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ASSESSMENT AND CONTROL OF TOP SIDE/RISER/PIPELINECORROSION OF A SUBSEA GAS RE-INJECTION SYSTEM

机译:SUBSAEA气体再注入系统顶部/上升/管道腐蚀的评估和控制

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Severe corrosion and operating problems due to deposition of solids in an offshore gas re-injection system were investigated. Potential corrosion mechanisms were identified and matchedto the morphology and location of the observed corrosion damage. Predicted corrosion rateswere compared with observed corrosion rates. Carbon dioxide, hydrogen sulphide, oxygen,elemental sulfur, chlorides methanol and combinations thereof were considered. Corrosion dueto elemental sulphur was identified as the mostly likely cause of corrosion. The sulphur dropwas the result of reaction between hydrogen sulphide and oxygen following oxygen ingress intothe sour process gas. Further corrosion was prevented by eliminating the source of oxygeningress. This also solved the operational problems created by the solids.
机译:研究了由于海上气体再注入系统中固体沉积而导致的严重腐蚀和运行问题。确定潜在的腐蚀机理,并将其与观察到的腐蚀破坏的形态和位置相匹配。将预测的腐蚀速率与观察到的腐蚀速率进行比较。考虑了二氧化碳,硫化氢,氧气,元素硫,氯化物,甲醇及其组合。元素硫引起的腐蚀被确定为腐蚀的最可能原因。硫的下降是氧气进入酸性工艺气体后硫化氢与氧气之间反应的结果。消除氧合剂的来源可防止进一步的腐蚀。这也解决了由固体产生的操作问题。

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