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为了探索石油钻井过程中利用红外光气体检测技术实现烃类气体检测的可行性,依据红外光吸收技术原理,进行了利用红外光气体检测技术对不同体积分数的甲烷、乙烷、丙烷、异丁烷、正丁烷和混合烃气检测分析实验。实验结果表明,注样气体体积分数与检测值之间的相关系数均超过了0.95,最高接近1。从现场应用角度,列举了两口井应用红外光和色谱气体检测技术异常显示井段的全烃曲线,结果表明两曲线特征基本相同,而且特征明显,可满足现场气体录井要求。由于各烃组分红外光谱吸收波长比较接近,难于区分烃组分,该方法用于烃组分的检测尚需进行深入研究与实验。
In order to explore the feasibility of using infrared light gas detection technology to detect hydrocarbon gas in oil drilling process, according to the principle of infrared light absorption technology, the use of infrared gas detection technology for different volumes of methane, ethane, propane, isobutyl Alkane, n-butane and mixed hydrocarbon gas detection and analysis experiments. The experimental results show that the correlation coefficients between the volume fraction of injected gas and the measured value both exceed 0.95 and the maximum is close to 1. From the point of view of application in the field, the total hydrocarbon curve of the well section of the two wells, which is abnormally detected by infrared light and chromatographic gas detection, is listed. The results show that the characteristics of the two curves are basically the same and the characteristics are obvious, which can meet the requirements of field gas logging. Due to the relatively close infrared spectral absorption wavelengths of each hydrocarbon component, it is difficult to distinguish between hydrocarbon components. However, this method needs further investigation and experimentation for the detection of hydrocarbon components.