The thermal properties of set Portland cements – a literature review in the context of CO2 injection well integrity

Depleted hydrocarbon reservoirs are a promising target for CO2 sequestration. Injection of cold into such geological will cause thermal stresses and strains in wellbore casings, cement seals surrounding rock, which may lead to the creation unwanted pathways seepage. Joule-Thomson effects could potentially produce freezing conditions. The design injector wells must be able cope with these loads. While numerical modelling can used develop our understanding assess impact processes on integrity, analyses require reliable input data material properties, as those seals. This critical review provides an overview existing lab measurements theoretical considerations help constrain behaviour Portland under relevant subsurface Special attention is given i) conductivity, ii) specific heat capacity, iii) coefficient expansion. Influences properties factors a) temperature, b) pressure, c) mixing water-to-cement ratio, d) extent hydration, e) porosity, f) pore fluid saturation discussed. Our has shown that datasets obtained downhole conditions limited, constraining assessment integrity.