APPLYING GREY CORRELATION THEORY TO ANALYZE SEWAGE CORROSION FACTORS OF TAHE OILFIELD

Oilfield sewage is the main reason why production system corrosion occurs in an oilfield combination station. It′s difficult to use conventional treatment on sewage corrosivity analysis because of numerous effective factors, complex relationships and no certain mapping relation among those factors. This paper applies grey correlation method to analyze correlative degree of all the factors which effect on sewage corrosivity, and then obtains the correlative degree sequence. It illustrates that the main effective factors of sewage corrosivity in NO.2 combination station of Tahe Oilfield are total salinity, pH value, Cl-, Ca2+, HCO-3 and TGB contents. Grey correlation is an effective integrated method for analyzing oilfield sewage corrosion.