Mineral Filling Pattern in Complex Fracture System of Carbonate Reservoirs: Implications from Geochemical Modeling of Water-Rock Interaction

Table 1

Initial water chemical characteristic.

Water type	Average of pH	Chemical characteristic	Concentration/(Mol·kg^-1)	Chemical characteristic	Concentration/(Mol·kg^-1) /(Mol·kg^-1)
CaCl2-type	5.8	K^+	1.577 × 10^-4	Al^3+	3 + 6.490 × 10^-6
		N^a+	1.950 × 10^-2	SO2^4-	7.651 × 10^-11
		Ca^2+	9.270 × 10^-1	HCO^-	9.149 × 10^-3
		Mg^2+	2.170 × 10^-14	Cl^-	9.897 × 10^-1
		Fe^2+	3.015 × 10^-3	SiO2(aq)	1.378 × 10^-3