Complexity Model for Predicting Oil Displacement by Imbibition after Fracturing in Tight-Oil Reservoirs

Table 1

Core parameters before and after fracturing.

Core numbers	Core lengths (cms)	Core diameters (cms)	Permeability (mD) before fracturing	Permeability (mD) after fracturing	Cracks open degree (μm)	Core crevice types
1	4.894	2.522	0.095	27.290	1.64	Single slit
2	5.477	2.49	0.079	0.137	0.09	Cross-seams
5	5.661	2.512	0.081	15.748	1.43	Cross-seams
7	5.234	2.511	0.041	18.523	1.82	Single slit
10	4.972	2.498	0.082	10.639	0.922	Cross-seams