Investigation of CO₂ Enhanced Oil Recovery Using Dimensionless Groups in Wettability Modified Chalk and Sandstone Rocks

Table 1

Core descriptions of immiscible and miscible CO₂ flooding experiments.

EXP. number	𝑆wi	Phi	𝐾 (cm^2)	𝐿 (cm)	𝑞 (cc/min)	Type	Core
1a	0.22	0.23	6.5𝐸−09	6	0.2	Immiscible	Aged sandstone
2a	0.2	0.24	7.5𝐸−09	5.5	0.5	Immiscible	Aged sandstone
3a	0.25	0.25	7.3𝐸−09	5.8	2	Immiscible	Aged sandstone
4a	0.2	0.25	8.3𝐸−09	6.2	6	Immiscible	Aged sandstone
5a	0.25	0.23	6.7𝐸−09	6	8	Immiscible	Aged sandstone
5a*	0.21	0.22	6𝐸−09	5.5	8	Immiscible	Aged sandstone
5a**	0.22	0.24	7.6𝐸−09	6	8	Immiscible	Aged sandstone
1b	0.2	0.23	1.5𝐸−08	6	0.5	Immiscible	Aged sandstone
2b	0.25	0.24	1.6𝐸−08	5.5	2	Immiscible	Aged sandstone
3b	0.22	0.24	1.7𝐸−08	5.5	8	Immiscible	Aged sandstone
4b	0.25	0.25	1.7𝐸−08	5.8	10	Immiscible	Aged sandstone
1c	0.14	0.44	5𝐸−11	6	0.2	Immiscible	Aged chalk
2c	0.15	0.45	3.5𝐸−11	6.5	0.5	Immiscible	Aged chalk
3c	0.12	0.48	6𝐸−11	6.7	2	Immiscible	Aged chalk
4c	0.13	0.47	5.5𝐸−11	5.8	2.5	Immiscible	Aged chalk
5c	0.1	0.48	6.5𝐸−11	5.9	3.5	Immiscible	Aged chalk
5c*	0.13	0.45	6.2𝐸−11	6.5	3.5	Immiscible	Aged chalk
5c**	0.15	0.47	6𝐸−11	6	3.5	Immiscible	Aged chalk
1d	0.17	0.44	5.5𝐸−11	6	0.01	Immiscible	Aged chalk
2d	0.15	0.45	4𝐸−11	6.5	0.05	Immiscible	Aged chalk
3d	0.11	0.48	2𝐸−11	6.7	0.1	Immiscible	Aged chalk
1e^#	0.16	0.45	6.5𝐸−11	6	0.05	Miscible	Aged chalk
2e^#	0.14	0.46	4𝐸−11	6.5	0.05	Miscible	Aged chalk
3e^#	0.12	0.48	2.5𝐸−11	6.8	0.05	Miscible	Aged chalk
1e	0.27	0.25	6.5𝐸−09	6	0.05	Miscible	Unaged sandstone
2e	0.3	0.23	7.7𝐸−09	6.5	0.05	Miscible	Unaged sandstone
3e	0.125	0.22	8.2𝐸−09	6.8	0.05	Miscible	Unaged sandstone
1g	0.22	0.23	1.8𝐸−08	6	0.5	Immiscible	Unaged sandstone
2g	0.23	0.26	1.9𝐸−08	5.5	2	Immiscible	Unaged sandstone
3g	0.24	0.3	2.1𝐸−08	5.5	8	Immiscible	Unaged sandstone
4g	0.24	0.25	1.8𝐸−08	5.8	10	Immiscible	Unaged sandstone
1h	0.14	0.44	5.5𝐸−11	6	0.05	Miscible	Unaged chalk
2h	0.15	0.45	5.5𝐸−11	6.5	0.05	Miscible	Unaged chalk
3h	0.17	0.47	6𝐸−11	6.8	0.05	Miscible	Unaged chalk

∗Repetition of experiment (first time).
**Repetition of experiments (second times).
#Previously reported in Hamouda, A.A., Alipour Tabrizy, V., 2013, the effect of light gas on miscible CO₂ flooding to enhance oil recovery from sandstone and chalk reservoir, and journal of Petroleum Science and Engineering, volume 108, pages 259–266.