Understanding CO2 storage in geological formations

Geological storage in saline aquifers and depleted oil and gas reservoirs can help mitigate CO2 emissions. However, CO2 leakage over a long period remains a major concern. Poorly cemented borehole and cement degradation after CO2 injection can provide pathways for CO2 leakage to groundwater and the atmosphere. Accordingly, it is critical to thoroughly understand the interactions between CO2-brine and cement-caprock/reservoir rock to assess the possible risk of CO2 leakage. In this work, we have performed a series of experiments simulating deep wellbore environments in order to investigate the alteration of chemical, physical and mechanical properties of cement and rock. This project is looking for a student to conduct the interpretation of micro CT, XRD, SEM-EDX and ICP-OES analysis to understand dissolution and precipitation of minerals and, as a result, cement and cement-caprock interactions. In addition, there is also the opportunity to conduct geochemical modelling of selected mineral reactions with CO2 dissolved in North Sea brine.

Supervisor name: 
Prof Mercedes Maroto-Valer
Supervisor and Deputy email addresses: 
M.Maroto-Valer@hw.ac.uk
a.jahanbakhsh@hw.ac.uk

Project Type:

Project location: 
RCCS lab in Coulson Building
Deputy name: 
Dr Amir Jahanbakhsh