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利用高温高压反应釜进行冲蚀、腐蚀和冲蚀腐蚀迭加3种条件下的多元热流体稠油热采防砂筛管损坏模拟实验,采用失重法获得3种条件下筛管挡砂介质的腐蚀速率,434金属棉在迭加条件下的腐蚀速率较纯冲蚀条件下提高了75倍,较纯腐蚀条件下也提高了53%。采用宏观观察、扫描电子显微镜(SEM)、能谱仪(EDS)等方法对腐蚀试样进行宏微观分析,发现迭加条件下材质腐蚀程度均比单一条件下显著。结果表明,在迭加作用下筛管材质的腐蚀速率显著高于单纯冲蚀和单纯腐蚀条件。腐蚀作用对机体的损伤以及冲蚀作用对腐蚀保护膜的破坏两方面相互促进,导致筛管材质损伤程度的增加。
Using high temperature and high pressure reactor for erosion, corrosion and erosion corrosion superimposed multi-thermal fluid under three conditions, heavy oil thermal recovery of sand control screen damage simulation experiment, using the weight loss method to obtain three kinds of conditions of sieve sand blocking medium corrosion The rate of corrosion of 434 metal cotton under conditions of superposition was increased by 75 times as compared with that under pure conditions and by 53% under pure conditions. The macroscopical and microscopic analysis of the corroded samples by macroscopic observation, scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and other methods showed that the corrosion degree of the materials under the superposition condition was higher than that under the single condition. The results show that the corrosion rate of the sieve material is significantly higher than that of pure erosion and simple corrosion under the superposition. Corrosion on the body damage and erosion of the protective film corrosion damage both promote each other, resulting in increased damage to the screen material.