SYSTEM FOR MEASURING DISTRIBUTIONS OF PRESSURE, TEMPERATURE, STRAIN OF SUBSTANCE, METHOD FOR MONITORING UNDERGROUND STORAGE OF CARBON DIOXIDE USING SAME, METHOD FOR EVALUATING INFLUENCE OF CARBON DIOXIDE INJECTION ON STABILITY OF STRATUM, AND FREEZING MONITORING METHOD

摘要

The present invention is designed to measure the distributions of a Brillouin frequency shift and a Rayleigh frequency shift in an optical fiber laid in a substance from the scattered wave of pulsed laser light incident on the optical fiber, and analyze the distributions along the optical fiber of the pressure, temperature, and strain of the substance at the time of measurement using a coefficient that is unique to the laid optical fiber and associates the pressure, temperature, and strain of the substance with the Brillouin frequency shift and the Rayleigh frequency shift.