酸性气田缓蚀剂现场效果评价技术及应用

陈文; 莫林; 何益杉; 陈力力

doi:10.3969/j.issn.1007-3426.2022.04.015

酸性气田缓蚀剂现场效果评价技术及应用

Field evaluation and application of corrosion inhibitor used in sour gas field

摘要

摘要:
目的利用气田水分析、现场腐蚀监测/检测等方法形成酸性气田缓蚀剂现场效果评价技术。
方法在实验室考查了缓蚀剂残余质量浓度分析、超声波测厚、电化学探针等方法的有效性。
结果缓蚀剂残余质量浓度标准曲线拟合值相关系数在99.9%以上、超声波测试结果相对误差最高在0.67%、电化学探针作为评价缓蚀剂的效果手段具有相当的灵敏性。
结论利用形成的酸性气田缓蚀剂现场效果评价技术，在龙王庙某原料气管线开展应用，结果表明可以有效评价缓蚀剂现场应用效果，评价结果与现场腐蚀检测结果相吻合。

Abstract:
Objective The field effect evaluation technology of corrosion inhibitor in sour gas field is formed by gas field water analysis and field corrosion monitoring/detection, etc.
Methods The effectiveness of residual concentration analysis of corrosion inhibitor, ultrasonic thickness measurement and electrochemical probe was investigated in the laboratory.
Results The results show that the R² value of the residual mass concentration of corrosion inhibitor curve is more than 99.9%, the highest relative error of the ultrasonic test result is 0.67%, the electrochemical probe is a sensitive method to evaluate the corrosion inhibitor.
Conclusions The field effect evaluation technology of corrosion inhibitor was applied in a raw gas pipeline in Longwangmiao gas reservoir. The results show this technology can effectively evaluate the field anti-corrosion effect of corrosion inhibitor, and the evaluation results are consistent with the field corrosion detection results.

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