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

被引：0
|
作者：
Yang H. [1 ]
Xu C. [1 ]
Niu C. [1 ]
Qian G. [1 ]
Li Z. [1 ]
Gao Y. [1 ]
Huang Z. [1 ]
机构：
[1] Tianjin Branch of CNOOC Ltd., Tianjin
来源：
Oil and Gas Geology | 2020年 / 41卷 / 02期
关键词：
Bohai Bay Basin; Huanghekou Sag; Hydrocarbon accumulation pattern; Major factor controlling hydrocarbon accumulation; Neogene; Quantitative evaluation;
D O I：
10.11743/ogg20200203
中图分类号：
学科分类号：
摘要：
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. © 2020, OIL & GAS GEOLOGY Editorial Board. All right reserved.
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页码：259 / 269
页数：10
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