Experimental investigation on the application of carbon dioxide adsorption for a shale reservoir

New advancements in unconventional oil reservoirs to enhance cumulative oil production are essential for petroleum industries to develop new oilfields. Carbon dioxide injection (CO2) is considered one of the most functional enhanced oil recovery (EOR) methods, especially in shale reservoirs, regarding their low permeability of pores and cracks. This paper aims to experimentally investigate the crucial factors such as shale particle size, pressure, and temperature on the CO2 adsorption that can be used as a useful guideline for developing unconventional hydrocarbon reservoirs. Thereby, pressure increase would be an essential parameter to increase CO2 storage capacity; however, temperature increase has a reverse pattern and has caused to decrease the CO2 storage capacity. The essence of the oil recovery factor from shale reservoirs is another crucial factor that depends on the pressure, temperature, and soaking time factors. CO2 injection would be a proper (EOR) method to increase the oil recovery factor for higher pressures and temperatures. Therefore, the applicability of CO2 injection in shale reservoirs could provide efficient results rather than other EOR techniques.