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Carbon Capture, Utilization and Storage (CCUS) is an effective approach for achieving carbon emission reduction and enhancing oil recovery. In ultra-low permeability deep reservoirs, a comprehensive understanding of the migration behavior of injected CO₂ is crucial for characterizing reservoir response and identifying wellbore corrosion risks. This study takes the G66X1 Fault Block in an oilfield in Hebei Province as an example, constructing a high-precision 3D geological model integrating logging and structural interpretation data. Using Petrel and CMG-GEM, a three-year cycle of CO₂ injection and migration numerical simulation was conducted under high-temperature and high-pressure conditions. The results indicate that CO₂ preferentially migrates along structural highs and interlayer pathways, exhibiting heterogeneous accumulation characteristics. By extracting key parameters such as mole fraction, temperature, and pressure, the study preliminarily reveals a vertical evolution pattern of ‘‘mid-layer enrichment, higher corrosion risk in the upper layer, and weaker response in the bottom layer,’’ providing theoretical support for identifying high-risk areas near production wells.

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Simulation of CO₂ Migration in Deep Reservoirs Under CCUS Conditions

  • 会议论文

  • 发表日期：

    2026年

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  • Haopeng Li,
  • Ziyi Gao,
  • Huaizhu Liu,
  • Jinping Xiong,
  • Liangchao Chen

摘要

Carbon Capture, Utilization and Storage (CCUS) is an effective approach for achieving carbon emission reduction and enhancing oil recovery. In ultra-low permeability deep reservoirs, a comprehensive understanding of the migration behavior of injected CO₂ is crucial for characterizing reservoir response and identifying wellbore corrosion risks. This study takes the G66X1 Fault Block in an oilfield in Hebei Province as an example, constructing a high-precision 3D geological model integrating logging and structural interpretation data. Using Petrel and CMG-GEM, a three-year cycle of CO₂ injection and migration numerical simulation was conducted under high-temperature and high-pressure conditions. The results indicate that CO₂ preferentially migrates along structural highs and interlayer pathways, exhibiting heterogeneous accumulation characteristics. By extracting key parameters such as mole fraction, temperature, and pressure, the study preliminarily reveals a vertical evolution pattern of ‘‘mid-layer enrichment, higher corrosion risk in the upper layer, and weaker response in the bottom layer,’’ providing theoretical support for identifying high-risk areas near production wells.