Influence of Migration and Plugging of Nanoparticles on Coal Permeability in Coal Reservoirs

Table 3

Basic features of the working fluids.

Fluid number	Fluid type	Density (g/cm^3)	Apparent viscosity (mPa·s)	pH
1	Distilled water	1.00	1.00	6.5
2	1% KCl	1.00	1.00	7.0
	3% KCl	1.03	1.03
	5% KCl	1.04	1.10
3	0.1% DPC		3.30
	0.3% DPC	1.04	8.50	7.6
	0.5% DPC		17.00