含CO2气井井筒腐蚀速率预测模型  

PREDICTION MODEL FOR CORROSION RATE OF GAS WELLBORE WITH CO2

作　　者：贺海军[1,2] 高纯良[2] 石磊[3] 

机构地区：[1]成都理工大学能源学院,四川成都610059 [2]大庆油田有限责任公司采油工程研究院,黑龙江大庆163453 [3]大庆油田有限责任公司,黑龙江大庆163453

出　　处：《大庆石油地质与开发》2011年第2期136-139,共4页Petroleum Geology & Oilfield Development in Daqing

摘　　要：为研究徐深气田气井管柱的腐蚀环境，探讨了CO2分压、温度、pH、流速等因素对普通碳钢的影响。利用灰色理论研究得出各种腐蚀因素的影响程度由大到小依次为CO2分压、温度、流速、pH、Cl-、HCO3-。基于室内实验和灰色理论研究结果，用多元线性回归数学方法建立普通碳钢CO2腐蚀速率预测模型，经过腐蚀监测和某井的实例验证了CO2腐蚀速率预测模型在徐深气田的适应性。CO2腐蚀速率预测模型的建立，对徐深气田管柱CO2腐蚀速率预测、寿命预测、腐蚀防护具有指导意义。To study the corrosion environment of wellbore in Xushen gas field, influence of CO2 fractional pressure, temperature, pH, velocity on carbon steel is discussed. Through gray theory, corrosion factors are arranged in order of impact： CO2 fractional pressure, temperature, velocity, pH, C1- , and HCO3- Based on laboratory experiment and gray theory, prediction model for CO2 corrosion rate on normal carbon steel is established with multiple linear regression method. Adaptability of prediction model of CO2 corrosion rate in Xushen gas field is verified by corrosion monitoring and well application case. The model is meaningful for CO2 corrosion rate prediction, life prediction and corrosion prevention in Xushen gas field.

关 键 词：CO2腐蚀 影响因素 预测模型 腐蚀速率 多元线性回归 

分 类 号：TE375[石油与天然气工程—油气田开发工程]