油田采出水系统腐蚀试验研究

通过对陇东油田采出水水质的分析，确定出CO2、硫酸盐还原菌(SRB)、矿化度是造成采出水系统腐蚀的三个主要因素，并针对上述因素进行了静态和动态实验研究．实验结果表明．SRB的存在加速了腐蚀过程，腐蚀速率提高2倍以上．是影响腐蚀的最主要因素．CO2对腐蚀的影响也很显著，随CO2浓度提高腐蚀速率加快，CO2的腐蚀过程可用Dewaard模型来预测．矿化度大于2．5g／L时，随矿化度增大腐蚀速率线性提高；结合腐蚀产物表面形貌和组成的电镜扫描分析．进一步明确了腐蚀成因．

Experimental study on the erosion factors of the oily wastewater system in Longdong Oil Field

Carbon dioxide, sulfate-reducing bacteria (SRB) and mineralization are the three main factors ascertained affecting corrosion by the analysis on the wastewater quality of Longdong Oil Field. Static and dynamic experiments are designed to study the effects of the three main factors on the system erosion. Experimental results show that SRB, which is the most important factor influencing erosion of the system, accelerates the erosion process. Carbon dioxide also greatly affects the erosion and the corrosion rate will increase with the concentration of carbon dioxide. The results also verified that the De waard model could be used to predict the corrosion rate of the CO_(2) corrosion in Longdong Oil Field. The corrosion rate correspondingly rise with the increase of the degree of mineralization. At the same time, the configuration and component of the erosion products on the metal surface are analyzed to confirm the cause of the erosion.