Experimental investigation on the mechanism of low permeability natural gas extraction accompanied by carbon dioxide sequestration

Application and Research Progress of CO2 Stimulation Technology in Unconventional Oil and Gas Reservoirs: A Review and Prospect

“…Meanwhile, its adsorption energy is about 1.5 times that of CH 4 , which indicates that it can be adsorbed and stored by reservoirs. Liu et al 99 studied its adsorption in the core of lowpermeability sandstone gas formation. They found that its saturated adsorption capacity is twice that of CH 4 , which indicates that the low-permeability sandstone gas reservoir has the potential to store CO 2 .…”

“…Adsorption storage is mainly determined by physical adsorption by formation. Meanwhile, heat is set free when it is in contact with the surface of coal or shale. , CO 2 displaces other hydrocarbons in the shale because the shale is more absorbent to CO 2 than the other hydrocarbons. , Similarly, CO 2 will also form competitive adsorption with methane (CH 4 ) in the coal seam, thereby replacing CH 4 , at 2–8 m 3 of CO 2 with 1 m 3 of CH 4 under different conditions . In addition, Alafnan found that asphaltenes also have the ability to adsorb and store CO 2 .…”

“…Thus, there is an urgent need for technologies that can effectively reduce greenhouse gas emissions. 62,99,100 CO 2 is inevitable. It is a major effective way to avoid climate change.…”

“…104,105 Similarly, CO 2 will also form competitive adsorption with methane (CH 4 ) in the coal seam, thereby replacing CH 4 , at 2−8 m 3 of CO 2 with 1 m 3 of CH 4 under different conditions. 99 In addition, Alafnan 120 found that asphaltenes also have the ability to adsorb and store CO 2 .…”

“…It has important significance for achieving the clean utilization of fossil energy in China. Thus, there is an urgent need for technologies that can effectively reduce greenhouse gas emissions. ,, CO 2 is inevitable. It is a major effective way to avoid climate change.…”