渤海湾盆地黄河口凹陷新近系油气富集模式与成藏主控因素定量评价

doi:10.11743/ogg20200203

Abstract

Abstract:

The quantitative study on hydrocarbon accumulation has always been a thorny problem in hydrocarbon exploration.In combining with a series of analyses including 3D seismic and logging data, we carry out a comprehensive study focusing on the setting and pattern of, as well as factors controlling hydrocarbon accumulation in the Neogene of Huanghe-kou Sag.The results show that the hydrocarbons mainly enrich in inverted strike-slip and faulted uplift structural belts, demonstrating two distinct accumulation patterns.The hydrocarbon migration of the Neogene in the strike-slip inverted belt is controlled jointly by the activity intensity of source rock-rooted fault and regional seal thickness in the Paleogene; while that of the Neogene in the faulted uplift belt is controlled jointly by the transporting ridges and late faults cutting through the reservoir.Further, the quantitative evaluation model and formulae characterizing the hydrocarbon migration capacity under the two accumulation patterns are established.In addition to the hydrocarbon oil source conditions, the scale of hydrocarbon accumulation is also controlled by the contact area between fault and sand body.The larger the total contact area between sand bodies and source rock-rooted faults, the higher the fill factor of the reservoir will generally be.

Key words: hydrocarbon accumulation pattern, quantitative evaluation, major factor controlling hydrocarbon accumulation, Neogene, Huanghekou Sag, Bohai Bay Basin

CLC Number:

TE122.3

Haifeng Yang, Changgui Xu, Chengmin Niu, Geng Qian, Zhengyu Li, Yanfei Gao, Zhen Huang. Quantitative evaluation of hydrocarbon accumulation pattern and the controlling factors in the Neogene of Huanghekou Sag, Bohai Bay Basin[J]. Oil & Gas Geology, 2020, 41(2): 259-269.

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构造区	圈-源关系	富集模式	主控因素
走滑反转带	同位	垂向贯通	断层活动强度	古近系区域盖层厚度
断隆带	异位	侧向汇聚垂向再分配	仓储层输导脊	切仓断层

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Quantitative evaluation of hydrocarbon accumulation pattern and the controlling factors in the Neogene of Huanghekou Sag, Bohai Bay Basin

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