Study on inorganic components in recirculated water from SZ36-1 Oilfield

Comprehensive analysis has been done on the components of filter membrane before and after combustion with X-ray diffractometer and SEM energy dispersive spectrometer in SZ36-1 Oilfield. Through analysis of the change rules of Fe and Ca, combined with on-site water quality monitoring data, it has been found that the water quality is worsen progressively from CEP to other plat forms in SZ36-1 oil field.In the process of water transportation from CEP to A platform, then to J plat form, the average percentage of Fe is 4.45%, 13.03% and 19.45%;the average percentage of Ca is 4.33%, 5.43% and 5.66%.The corrosion and scaling phenomenon has become serious, and is the main reason for the quality deterioration of injection water.