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由于钻井液添加剂对岩屑的污染,给识别真假油气显示造成了一定的难度。该文介绍了一种利用热解气相色谱分析技术鉴别真假油气显示的方法。通过对27种添加剂检测分析,分别得出不同添加剂的色谱曲线特征,其中针对15种对岩屑影响较大的添加剂的曲线特征分析研究发现应用热蒸发烃、热解烃色谱曲线与添加剂的热解指纹谱图对比,可快速、准确的鉴别真假油气显示,多口井的实践表明,此方法对现场录井具有重要意义。此外,通过实验证实水洗法排除样品污染较差,利用扣除本底法可准确求得热蒸发烃、热解烃污染校正系数,是排除样品污染的较理想方法。
Due to the drilling fluid additives on the debris pollution, to identify the true and false oil and gas shows a certain degree of difficulty. This paper introduces a method of using pyrolysis gas chromatographic analysis to identify true and false hydrocarbon displays. By analyzing and analyzing 27 kinds of additives, the chromatographic characteristics of different additives were obtained respectively. According to the curve characteristic analysis of 15 kinds of additives that have a great influence on cuttings, it was found that by using the data of thermal evaporation hydrocarbons, pyrolysis hydrocarbon chromatograms and additives Anti-fingerprint spectrum comparison, can quickly and accurately identify the true and false oil and gas show that the practice of multiple wells shows that this method is important for on-site logging. In addition, it was confirmed by experiments that water washing method can not eliminate sample contamination badly. Using the deduction of background method, the correct coefficient of thermal evaporation hydrocarbon and pyrolysis hydrocarbon pollution can be obtained accurately, which is the ideal method to eliminate sample pollution.