通过井下多臂井径仪（MIT）检测了解文昌油田井筒的腐蚀概况，利用高温高压反应釜进行了模拟试验，研究了井筒的腐蚀规律。结果表明：井筒在上部位置和中下部位置腐蚀较为严重；随着温度的升高，1Cr试样的腐蚀速率先增大后减小，在75 ℃时腐蚀最严重；腐蚀介质流速越大试样的腐蚀速率越大；随着二氧化碳分压的增加，试样的腐蚀速率增大，腐蚀由全面腐蚀转变为局部腐蚀，腐蚀坑也变大变深，并且有黑色腐蚀产物附着；1Cr试样和13Cr试样发生电偶腐蚀时，1Cr试样表面发生明显的局部腐蚀，腐蚀速率高于13Cr试样的。

Through underground MIT test, the corrosion profile of the wellbore in Wenchang oilfield was studied. A simulation experiment was carried out using a high temperature and high pressure autoclave to study the corrosion law of the wellbore. The results show that the corrosion of the wellbore in the upper position and lower part was more serious. With the increase of temperature, the corrosion rate of the 1Cr sample increased first and then decreased, and the corrosion was the most serious at 75 ℃. The greater the flow rate of the corrosive medium, the greater the corrosion rate of the sample. As the partial pressure of carbon dioxide increased, the corrosion rate of the sample increased, the corrosion changed from general corrosion to localized corrosion, the corrosion pit became larger and deeper, and black corrosion products adhered. When galvanic corrosion occurred in the 1Cr and 13Cr samples, significant localized corrosion occurred on the surface of the 1Cr sample, and the corrosion rate was higher than that of the 13Cr sample.