辽西凹陷北洼新生代断裂特征及控藏作用

发布时间：2019-08-10 10:00

【摘要】：基于大量三维地震和钻井资料,分析了渤海海域辽西凹陷北洼新生代断裂的发育特征,并探讨了其对油气成藏的差异控制作用。研究结果表明:辽西凹陷北洼新生代断裂可以划分为早期继承型断裂、早期消亡型断裂、中期继承型断裂、中期消亡型断裂和晚期新生型断裂等5类;早期继承型断裂和中期继承型断裂控制了烃源岩的形成发育和空间展布,并促进了烃源岩热演化生烃;早期继承型控制了断块和潜山圈闭的形成,中期继承型断裂控制了断块和挤压背斜圈闭的形成;早期继承型和中期继承型断裂是油气垂向运移的主力通道,早期消亡型断裂易形成侧向封堵油气成藏,中期消亡型和晚期新生型断裂则对浅层油气的平面调整有着重要的控制作用。本文研究结果对辽西凹陷北洼油气勘探有利区带选择有指导作用。
[Abstract]:Based on a large number of three-dimensional seismic and drilling data, the development characteristics of Cenozoic faults in Beiwa, Liaoxi sag, Bohai Sea are analyzed, and its differential control effect on oil and gas accumulation is discussed. The results show that the Cenozoic faults in Beiwa of Liaoxi sag can be divided into five types: early inherited faults, early extinct faults, medium inherited faults, intermediate extinct faults and late Cenogenetic faults, which control the formation, development and spatial distribution of source rocks and promote the thermal evolution and hydrocarbon generation of source rocks. The formation of fault block and buried hill trap is controlled by early inheritance type, and the formation of fault block and compression anticlinal trap is controlled by middle succession type fault. Early inheritance type and middle stage inheritance fault are the main channels for vertical migration of oil and gas, early extinct fault is easy to form lateral sealing oil and gas accumulation, and middle stage extinct type and late new type fault play an important role in controlling the plane adjustment of shallow oil and gas. The results of this paper can guide the selection of favorable zones for oil and gas exploration in Beiwa, Liaoxi sag.
【作者单位】：中海石油(中国)有限公司天津分公司;中海油能源发展股份有限公司工程技术分公司实验中心;
【基金】：“十二五”国家科技重大专项“渤海海域大中型油气田地质特征(编号:2011ZX05023-006-002)”部分研究成果
【分类号】：P618.13

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