渤中凹陷西次洼浅层晚期快速充注成藏模式

发布时间：2018-06-11 14:58

本文选题：烃源灶 + 包裹体　；参考：《成都理工大学学报(自然科学版)》2017年02期

【摘要】：渤中凹陷西次洼新近系油气资源丰富,成藏主控因素及成藏机理研究有待深入。通过烃源岩成熟度模拟、原油地球化学及油源关系分析、流体包裹体分布特征及均一温度测定,结合断层的封闭性能及疏导体系等成藏要素的综合分析,结果表明:渤中西次洼存在沙三、沙一-沙二与东三段3套烃源岩,其中沙三段为优质烃源岩,成熟度高;该区原油成熟度普较高,为烃源岩在生油高峰及后期生成的原油,主要与沙三段烃源岩相关;渤中8区新近系储层砂岩孔隙烃与油气包裹体发蓝白色荧光,油气包裹体丰度(GOI)普遍较低,主要为一期包裹体,均一温度表明油气主要充注期为3.5 Ma B.P.、1.0 Ma B.P.以后,为晚期快速充注成藏。在新构造运动活动期,持续快速生烃、供烃能力强的烃源灶、高效的断裂输导格架,为晚期快速成藏的主控因素;"高效供烃、主断控藏、浅层聚集"为该区油气成藏模式。
[Abstract]:The oil and gas resources are abundant in the Neogene of the West subsag of the Bozhong sag, and the research on the main controlling factors and the accumulation mechanism of the reservoir remains to be further studied. Through the simulation of the maturity of the source rocks, the analysis of the relationship between the geochemical and oil sources of the crude oil, the distribution characteristics of fluid inclusions and the determination of the homogeneous temperature, the comprehensive analysis of the reservoir forming elements, such as the sealing energy and the dredging system of the faults, is combined. The results show that there are 3 sets of hydrocarbon source rocks, including sand three, Sha 1 - Sha two and East three section, of which three sections of sand are high quality source rocks and high maturity, and the maturity of the crude oil is high, which is the oil source rocks in the peak and later period of oil generation, mainly related to the three hydrocarbon source rocks of the sand, and the pore hydrocarbon and oil and gas inclusions of the Neogene reservoir sandstone in the Bozhong 8 region. With blue and white fluorescence, the abundance of oil and gas inclusions (GOI) is generally low, mainly one phase inclusions. The homogeneous temperature indicates that the main filling period of oil and gas is 3.5 Ma B.P., and after 1 Ma B.P., it is a late rapid filling and formation. The main controlling factors of rapid accumulation are "high efficiency hydrocarbon supply, main fault control reservoir and shallow accumulation".
【作者单位】：中海石油(中国)有限公司天津分公司;
【基金】：“十二五”国家科技重大专项(2011ZX05023-002)
【分类号】：P618.13

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