Modeling experiments of fluid injection and the application of the inversion using the surface deformation

The authors had developed the inversion of the surface deformation and had estimated the subsurface volume change. The withdraw experiments in the field had been actually carried out and the subsurface volume had been calculated. Moreover, the coupled inversion of transient pressure observations and surface displacement measurements had been applied and the permeability distribution in a field had been estimated. In this research work, the modeling apparatus of the fluid injection is developed and the modeling experiments are carried out. In the experiments, the fluid is injected into the modeling ground under controlling the flux and the pressure. Then, the surface displacement, the earth pressure and the transient pressure can be measured continuously. Based on the obtained data, the inversion is carried out. Finally, as discussed the result, the validity of the inversion is discussed. And, the subsurface volume change and the distribution of the permeability are estimated.