Grey Relational Analysis on Influence Factors of Corrosion in Production System of Luliang Oilfield

Due to the serious corrosion environment, numerous influencing factors of corrosion and complicated corrosion mechanism in Luliang Oilfield, it is difficult to accurately establish a mathematics prediction model for its production system, The indoor weight-loss method was employed in the dynamic simulation experiment, Then, the corrosion rate was chosen as the main factors of corrosion, while 7 parameters such as content of Cl^-, HCO₃^-, Ca²⁺, Mg²⁺, SO₄^2- pH value in the produced fluid and environmental temperature of production system and so on were chosen as the sub-factors of corrosion, In order to determine the effect of those 7 sub-factors on the corrosion performance of N80 casing and #20 low-carbon steel used in gathering pipeline of Luliang Oilfield, the sequence of influence factors for those 7 sub-factors was analyzed using grey relational analysis method.Results demonstrated that the significant sequence of influence for those 7 sub-factors was environmental temperature and pH value of the produced fluid.