The corrosion problem of a production system has been affecting the normal operation of an in situ combustion project. Because the environment of production system is significantly different in tubing, gas, liquid, and temperature in in situ combustion, the problem of the corrosion should be treated differently according to its origin. Based on the main environment of gas-liquid of the production system of in situ combustion, the corrosion of steel in N80 and J95, which are commonly used in oilfield, is studied in different temperature and pressure conditions. The results show that under the condition of 50°C and 3 MPa, the corrosion of the well is the most serious. Based on the analysis of corrosion causes in the production system, the corrosion under the protection of modified sacrificial anode in the liquid phase environment was studied. The results of comparative analysis show that the modified material had the dual protection effect of sacrificial anode and film-forming protection and could slow down the corrosion in different temperature ranges.

中文翻译：

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原位燃烧生产系统腐蚀机理的实验室研究

生产系统的腐蚀问题一直影响着原地燃烧项目的正常运行。由于生产系统环境在油管、气体、液体、原位燃烧温度等方面存在较大差异，腐蚀问题应根据其来源区别对待。基于原位燃烧生产系统气液主要环境，研究了油田常用的N80和J95钢在不同温度和压力条件下的腐蚀情况。结果表明，在50℃和3MPa条件下，井的腐蚀最为严重。在分析生产系统腐蚀原因的基础上，研究了液相环境中改性牺牲阳极保护下的腐蚀。