利用热解气相色谱鉴别真假油气显示

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。

Identify The True Or False Oil & Gas Show With The Pyrolysis Gas Chromatography

It is difficult to identify the true or false oil and gas shows because of the contamination of the additives added into the drilling fluid to cuttings.The article introduces a method to identify the true or false oil and gas shows with the pyrolysis gas chromatography technique.The characteristics of various additive curves are given through the detection and analysis of 27 additives.The research and analysis of 15 of them,which give more influnce upon the cuttings,show that the identification of true and false oil and gas show can be performed quickly and accurately through the comparision of the curves of the pyrolysis hydrocarbon and the thermal evaporating hydrocarbon with those of thermal evapotating hydrocarbon with those ofadditives.The practice for a few wells shows that water-washing method is no good for eliminating the contamination while the background deducting method is an ideal one,which can be used to get accurtely the calibration coefficent for the contamination of pyrolysis hydrocarbon and thermal evaporating hygrocarbon.