Crude oil mobility and its controlling factors in tight sand reservoirs in northern Songliao Basin, East China

FENG Jun,ZHANG Bowei,FENG Zihui,WANG Yachun,ZHANG Juhe,FU Xiaofei,SUN Yonghe,HUO Qiuli,SHAO Hongmei,ZENG Huasen,QU Bin,CHI Huanyuan

Table 2 Data of supercritical CO₂ displacement and extraction experiments on tight reservoir samples.

No.	Well	Lithology	Depth/m	Oil layer	Sedimentary facies	Poro- sity/ %	Permeability/ 10^-3 μm²	Average pore throat radius/nm	Injected oil volume/mL	Maximum injecting and displacing pressure/MPa	Effective pore volume/mL	Oil-bearing grade	Oil saturation/%	Movable oil content/ (mg·g^-1)	Retained oil content/ (mg·g^-1)	Movable oil rate/%
13	GU616	Siltstone	1 930.65	Fuyu	Inner delta- front	9.2	0.69	198	0.86	36	1.223 9	Oil containing	70.27	13.27	9.49	58.30
14	GU616	Siltstone	1 943.99	Fuyu		11.1	0.96	201	0.57	36	1.478 7	Oil containing	38.55	8.81	6.26	58.48
15	Jin341	Siltstone	2 098.17	Gaotaizi		10.7	0.82	204	0.32	39	1.397 0	Oil immersed	22.91	4.55	4.01	53.15
16	Jin28	Siltstone	2 224.76	Gaotaizi		11.4	0.12	100	0.33	42	1.516 6	Oil immersed	21.76	4.32	4.36	49.77
17	TX15	Siltstone	1 968.17	Fuyu		12.2	0.55	181	0.41	37	1.583 9	Oil immersed	25.88	5.93	5.29	52.85
18	Gu616	Siltstone	1 930.36	Fuyu		10.1	0.52	178	0.37	36	1.316 2	Oil immersed	28.11	5.78	5.35	51.93
19	Gu616	Siltstone	1 943.26	Fuyu		8.9	0.29	171	0.36	36	1.160 3	Oil immersed	31.03	5.11	4.97	50.69
20	Jin34	Siltstone	2 169.00	Gaotaizi		10.0	0.14	159	0.13	40	1.352 2	Oil trace	9.61	1.40	2.00	41.64
21	Gu616	Siltstone	1 953.75	Fuyu	Outer delta- front	8.0	0.06	77	0.57	36	1.083 8	Oil containing	52.59	4.50	9.15	32.95
22	TX15	Siltstone	1 974.66	Fuyu	Outer delta- front	7.5	0.07	57	0.30	37	1.016 6	Oil patch	29.51	1.53	6.26	19.64
23	Jin34	Mud-bearing siltstone	2 180.50	Gaotaizi	Inner delta- front	5.2	0.04	45	0.22	41	0.730 9	Oil patch	30.10	0.28	5.11	5.22
24	Gu616	Mud-bearing siltstone	1 950.33	Fuyu	Outer delta- front	8.0	0.05	55	0.20	36	1.082 5	Oil patch	18.48	0.84	4.37	16.12
25	TX15	Siltstone	1 974.89	Fuyu	Outer delta- front	7.0	0.05	81	0.41	37	0.949 3	Oil patch	22.12	0.09	5.32	1.65
26	Jin341	Mud-bearing siltstone	2 275.00	Fuyu	Inner delta- front	7.9	0.08	137	0.11	42	1.122 7	Oil trace	9.80	0.76	2.22	25.60
27	Gu616	Argillaceous siltstone	1 916.75	Fuyu	Outer delta- front	6.0	0.03	41	0.13	36	0.794 0	Oil trace	17.02	0.02	3.22	0.62
28	Gu616	Calcium- bearing siltstone	1 894.65	Fuyu		3.9	0.02	18	0.21	35	0.686 5	Oil patch	30.59	0	5.31	0
29	Gu616	Calcium- bearing siltstone	1 894.75	Fuyu		3.7	0.01	17	0.13	35	0.651 4	Oil trace	19.96	0	3.21	0