DC5-PhD: Reducing the uncertainty on subsurface heterogeneity from microseismic and geodetic data

This project aims to reduce the risk of inducing felt seismic events during the geo-energy projects, by developing a precise framework, using coupled thermos-hydro-mechanical-chemical (THMC) simulations and analytical solutions to characterize the subsurface structures, to update the knowledge of the subsurface in quasi-real-time. The developed characterization methodology will be tested by using microseismic and ground deformation data of the CO2 injection.

Objectives: Develop a THMC characterization methodology to reduce the uncertainty on subsurface heterogeneity and identify faults that might induce seismicity based on induced microseismicity and ground deformation measurements

Expected Results: An information and computing framework that integrates geodetic, pressure, temperature and geochemical measurements with coupled THMC simulations will be developed to continuously characterize the subsurface during operation of geo-energy projects. Anomalous surface deformation patterns will serve to identify the presence and characteristics of geologic structures, like conductive and low-permeable faults. By developing a precise workflow that permits a continuous characterization in quasi-real-time, the knowledge on the subsurface can be updated, providing valuable information to the decision makers of geo-energy projects in order to operate the sites minimizing the risk of inducing felt seismic events. The developed characterization methodology will be tested using microseismic and ground deformation data of the CO2 injection at Decatur, Illinois and the CL-Experiment at Mont Terri. The DC will collaborate with DCs 2 and 10 on the ground deformation measurements, with DC 11 on evaluation of rock properties, with DC 7 on subsurface deformation induced by fault reactivation and with DC 3 on designing passive microseismic monitoring networks to assess changes in caprock sealing capacity.

Doctoral Candidate: Tian Guo

Host Institution: CSIC (Spain) 

Secondments: ETHZ, GReD, Seismik