油田注水系统腐蚀因素的分析

Corrosion Factors Analysis of Oilfield Water Injection System

方绍燕

FANG Shaoyan

油田注水系统管网的腐蚀是油田生产过程中一直难以有效解决的难题。引起腐蚀的因素有物理因素、化学因素和生物因素等。为了揭示油田污水诸多影响因素与腐蚀的相关性，本研究对胜利油田55 个不同的污水站污水理化性质进行全面系统的分析，并应用SPSS程序分析了污水中物理、化学和生物因素与腐蚀的相关性。结 果表明：污水矿化度（＜20 g/L）、溶解氧、悬浮物与腐蚀速率的相关系数分别为0.345、0.440、0.305，概率（P）分别为0.039、0.001、0.044，与腐蚀均呈显著正相关；pH值、温度与腐蚀速率的相关系数分别为0.127、0.185，P 分别为0.356、0.177，与腐蚀存在相关性，但影响有限；含油量与腐蚀速率的相关系数为-0.295，P为0.029，与腐蚀呈显著负相关。由于各水站都添加杀菌剂，导致细菌与腐蚀速率之间的相关性减弱。表2 参12

The corrosion of pipe network in oilfield water injection system was a problem which was difficult to solve effectively in oil production process. The corrosion was caused by many factors，including physical factors，chemical factors and biological factors. In order to reveal the correlation between corrosion factors and corrosion，the physical and chemical properties of sewage effluent of 55 different stations in Shengli oilfield were analyzed. The correlation between physical，chemical and biological factors in sewage and corrosion was analyzed by SPSS program. The results showed that the correlation index between salinity（﹤20 g/L）， dissolved oxygen，suspended solids and corrosion rate was 0.345，0.440，0.305，respectively，the probability（P）was 0.039，0.001，0.044，showing a significant positive to corrosion. The correlation index between pH value，temperature and corrosion rate was 0.127，0.185，respectively，the P was 0.356，0.177，showing a limited correlation to corrosion. The correlation index between oil content and corrosion rate was -0.295，the P was 0.029，showing a significantly negative correlation. The correlation between bacteria and corrosion rate was reduced for antiseptic injection.