Experimental Research on Supercritical Carbon Dioxide Fracturing of Sedimentary Rock: A Critical Review
Bowen ZHENG
Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029 China
Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, 100029 China
College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100029 China
Search for more papers by this authorCorresponding Author
Shengwen QI
Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029 China
Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, 100029 China
College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100029 China
Corresponding author. E-mail: [email protected]Search for more papers by this authorWei LU
Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029 China
Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, 100029 China
College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100029 China
Search for more papers by this authorSongfeng GUO
Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029 China
Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, 100029 China
College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100029 China
Search for more papers by this authorZan WANG
Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029 China
Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, 100029 China
College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100029 China
Search for more papers by this authorXin YU
Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029 China
Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, 100029 China
College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100029 China
Search for more papers by this authorYan ZHANG
Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029 China
Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, 100029 China
College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100029 China
Search for more papers by this authorBowen ZHENG
Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029 China
Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, 100029 China
College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100029 China
Search for more papers by this authorCorresponding Author
Shengwen QI
Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029 China
Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, 100029 China
College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100029 China
Corresponding author. E-mail: [email protected]Search for more papers by this authorWei LU
Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029 China
Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, 100029 China
College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100029 China
Search for more papers by this authorSongfeng GUO
Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029 China
Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, 100029 China
College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100029 China
Search for more papers by this authorZan WANG
Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029 China
Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, 100029 China
College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100029 China
Search for more papers by this authorXin YU
Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029 China
Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, 100029 China
College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100029 China
Search for more papers by this authorYan ZHANG
Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029 China
Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, 100029 China
College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100029 China
Search for more papers by this authorAbout the first author:
ZHENG Bowen, male, born in 1987 in Laoting, Hebei Province, senior engineer at the Institute of Geology and Geophysics, Chinese Academy of Sciences in Beijing. His research interests focus on engineering geomechanics of rock mass and CO2 storage. E-mail: [email protected].
About the Corresponding author:
QI Shengwen, male, born in 1975 in Pengyang, Ningxia Province, professor at the Institute of Geology and Geophysics, Chinese Academy of Sciences in Beijing. His research interests focus on engineering geomechanics of rock mass and CO2 storage. E-mail: [email protected].
Abstract
Supercritical carbon dioxide (ScCO2) fracturing has great advantages and prospects in both shale gas exploitation and CO2 storage. This paper reviews current laboratory experimental methods and results for sedimentary rocks fractured by ScCO2. The breakdown pressure, fracture parameters, mineral composition, bedding plane angle and permeability are discussed. We also compare the differences between sedimentary rock and granite fractured by ScCO2, ultimately noting problems and suggesting solutions and strategies for the future. The analysis found that the breakdown pressure of ScCO2 was reduced 6.52%–52.31% compared with that of using water. ScCO2 tends to produce a complex fracture morphology with significantly higher permeability. When compared with water, the fracture aperture of ScCO2 was decreased by 4.10%–72.33%, the tortuosity of ScCO2 was increased by 5.41%–70.98% and the fractal dimension of ScCO2 was increased by 4.55%–8.41%. The breakdown pressure of sandstone is more sensitive to the nature of the fracturing fluid, but fracture aperture is less sensitive to fracturing fluid than for shale and coal. Compared with granite, the tortuosity of sedimentary rock is more sensitive to the fracturing fluid and the fracture fractal dimension is less sensitive to the fracturing fluid. Existing research shows that ScCO2 has the advantages of low breakdown pressure, good fracture creation and environmental protection. It is recommended that research be conducted in terms of sample terms, experimental conditions, effectiveness evaluation and theoretical derivation in order to promote the application of ScCO2 reformed reservoirs in the future.
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