Multistage petroleum charges in the ilurian of Tazhong north slope of the Tarim basin, northwest China:evidence from fluid inclusions and organic geochemistry

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• 出版年：2007
• 作者：PAN LiYin；NI Pei；OU GuangXi；LI LinQiang
• 单位1：Hangzhou Institute of Geology,PetroChina
• 单位2：State Key Laboratory for Mineral Deposits Research,Nanjing University
• 语种：英文
• 作者关键词：Fluid inclusion；Organic geochemistry；Silurian；Tazhong North Slope；Tarim Basin
• 起始页：131
• 总页数：6
• 刊名：岩石学报
• 是否内版：否
• 刊频：月刊
• 创刊时间：1985
• 主办单位：中国矿物岩石地球化学学会；中国科学院地质与地球物理研究所
• 电子信箱：Ihzd@ public.tpt.tj.cn
• 卷：23
• 期：1
• 期刊索取号：P350.66357

摘要

Well S provides a good opportunity to investigate the petroleum filling history in Tazhong North Slope. Petrographicinvestigations suggest that bitumen, oil, and petroleum inclusions coexist in Silurian sandstones from well S, reflecting a complicatedreservoir filling history in the study area. Integration of organic geochemistry and fluid inclusion analysis shows that the Silurianreservoir has experienced three episodes of petroleum charge, that is from the late Silurian to the early Devonian, the early-middleTriassic and the Paleogene, respectively. The present-day reservoir fluids in the Silurian are the mixtures generated in multiple(at least two) episodes of petroleum charge. The oil charging into Silurian resevior in the early period had experienced considerabledegradation, and was mixed with later non-degraded oil.