The main goal of BRINE is to develop an early warning system for expansion of CO2 and possible upward movement of saline groundwater and additionally to develop a coupled numeric model to identify the driving forces of saltwater migration in deep geological formations. The design of the integrated early warning systems includes electromagnetic methods with natural (MT) and controlled sources (CSEM) in concert with electrical tomography (ERT) measurements along observation wells and shallow electromagnetic profiling (EM) in critical regions. The magnetotelluric work package is focused on the regional scale resistivity distribution and on the detection of an expansion of the CO2 plume. Various scenarios of CO2 and salt migration are simulated using numerical methods. Numerical models are also developed to optimize design and geometry of transmitter (CSEM) and receiver (MT) positions for the integrated early warning system. In March 2012, 28 MT sites were collected along a 40-km long profile in the Beeskow area in northeast Germany. The regional scale electrical resistivity models obtained from the measurements were used to calibrate the simulation results of both the MT and ERT work packages.
Methods & Equipment