Hydrogen-induced calcite dissolution in Amaltheenton Formation claystones: Implications for underground hydrogen storage caprock integrity
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In: International Journal of Hydrogen Energy , Vol. 47.2022, No. 71, 19.08.2022, p. 30621-30626.
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TY - JOUR
T1 - Hydrogen-induced calcite dissolution in Amaltheenton Formation claystones
T2 - Implications for underground hydrogen storage caprock integrity
AU - Bensing, Joel P.
AU - Misch, David
AU - Skerbisch, Lukas
AU - Sachsenhofer, Reinhard F.
N1 - Publisher Copyright: © 2022 The Author(s)
PY - 2022/8/19
Y1 - 2022/8/19
N2 - With the rising potential of underground hydrogen storage (UHS) in depleted oil and gas reservoirs or deep saline aquifers, questions remain regarding changes to geological units due to interaction with injected hydrogen. Of particular importance is the integrity of potential caprocks/seals with respect to UHS. The results of this study show significant dissolution of calcite fossil fragments in claystone caprock proxies that were treated with a combination of hydrogen and 10 wt% NaCl brine. This is the first time it has been experimentally observed in claystones. The purpose of this short communication is to document the initial results that indicate the potential alteration of caprocks with injected hydrogen, and to further highlight the need for hydrogen-specific studies of caprocks in areas proposed for UHS.
AB - With the rising potential of underground hydrogen storage (UHS) in depleted oil and gas reservoirs or deep saline aquifers, questions remain regarding changes to geological units due to interaction with injected hydrogen. Of particular importance is the integrity of potential caprocks/seals with respect to UHS. The results of this study show significant dissolution of calcite fossil fragments in claystone caprock proxies that were treated with a combination of hydrogen and 10 wt% NaCl brine. This is the first time it has been experimentally observed in claystones. The purpose of this short communication is to document the initial results that indicate the potential alteration of caprocks with injected hydrogen, and to further highlight the need for hydrogen-specific studies of caprocks in areas proposed for UHS.
KW - Calcite dissolution
KW - Caprock integrity
KW - Hydrogen
KW - Underground hydrogen storage
UR - http://www.scopus.com/inward/record.url?scp=85135803973&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2022.07.023
DO - 10.1016/j.ijhydene.2022.07.023
M3 - Article
AN - SCOPUS:85135803973
VL - 47.2022
SP - 30621
EP - 30626
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
SN - 0360-3199
IS - 71
ER -
