Dissolution and Deformation Characteristics of Limestones Containing Different Calcite and Dolomite Content Induced by CO2‐Water‐Rock Interaction
To investigate the impacts of mineral composition on physical and mechanical properties of carbonate rocks, limestone specimens containing different contents in calcite and dolomite are selected to perform CO2‐water‐rock reaction experiments. The X‐ray Diffraction (XRD) and Nuclear Magnetic Resonanc...
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Published in | Acta geologica Sinica (Beijing) Vol. 97; no. 3; pp. 956 - 971 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Richmond
Wiley Subscription Services, Inc
01.06.2023
State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China University of Chinese Academy of Sciences,Beijing 100049,China |
Edition | English ed. |
Subjects | |
Online Access | Get full text |
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Summary: | To investigate the impacts of mineral composition on physical and mechanical properties of carbonate rocks, limestone specimens containing different contents in calcite and dolomite are selected to perform CO2‐water‐rock reaction experiments. The X‐ray Diffraction (XRD) and Nuclear Magnetic Resonance (NMR) are carried out to examine the change characteristics of mineral dissolution and pore structure after reaction. The core flooding experiments with Fiber Bragg gratings are implemented to examine the stress sensitivity of carbonate rocks. The results show that the limestones containing pure calcite are more susceptible to acid dissolution compared to limestone containing impure dolomite. The calcite content in pure limestone decreases as the reaction undergoes. The dissolution of dolomite leads to the formation of calcite in impure limestone. Calcite dissolution leads to the formation of macropore and flow channels in pure limestone, while the effects of impure dolomite in impure limestone results in mesopore formation. When confining pressure is lower than 12 MPa, pure limestones demonstrate higher strain sensitivity coefficients compared to impure limestone containing dolomite after reaction. When confining pressure exceeds 12 MPa, the strain sensitivity coefficients of both pure and impure limestones become almost equal. |
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Bibliography: | qli@whrsm.ac.cn 2 chenbowen940321@163.com LI Qi, male, born in 1972 in Qingzhou, Shandong Rrovince; research scientist in the State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, China, since 2010. He holds a B.Sc. of earth sciences (1995) and an M.Sc. of hydrogeology and engineering geology (1998) from the Nanjing University, China. In 2004, he received a Ph.D. degree in civil engineering from Ibaraki University, Japan. The focus of Prof. Li's research is to understand and use laboratory and numerical tools to design novel subsurface disposal processes and site monitoring systems on different temporal and spatial scales. E‐mail sequestrated in target reservoir. E‐mail About the corresponding author About the first author CHEN Bowen, male, born in 1994 in Fuzhou, Fujian Province; B.Eng. (2017) and M.Eng. (2020) of Geological Engineering from Fuzhou University, China. He is a doctoral candidate from Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, China. His current research interest is to understand the chemical reactions of supercritical CO . |
ISSN: | 1000-9515 1755-6724 |
DOI: | 10.1111/1755-6724.15051 |