成熟凝析油色—质谱分析及在石油地质中的应用

色—质谱分析技术已发展成为发现油气层的实用技术,在石油地质勘探领域占据着重要地位,并在勘探和寻找油气层等方面做出了重要贡献.根据渤海湾盆地东濮凹陷文23气田、白庙、桥口深层以及塔里木盆地中1井共11个凝析油样品轻烃组分色谱—质谱分析资料,进行了异构烷烃的定性与定量研究,并应用一些新的轻烃地球化学指标,准确地判定了油气特征.结果表明:东濮凹陷文23气田主要为煤型凝析气藏,其凝析油为高成熟—过成熟阶段生成的煤型凝析油;白庙凝析气藏所含的凝析油主要为泥岩地层在生油高峰—高成熟阶段生成的凝析油;塔里木盆地中1井2个样品所含凝析油为高成熟—过成熟阶段海相碳酸盐岩地层生成的凝析油,与东濮凹陷文23气田以及白庙地区的凝析油存在显著差别. 

GC-MS ANALYSIS OF MATURE CONDENSATE OIL AND ITS APPLICATION IN PETROLEUM GEOLOGY

GC-MS analysis has become an applied technique in seeking oil-and gas-layers.With its great contributions to oil and gas discoveries,this technique has played an important role in petroleum exploration.11 condensate oil samples from Wen 23 gasfield,Baimiao gas pool and Qiaokou area in Pu-yang Sag,Bohai Bay Basin as well as Well Zhong-1 in Tarim Basin have been analyzed by GC-MS technique.The qualitative and quantitative analyses of the isomeric alkanes have been made,some new light hydrocarbon geochemical parameters have been determined,and the oil and gas signatures have been identified.The results show that Wen 23 gasfield generally belongs to coal condensate gas reservoir,and its condensate oil is generated during the high to ripen mature stages;the condensate oil in Baimiao gas pool is the product of the mudstone strata during their high mature stage;whereas the condensate oil in Well Zhong-1 inTarim Basin is the product of the marine carbonate strata in their high to ripen mature stages,different distinctively from the condensate oil of Wen 23 gasfield and Baimiao area,Dongpu Sag.