Laboratory Study on Corrosion Mechanism of Production System in In Situ Combustion

Table 1

Analysis results of gas/liquid samples in the production system.

Gas samples		Water samples
Analysis items	Production wells	Analysis items	Production wells
O2 (%)	1.24	pH	7.4
CO (%)	0.03	Mg^2+	24.3
CO2 (%)	19.40	Ca^2+	8.4
N2 (%)	72.20	Fe^2+, Fe ^3+	0.02
Calorific value (kcal/m^3)	988	Na^+, K^+	518.2
Density (kg/m^3)	1.3912	Cl^-	506.0
H2S (ppm)	29	SO4^2-	1.5
SO2 (ppm)	0.0	HCO3^-	542.9
		SiO2	17.5