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Yu Hui, . Simulation of CO2 injection into sandstone lens sealing based on 2D crack expansion[J]. Journal of Mining Science and Technology, 2020, 5(6): 601-607. doi: 10.19606/j.cnki.jmst.2020.06.001
Citation: Yu Hui, . Simulation of CO2 injection into sandstone lens sealing based on 2D crack expansion[J]. Journal of Mining Science and Technology, 2020, 5(6): 601-607. doi: 10.19606/j.cnki.jmst.2020.06.001
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Simulation of CO2 injection into sandstone lens sealing based on 2D crack expansion

doi: 10.19606/j.cnki.jmst.2020.06.001

  • 1College of Geoscience and Surveying Engineering,China University of Mining & TechnologyBeijing,Beijing 100083,China;2National Engineering Research Center of Coal Mine Water Hazard Controlling,Beijing 100083,China;3Key Laboratory of Shale Gas and Geoengineering,Institute of Geology and Geophysics

  • Publish Date: 2020-12-31
    Abstract
  • To ensure the safety of supercritical carbon dioxide storage in sandstone lens bodies，the initiation，propagation and evolution of cracks were studiedA lenticular geological model and a numerical calculation model were established to analyze the transport mechanism of supercritical carbon dioxide fluid in fracturesABAQUS numerical simulation software was used to establish a fluidsolid coupling model for fracture propagation simulationThe results show that when there are initial cracks，the cracks appear to be long，fast，and curved，and when there are no initial cracks，the cracks appear to be short，slow，and flatIn the case of 0° and 30° initial fracture angle，the change of fracture width and area with pore water pressure is similar，showing a linear increasing trend as a whole；in the case of 60° initial fracture angle，the change of fracture expansion is complex，which mainly depends on the selection of initial injection point and migration channel in injection fractureThe results of the study should be paid attention to in the selection of carbon dioxide storage sites
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