Clay‐rich shale poses substantial challenges to establishing well integrity during drilling, operation and abandonment of wells used in oil and gas production, CO₂ sequestration, and other waste disposal activities. We review problems created by shale for borehole stability, zonal isolation, and lon...

In this study, a new approach for detailed tracking of the interface between well fluid and cement by using particles is investigated. This can improve the quality of annular cementing of CO₂ wells and thus the storage safety. For this purpose, the displacement mechanisms of Newtonian and non-Newton...

Injection of CO₂ into saline storage aquifers is often accompanied by drying of the formation water and salt precipitation. Subsequent salt clogging of a well bore and the near wellbore rock matrix may lead to injectivity impairment. In this paper we present medium-scale experiments on salt precipit...