Table 1.

Asphaltene deposition in oil reservoirs during gas injection.

Author	Type of gas	Fluid properties	Location	Results	References
Leontaritis et al.	CO2	Not mentioned	Little Creek, Mississippi	Asphaltene deposition during gas injection in the tubing	58
Leontaritis et al.	CO2	Bubble point pressure = 1250 psig. GOR = 850 Scf/bbl API Gravity = 28° API	southeastern Saskatchewan	Injection of carbon dioxide causes the deposition of asphaltene	59
Novosad and Costain	CO2	Asphaltenes = 5.5% (w/w), Wax = 10.45% (w/w) Others = 84.1 5% (w/w)	Ventura, California	The gas injection has caused the deposition of asphaltene	60
Negahban et al.	CO2 and hydrocarbon gas	API gravity = 39 ˚AP60I, GOR = 551 scf/bbl Asphaltenes = 0.94% (w/w) Saturates = 54.2% (w/w) Resins = 4.6% (w/w) Aromatics = 40.3% (w/w)	Abu Dhabi	Carbon dioxide injection did not affect asphaltene deposition but hydrocarbon injection increases asphaltene deposition	61
Gonzalez et al.	CO2, N2, CH4	Asphaltenes = 15.5% (w/w) Aromatics = 35.9% (w/w) Resins = 9.0% (w/w) Saturates = 39.2% (w/w)	Gulf of Mexico	The results showed that nitrogen, methane, and carbon dioxide had the greatest effect on asphaltene deposition, respectively	62
Rong-Tao et al.	CO2-WAG	Asphaltenes = 1.32% (w/w) Aromatics = 13.52% (w/w) Resins = 8.59% (w/w) Saturates = 63.78% (w/w)	Changqing	The results of this study showed that asphaltene deposition increases with an increased injection rate of water alternating gas	63