Experimental Study on the Effect of Long-Term Water Injection on Micropore Structure of Ultralow Permeability Sandstone Reservoir

Table 2

Basic core information.

Cores	Length (cm)	Diameter (cm)	Permeability (mD)	Porosity (%)
C9-1	3.01	2.51	0.362	10.37
C9-2	3.04	2.51	0.365	10.42
C11-1	3.09	2.51	0.374	10.79
C11-2	3.07	2.51	0.378	10.84