Geochemical Integrity of Wellbore Cements during Geological Hydrogen Storage.

Increasing greenhouse gas emissions have put pressure on global economies to adopt strategies for climate-change mitigation. Large-scale geological hydrogen storage in salt caverns and porous rocks has the potential to achieve sustainable energy storage, contributing to the development of a low-carbon economy. During geological storage, hydrogen is injected and extracted through cemented and cased wells.

Influence of stearic acid and alumina nanofluid on CO wettability of calcite substrates: Implications for CO geological storage in carbonate reservoirs.

Hypothesis: Atmospheric CO emissions trigger global warming and climate change challenges. Thus, geological CO storage appears to be the most viable choice to mitigate CO emissions in the atmosphere. However, the adsorption capacity of reservoir rock in the presence of diverse geological conditions, including organic acids, temperature, and pressure, can cause reduced certainty for CO storage and injection problems.

Influence of Organic Acid Concentration on Wettability Alteration of Cap-Rock: Implications for CO Trapping/Storage.

Every year, millions of tons of CO are stored in CO-storage formations (deep saline aquifers) containing traces of organic acids including hexanoic acid C (HA), lauric acid C (LuA), stearic acid C (SA), and lignoceric acid C (LiA). The presence of these molecules in deep saline aquifers is well documented in the literature; however, their impact on the structural trapping capacity and thus on containment security is not yet understood. In this study, we therefore investigate as to how an increase in organic acid concentration can alter mica water wettability through an extensive set of experiments.