High-precision method for monitoring underground storage of carbon dioxide with tiltmeter

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In this study, to develop a high-precision method for monitoring underground flow of carbon dioxide stored at great depth with tiltmeter, firstly we clarified the dependence of the poroelastic constants on the effective confining pressure by using a triaxial testing system that was designed and constructed to reproduce the conditions up to a depth of 2,000 m. Next, performing a theoretical study on the inverse analysis of underground fluid flow in an ellipsoidal region, we proposed an inverse method for accurately determining the region of fluid flow from data containing large noises.