Real Time 3D Observations of Portland Cement Carbonation at CO₂ Storage Conditions.

ABSTRACT: Depleted oil reservoirs are considered a viable solution to the global challenge of CO₂ storage. A key concern is whether the wells can be suitably sealed with cement to hinder the escape of CO₂. Under reservoir conditions, CO₂ is in its supercritical state, and the high pressures and temperatures involved make real-time microscopic observations of cement degradation experimentally challenging. Here, we present an in situ 3D dynamic X-ray micro computed tomography (μ-CT) study of well cement carbonation at realistic reservoir stress, pore-pressure, and temperature conditions. The high-resolution time-lapse 3D images allow monitoring the progress of reaction fronts in Portland cement, including density changes, sample deformation, and mineral precipitation a

SUBMITTER: Chavez Panduro EA 

PROVIDER: S-EPMC7467647 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature