超临界CO2萃取技术在地表油气化探中的应用

摘要

Using supercritical CO2 fluid extraction technology for the extraction of polycyclic aromatic hydrocarbons from oil and gas geochemical exploration samples and using fluorescence spectrometer to conduct verification show that the repeatability and stability are relatively satisfactory with RSD less than 5％.Compared with conventional geochemical cold extraction method,this technology shows obvious advantages.Following the analysis of data obtained by supercritical CO2 extraction technology in Nanyang N65 well profile and a comparison with the geochemical exploration indexes such as headspace light hydrocarbon and acid-extraction hydrocarbon (SAEH),the authors carried out surface geochemical exploration in the Black Dragon Temple in Nanyang depression area,and found that the supercritical carbon dioxide technology would be helpful to the delineation of accumulation areas for oil and gas.%超临界CO2流体萃取技术萃取地表油气化探样品中的稠环芳烃,以荧光光谱仪进行测定,重复性和稳定性较好,其相对标准偏差小于5％,与常规化探冷萃取方法对比显示出明显的优势.将该技术应用于南阳凹陷N65井区剖面上,分析测试数据,并与顶空气轻烃、酸解烃等化探指标进行对比,随后在南阳凹陷黑龙庙地区开展地表油气勘探,结果发现,超临界CO2技术在圈划油气聚集区方面有一定作用.