Effect of Microscopic Pore Throat Structure on Displacement Characteristics of Lacustrine Low Permeability Sandstone: A Case Study of Chang 6 Reservoir in Wuqi Oilfield, Ordos Basin

Table 4

Microscopic displacement model of real sandstone test parameters.

Type	Well	Depth (m)	Displacement type	Average oil displacement efficiency (%)	Displacement multiple
					1PV	2PV		3PV
					Oil displacement efficiency (%)	Oil displacement efficiency (%)	Displacement efficiency increment (%)	Oil displacement efficiency (%)	Displacement efficiency increment (%)
I	X26	1880.50	Uniform displacement	41.88	33.49	40.93	7.44	46.51	5.58
	X39	1884.57			28.96	33.85	4.89	37.25	3.40
II	X9	1829.87	Mesh displacement	37.16	33.17	39.02	5.85	40.98	1.95
	X19	1784.71			20.00	30.00	10.00	33.33	3.33
III	X27	1823.20	Finger displacement	30.00	17.78	29.63	11.85	35.56	5.93
	X28	1910.85			13.33	22.22	8.89	24.44	2.22