Study on Micropore Throat Fluid Seepage Characteristics and Oil Displacement Efficiency in Tight Reservoir

Table 1

Pore structure parameters and displacement path of sandstone.

Well name	Porosity (%)	Permeability (×10^-3 μm^2)	Oil displacement efficiency (%)	Displacement path
C146	9.23	0.4001	37.28	Finger-reticular displacement
C335	9.19	0.3441	40.4	Finger-reticular displacement
L27	12.42	2.1355	63.07	Uniform displacement
C250	10.56	0.4771	32.75	Finger displacement
C57	9.1	0.4023	41.22	Reticular displacement
C95	10.76	0.6566	43.16	Reticular displacement
X29	8.14	0.5652	38.26	Finger-reticular displacement
J71	9.87	1.7737	58.33	Uniform displacement
Y179	13.43	0.6903	37.54	Reticular displacement
Y263	5.22	0.3891	24.28	Finger displacement
J116	11.17	1.2337	37.75	Uniform displacement
J43	11.73	1.0385	38.2	Reticular displacement
Y245	9.37	0.3966	38.61	Reticular displacement
J68	7.72	1.0447	44.67	Finger-reticular displacement