苏北-南黄海盆地NW向断层特征及形成机制

发布时间：2018-02-16 05:42

本文关键词： NW向断层基底形成机制南五凹苏北-南黄海盆地　出处：《中国矿业大学学报》2017年06期 　论文类型：期刊论文

【摘要】：通过重磁资料分析和地震资料的解释,结合前人对周缘地区NW向构造的研究成果,分析了苏北-南黄海盆地的构造演化与断层特征,揭示了该盆地陆地部分和海域部分NW构造的不同表现形式,指出海域内NW向断层对油气成藏具有制约作用.研究结果表明:断拗期南五凹存在3个沉积中心,NW向断层拉张率12%~14%,断层最大活动速率170m/Ma,控制了阜宁组烃源岩的发育.陆上隐伏有3条NW向的构造转换带,错断和限制了NE向7个控凹断层和建湖隆起的展布;海域3条显现的NW向断层控制了南二凹和南五凹的平面形态,以及南四凹、南六凹和南七凹的雁行式排列.海域成藏受到NW向构造的控制,预测油气主要分布在阜宁组的沉积中心附近.
[Abstract]:Based on the analysis of gravity and magnetic data and the interpretation of seismic data, the tectonic evolution and fault characteristics of the Huang Hai basin in the north and south of Jiangsu Province are analyzed by combining with the previous research results of NW trending structures in the peripheral area. The different forms of NW structures in the land and sea areas of the basin are revealed. It is pointed out that the NW trending fault in the sea area has a restrictive effect on hydrocarbon accumulation. The results show that there are three sedimentary centers in Nanwu depression during the fault depression. The extensional rate of NW fault is 12 / 14 and the maximum activity rate of fault is 170 m / Ma. which controls the source rock generation of Funing formation. There are three NW-trending tectonic transition zones on land. The fault fault limits the distribution of seven NE trending controlled concave faults and Jianhu uplift, and three NW faults in the sea area control the plane morphology of the South second and South Fifth concave, as well as the South fourth Concave. The reservoir formation in the sea area is controlled by the NW trending structure, and the oil and gas distribution is mainly near the sedimentary center of Funing formation.
【作者单位】：中海油研究总院;
【基金】：国家科技重大专项(2016ZX05024-002)
【分类号】：P618.13

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