Induced geochemical reactions by compressed air energy storage in a porous formation in the North German Basin

Critical Knowledge Gaps for Understanding Water–Rock–Working Phase Interactions for Compressed Energy Storage in Porous Formations

“…Sulfate- and iron-reducing bacteria may also largely contribute to the overall geochemical evolution of the system. , In regard to redox reactions, Whims found introduction of air at the Pittsfield compressed air energy storage experiment would result in the transformation of pyrite to hematite or ferrous sulfate on the order of months. Simulations of air injection in the North German basin similarly observed oxidation of pyrite and a significant reduction in pH that led to calcite and dolomite dissolution . Similar observations have also been made for the case for O 2 containing CO 2 in the context of geologic CO 2 sequestration …”

“…Simulations of air injection in the North German basin similarly observed oxidation of pyrite and a significant reduction in pH that led to calcite and dolomite dissolution. 98 Similar observations have also been made for the case for O 2 containing CO 2 in the context of geologic CO 2 sequestration. 101 Where geochemical reactions occur, the impact on porosity and permeability matters.…”

“…97 The time frame of geochemical reactions, and therefore implications for storage systems, however, is difficult to predict due to the lack of available kinetic data for mineral reactions in the presence of hydrogen 10 and lack of understanding of mineral reactive surface areas that can result in orders of magnitude variation in simulated mineral reaction rates. 83,84 Microbial and redox reactions, resulting from changes in the oxidation state due to the introduction of oxygen, 8,98 may also be important. In particular, microbial reactions may be significant in hydrogen systems where hydrogen is a universal electron donor for many bacteria and archaea.…”

“…Microbial and redox reactions, resulting from changes in the oxidation state due to the introduction of oxygen, , may also be important. In particular, microbial reactions may be significant in hydrogen systems where hydrogen is a universal electron donor for many bacteria and archaea .…”

Assessment of the oxygen reactivity in a gas storage facility by multiphase reactive transport modeling of field data for air injection into a sandstone reservoir in the Paris Basin, France

“…However, the experience in storage of these new gas mixtures is limited compared to the rich history of the natural gas industry. Gas injection, or more precisely the injection of dioxygen gas O 2 (g), into a deep aquifer reservoir might induce a chain of complex biogeochemical reactions with a potential impact on groundwater resources, and also cause severe technical issues such as metallic corrosion in wellbores or rock-formation damages (Bui et al, 1990;Muschalle and Amro, 2013;Wang and Bauer, 2019;Guo et al, 2021).…”