Study on Competitive Adsorption and Displacing Properties of CO₂ Enhanced Shale Gas Recovery: Advances and Challenges

Figure 1

(a) Schematic diagram of CO₂ enhanced shale gas recovery; (b) schematic diagram of CO₂ displacing/replacing CH₄ in shale during CO₂ fracturing for enhanced shale gas recovery [12].

(a)

(b)