Electrical Resistivity Measures in Cohesive Soils for the Simulation of an Integrated Energy System Between CCS and Low‐Enthalpy Geothermal

This work has focused on the possibility of being able to consider the behavior of the caprock, such as a layer of cohesive soil that absorbs and transfers the displacement due to the expansion of the aquifer subject to the action of the flow of CO2 at high pressure, but lower than the overburden of the geological formations overlying the caprock. Assuming a caprock saturated unconfined laterally, which drains over time overpressure neutral interstitial fluid present in the matrix of cohesive soils, it has been calculated at the rate derived from the elastic yielding of consolidation theory and compared this value with the one obtained by applying a coefficient of consolidation built on the theory of the “double layer”. This theory also known as the Gouy-Chapman (1910) was applied to the prediction of the behavior of cohesive soils where it conducted a micro-mechanistic approach. From the design point of view, the second part of the study simulate the possibility of combining in a single integrated system, the injection of CO2 in deep saline aquifers to generate a range of pressures that facilitates the upgrade of geothermal fluids from geological formations that constitute the caprock or any porous aquifers overlaid with the aquifer reservoir. The uptake of these fluids promotes dissipate excess pressure and at the same time the settlement of primary consolidation of the formations overlying the aquifer subjected to the vertical elastic displacement. Preserves itself, in this way, the balance of the system and shows how the CCS can have a double purpose: on the one hand reduce the emission of CO2 into the atmosphere, and the other end to provide a energy contribution with the exploitation of a source of renewable energy.