcite reacted in the crystal growth sonde diving into natural geothermal underground. These two approaches enable precise validation of safety storage of CO₂ and its life-time.