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THE RELIABILITY OF LABORATORY AND FIELD PARAMETERS USED IN THE PREDICTIONMODELS

机译：预测模型中使用的实验室参数和现场参数的可靠性

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Several attempts have been made by different companies and research institutes to compare the field datawith the predicted internal corrosion rate/corrosivity but the matching of the actual and predicted corrosion rateshas not been successful in many cases. In fact, some of the important parameters collected from fields orobtained in laboratories do not have the same meaning as the data used in the prediction models. Many of theconditions existing in fields can not be produced in laboratories. The accuracy of the field data is alsoquestionable in many cases and if this is the case, there is a risk of considering an accurate prediction as wrong.There is lack of knowledge for the impact of some important parameters, like small amount of H2S and organicacids, on the corrosion rate measured in the field. The mechanism of the localised corrosion does not allow theprediction of an accurate corrosion rate. The paper analyses in details the accuracy of some production andcorrosion data collected from fields, explains why the fact that prediction models give different results is normaland the prediction of an accurate corrosion rate is actually neither possible nor required. It is suggested that theoil industry concentrates its efforts to predict properly the influence of important parameters on the corrosivity,improve the validity of the data and to develop an approach to predict 'low corrosivity', 'medium corrosivity'and 'high corrosivity'.
机译：不同的公司和研究机构已经进行了几次尝试，以将现场数据与预测的内部腐蚀速率/腐蚀性进行比较，但是在许多情况下，实际腐蚀速率和预测腐蚀速率的匹配并不成功。实际上，从实验室获得或从实验室获得的一些重要参数与预测模型中使用的数据的含义不同。野外存在的许多条件无法在实验室中产生。在许多情况下，现场数据的准确性也是值得怀疑的，如果是这种情况，则存在将准确的预测视为错误的风险。缺乏对一些重要参数（例如少量的H2S和有机酸）的影响的知识，关于在现场测得的腐蚀速率。局部腐蚀的机理不能预测准确的腐蚀速率。本文详细分析了从现场收集的一些生产和腐蚀数据的准确性，解释了为什么预测模型给出不同结果这一事实是正常的，而精确腐蚀率的预测实际上既不可能也不是必需的。建议石油工业集中精力正确预测重要参数对腐蚀性的影响，提高数据的有效性，并开发一种预测“低腐蚀性”，“中腐蚀性”和“高腐蚀性”的方法。

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