CO2 refracturing in shale: Experimental insights into fracture behavior and evolution mechanisms

Key Points

• Fracture behavior significantly changes during CO2 refracturing, leading to enhanced gas recovery.
• Key findings include altered permeability and stress distribution within 80% of observed fractures.
• Experimental insights were gathered through controlled lab tests that simulate field conditions.
• Findings highlight potential improvements in shale gas recovery techniques and emphasize the need for field validation.