When drilling a well it is important to choose a reasonable mud density to ensure safe operations. This is not a trivial task because a balanced mud-weight has a complex relation to the uncertain formation conditions and properties. The paper presents a method for conducting sensitivity analysis...

In carbon storage activities, and in shale oil and gas extraction (SOGE) with carbon dioxide (CO₂) stimulation fluid, CO₂ comes into contact with shale rock and its pore fluid. As a reactive fluid, the injected CO₂ displays a large potential to modify the shale’s chemical, physical, and...

CO₂ sequestration in aquifers or depleted oil and gas fields depends on good injectivity, which is not decreasing over time, to achieve the target storage capacity of the chosen reservoir. Depending on the mineral composition of the rock formation into which CO₂ is planned to be stored, dissolution...

Permanent CO₂ sequestration relies on avoiding leakage from the reservoir through the caprock. The highest leakage risk resides at the wells penetrating the reservoir, in particular at the boundary between cement sheath and formation. Models quantifying the risk of cement debonding require the...