10. Conclusion

The primary and secondary oil recovery produces about 20–40% of the OOIP [48]. Consequently, there is a huge amount of potentially unrecovered oil left in the reservoir, which becomes the target for suitable EOR processes. One of the widely implemented EOR processes is CO2-miscible flooding which recovers high amounts of crude oil and reduces environmental pollution results from gas emissions. CO2 can be injected either as a continuous stream, water-alternating gas (WAG). Implementation of successful CO2 miscible flooding require an accurate investigation of reservoir screening criteria comprising reservoir porosity and permeability, API gravity, oil viscosity, reservoir temperature, depth, oil saturation, and net pay thickness.

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