Investigating CO2-enhanced oil recovery potential for a mature oil field: a case study based on Ankleshwar oil field, Cambay Basin, India

Perspectives of CO2 Injection Strategies for Enhanced Oil Recovery and Storage in Indian Oilfields

“…Estimated MMP at reservoir conditions (a) before introducing the new injection fluid and (b) after introducing the new injection fluid composition (40% mole volume of CO 2 , 10% methane, 20% ethane, 20% propane, and 10% butane). This figure was reproduced with permission from ref . Copyright 2017 Springer Nature.…”

“…Quantitative estimation of the CO 2 EOR potential for the Ankleshwar oilfield in the Cambay Basin, India. This figure was reproduced with permission from ref . Copyright 2017 Springer Nature.…”

“…Although the temperature effects are quite complex, they can be disregarded when choosing a storage site. 81 Ganguli et al 82 investigated the incremental oil recovery in the Ankleshwar oilfield, which is situated in the Cambay Basin, India, by CO 2 EOR. Cylindrical Berea sandstone samples with crude oil from Ankleshwar were considered for the lab experiments.…”

“…These relative permeability curves are presented in Figure 11. 82 CO 2 injection yielded an incremental oil recovery of approximately 11.8% of the hydrocarbon pore volume (HCPV) compared to waterflooding. This value is significantly higher than that achieved using N 2 or other inert gas injection methods.…”

“…MMP is around 134 bar, and at that pressure, the oil in the Ankleshwar field is not miscible with CO 2 (shown in Figure 12); therefore, it can be reduced to 93 bar by developing a new injection fluid composition. 82,83 To gain a comprehensive understanding of reservoir behavior prior to full-scale simulations, sensitivity analysis was conducted on various reservoir parameters. The numerical model underwent a simulated waterflooding period of approximately 50 years, followed by a continuous gas injection phase lasting 30 years.…”