The aim of this project is to establish a series of best practice recommendations for monitoring and mitigating fluid leakage into the overlying sediments and boreholes. To accomplish this, it is crucial there is a good understanding of the mechanical processes occurring in the subsurface, which are dependent on the composition of the rock, the chemistry of the fluids, and the structures they encounter (e.g., faults). Through a linked series of work packages that integrate geology, geophysics, geochemistry, petroleum engineering and geomechanics, this project will be able to address fundamental scientific questions about the mechanisms for leakage, and how the leaking fluids might affect the sub-surface environment.