Experimental Study on Enhanced Oil Recovery by Nitrogen-Water Alternative Injection in Reservoir with Natural Fractures

Table 1

Core sequencing results in long core displacement experiment.

No.	Core no.	Diameter	Length	Porosity	Permeability	Oil saturation	Pore volume	Initial oil volume
		cm	cm	%	mD	%	mL	mL
1 (inlet)	C-1	2.502	4.812	9.626	0.759	58.15	2.28	1.32
2	C-2	2.502	5.517	9.536	1.152	58.84	2.59	1.52
3	C-3	2.501	5.451	11.342	0.807	64.79	3.04	1.97
4	C-4	2.505	4.985	9.558	0.700	67.00	2.35	1.57
5	C-5	2.502	5.057	8.712	1.193	63.83	2.17	1.38
6	C-6	2.505	4.956	8.759	0.954	60.51	2.14	1.29
7	C-7	2.505	5.334	9.104	0.901	67.59	2.39	1.62
8	C-8	2.504	4.965	9.465	0.775	66.35	2.31	1.54
9	C-9	2.504	4.934	10.934	1.048	63.36	2.66	1.68
10 (outlet)	C-10	2.503	5.067	9.317	0.943	66.02	2.32	1.53