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Failure Analysis: In-situ combustion injector well tubing failure

机译：故障分析：原位燃烧喷油器井管故障

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摘要

Severe plugging of injector wells within 15 months of commissioning is attributed to severe corrosion of N-80 steel tubing in the vicinity of the combustion front. The tubing material was found to be highly susceptible to high-temperature oxidation during the combustion phase, followed by conversion of protective magnetite scale into heterogeneous hematite during the wet phase because of inhibitor nonperformance. A new well completion design consisting of API 5 CT L-80 type 13 chromium steel sections in the vicinity of the perforation was suggested. A suitable corrosion inhibitor was recommended to protect the N-80 steel portion of the tubing.
机译：投产后15个月内，注入井的严重堵塞是由于N-80钢管在燃烧前沿附近的严重腐蚀所致。发现该管材在燃烧阶段对高温氧化非常敏感，然后在湿润阶段由于抑制剂的不起作用，将保护性磁铁矿垢转化为异质赤铁矿。提出了一种新的完井设计，该设计由射孔附近的API 5 CT L-80 13型铬钢段组成。建议使用合适的腐蚀抑制剂来保护管道的N-80钢部分。

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