塔里木盆地顺1走滑断裂带超深储层油气充注历史

顺北地区是近期塔里木盆地超深层油气勘探获得重大突破的领域。通过顺北地区奥陶系一间房组储层原油和天然气地化特征对比，并结合荧光颜色和显微荧光光谱参数分析，认为顺北地区奥陶系经历了多期油气充注，且早期充注原油遭受一定程度的生物降解，而天然气为原油伴生气。利用类异戊二烯烃、生物标志化合物和原油轻烃对顺北地区和顺南地区原油进行对比，发现顺北地区油气来源与顺南地区一样来自于寒武系玉尔吐斯组烃源岩，通过断穿寒武系的断层向上运移至奥陶系储集层。对顺北地区采集样品进行流体包裹体测试、冷阴极发光、荧光观察等系统分析，结果表明顺北地区发生了“五幕三期”油充注和一期天然气充注，第一期为加里东晚期，第二期为海西晚期，第三期为喜马拉雅晚期，而天然气充注发生在喜马拉雅晚期。

Hydrocarbon charging history of the ultra-deep reservoir in Shun 1 strike-slip fault zone,Tarim Basin

Major breakthrough in oil-gas exploration has been made in the ultra-deep strata of Shunbei area,Tarim Basin.Following the geochemistry comparison of crude oil and natural gas in the Ordovician Yijianfang Formation in Shunbei area,combined with the analysis of microscopic fluorescence spectrum parameters and fluorescence color,we put forward that the study area has undergone multi-stage hydrocarbon charging,the crude oil charged earlier has experienced biodegradation to a certain degree,while the gas is associated with the crude oil.In addition,through the comparison of crude oil in Shunbei and Shunnan areas in terms of isoprenoid parameters,biomarker compounds and light hydrocarbons in crude oils,we found that the hydrocarbon in Shunbei area is derived from the same source rocks as Shunnan area,that is,from the Cambrian Yurtusi Formation source rocks,and has migrated up to the Ordovician reservoirs along the faults cutting through the Cambrian.The samples collected in Shunbei area were analyzed systematically by fluid inclusion testing,as well as cold cathodoluminescence and fluorescent observations.The results show that there are three stages of oil charging in the late Caledonian,late Hercynian,and late Himalayan respectively,and one-stage gas charging in the late Himalayan.