辽河盆地东部凹陷震积岩发现及研究
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摘要
2006年,通过对辽河盆地东部凹陷岩心的观察研究,在沙河街组发现了大量与地震活动有关的变形构造,如液化砂岩脉、角砾状构造、不协调岩块、液化卷曲变形构造、阶梯状小断层等。通过对牛18、牛22、台3、台10、龙9等井的系统观察,发现震积岩的分布和震积特征的强烈程度与区域的断裂构造活动有密切的关系。辽河盆地震积岩的发现不但有助于判断控盆边界断裂的强烈活动时期,而且震积岩自身也可能是一种潜在的油气储集体。此外,通过对震积岩的研究,还可以更多地了解古代地震发生的规律,为人类预测地震活动提供有利证据。
Core observation in the eastern depression of Liaohe Basin in 2006 had discovered many earthquake-related deformation structures in Shahejie formation, such as liquefied sandstone veins, brecciated structure, discordant rocks, liquefied curled deformation structure, and multiple minor faults. Systematic observation on Well Niu18, Niu22, Tai3, Tai10 and Long9 indicates that the distribution of seismite and the intensity of earthquake deposit were closely related to regional faulting movements. The discovery of seismite is helpful to identify the intense moving stage of basin-controlling boundary faults, and the seismite itself may also be a potential hydrocarbon reservoir. In addition, seismite study can provide more about ancient earthquake and provide evidence for present earthquake forecasting.
Core observation in the eastern depression of Liaohe Basin in 2006 had discovered many earthquake-related deformation structures in Shahejie formation, such as liquefied sandstone veins, brecciated structure, discordant rocks, liquefied curled deformation structure, and multiple minor faults. Systematic observation on Well Niu18, Niu22, Tai3, Tai10 and Long9 indicates that the distribution of seismite and the intensity of earthquake deposit were closely related to regional faulting movements. The discovery of seismite is helpful to identify the intense moving stage of basin-controlling boundary faults, and the seismite itself may also be a potential hydrocarbon reservoir. In addition, seismite study can provide more about ancient earthquake and provide evidence for present earthquake forecasting.
引文
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[3]袁静.中国震积作用和震积岩研究进展[J].石油大学学报(自然科学版),2005,29(1):144～149.
[4]贾松,彭军,刘建峰.国内震积岩研究现状[J].地质灾害与环境保护,2006,17(1):39～44.
[5]安明泉,震积岩在岩心中的识别及研究[J].断块油气田,2005,12(3):25～27.
[6]乔秀夫,宋天锐,高林志.碳酸盐岩振动液化地震序列[J].地质学报,1994,68(1):16～32.
[7]杨剑萍,王辉,陈世悦,等.济阳坳陷古近系震积岩特征[J].沉积学报,2004,22(2):281～287.
[8]宫丽清,杨剑萍.济阳坳陷古近系沙河街组震积岩特征及其储集性能[J].新疆石油地质,2007,28(1):44～47
[9]郭建华,王方平,刘贵.湘西大庸上震旦统灯影组震裂角砾岩[J].石油实验地质,1999,21(3):219～224.
[10]乔秀夫,宋天锐,李海兵.是地震液化泄水成因,不是“渗流管”构造[J].科学通报,2002,47(14):1118～1120.
[11]吴贤涛,尹国勋.四川峨眉晚侏罗世湖泊沉积中震积岩的发现及其意义[J].沉积学报,1992,10(3):19～25.
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[13]冉勇康,邓起东.古地震学研究的历史、现状和发展趋势[J].科学通报,1999,44(1):12～20.
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