Ramp zone types and their hydrocarbon distribution characteristics in the Bohai Bay Basin

被引：0
|
作者：
Zhao S. [1 ]
Liu H. [1 ]
Jiang Y. [1 ]
Wang Y. [2 ]
Hao X. [2 ]
Zhang C. [1 ]
机构：
[1] School of Geosciences, China University of Petroleum(East China), Qingdao, 266580, Shandong
[2] Research Institute of Petroleum Exploration and Development of Shengli Oilfield Branch Company, SINOPEC, Dongying, 257001, Shandong
来源：
Oil and Gas Geology | 2019年 / 40卷 / 02期
关键词：
Accumulation pattern; Bohai Bay Basin; Hydrocarbon distribution; Ramp zone; Structural style;
D O I：
10.11743/ogg20190202
中图分类号：
学科分类号：
摘要：
The ramp zone of the petroliferous basin is a favorable area for hydrocarbon accumulation. To identify the distribution of oil and gas in the ramp zones of various kinds is of great significance for oil and gas exploration. Taking the Bohai Bay Basin as an example, we divided its ramps into three types, namely the simple type, transitional type and complex type, based on the basement geometry of the ramps under the impact of tectonic zonation. The simple type of ramp zone is characterized by weak tectonic activity and one-way dipping basement geometry with a small dip; structural-litho- logic and lithologic reservoirs are dominant in this type, and its hydrocarbon enrichment concentrates in one single layer and most hydrocarbons accumulate in early periods with a typical "line-styled" hydrocarbon distribution. The transitional type features stronger tectonic movement and the two-way dipping basement geometry, and the structural and structural-lithologic reservoirs are dominant in this type, with a small number of stratigraphic reservoirs. Hydrocarbons enrich in multiple layers through migration along faults and sand body, resulting in a ladder-shaped reservoir distribution. While the complex ramp zone features strong tectonic activity and three-way dipping basement geometry. The structural and structu-ral-lithologic reservoirs are dominant, with a large number of stratigraphic reservoirs. The hydrocarbons enrich in multiple layers, leading to a "comb-shaped" reservoir distribution. © 2019, OIL & GAS GEOLOGY Editorial Board. All right reserved.
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页码：223 / 235
页数：12
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