Asphaltene Deposition during CO₂ Flooding in Ultralow Permeability Reservoirs: A Case Study from Changqing Oil Field

Table 4

Core parameters and studied pressures and temperatures.

Order	Core length	Core diameter	Core pore volume	Core permeability	Pressure	Temperature	Formation water salinity	Asphaltene content
	(mm)	(mm)	(cm^3)	(mD)	(MPa)	(°C)	(mg/l)	(%)
1	66.37	25.2	3.712	0.1683	10	50	92455	0.93
2	70.12	25.2	3.553	0.1802	13	50	92455	0.93
3	70.05	25.22	4.434	0.2294	15	50	92455	0.93
4	69.87	25.2	3.652	0.2795	20	50	92455	0.93
5	67.83	25.2	4.62	0.3246	15	30	92455	0.93
6	68.95	25.2	3.532	0.3459	15	70	92455	0.93
7	68.92	25.24	3.215	0.4121	15	90	92455	0.93
8	68.23	25.21	3.429	0.257	15	50	92455	0.43
9	73.2	25.24	3.723	0.4754	15	50	92455	1.32