| “构造坡折带”——断陷盆地层序分析和油气预测的重要概念 |
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| 引用本文： | 林畅松,潘元林.“构造坡折带”——断陷盆地层序分析和油气预测的重要概念[J].地球科学,2000,25(3):260-266. |
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| 作者姓名： | 林畅松 潘元林 |
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| 作者单位： | 1.中国地质大学能源地质系, 北京 100083 |
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| 基金项目： | 胜利油田管理局资助项目，， |
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| 摘 要： | 构造坡折带是指由同沉积构造长期活动引起的沉积斜坡明显突变的地带.渤海湾等盆地的研究表明, 断陷湖盆中存在的构造坡折带制约着盆地可容纳空间的变化, 对层序的发育、沉积体系域及砂体的分布起重要的控制作用.在半地堑盆地中可划分出凸起-缓坡边缘、缓坡-洼陷边缘、陡坡-洼陷边缘、凸起-陡坡边缘等断裂坡折带, 识别了“梳状构造”、“帚状构造”、“叉型构造”等同沉积的构造(断裂) 坡折带样式, 它们控制着特定的沉积相域和砂体的展布形式.构造坡折带是油气藏形成的极有利地带.洼陷边缘断裂坡折带, 如“梳状构造”等构成盆地深部预测勘探的重要领域.
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| 关 键 词： | 构造坡折带 砂体预测 断陷盆地 |
| 收稿时间： | 1999-10-08 |
STRUCTURAL SLOPE-BREAK ZONE: KEY CONCEPT FOR STRATIGRAPHIC SEQUENCE ANALYSIS AND PETROLEUM FORECASTING IN FAULT SUBSIDENCE BASINS |
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| Lin Changsong,Pan Yuanlin,Xiao Jianxin,Kong Fanian,Liu Jingyan,Zheng Herong.STRUCTURAL SLOPE-BREAK ZONE: KEY CONCEPT FOR STRATIGRAPHIC SEQUENCE ANALYSIS AND PETROLEUM FORECASTING IN FAULT SUBSIDENCE BASINS[J].Earth Science-Journal of China University of Geosciences,2000,25(3):260-266. |
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| Authors: | Lin Changsong Pan Yuanlin Xiao Jianxin Kong Fanian Liu Jingyan Zheng Herong |
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| Abstract: | The structural slope-break zone, resulting in the abrupt change of the depositional slope, is initiated by the long-term activity of syndepositional structure. The researches into the Bohaiwan basin indicate that the structural slope-break zone in the fault subsidence lacustrine basin constrained the change in the accommodation space of the basins, controlling the development of the depositional sequence and the distribution of the depositional system tracts and the sand bodies. The half-graben basin may accommodate the following four kinds of structual slope-break zones: uplift-gentle-slope margins, gentle slope-depression margins, steep-slope-depression margins, and uplift-steep-slope margins. Furthermore, several syndepositional structural (fault) slope-break patterns are identified such as "comb-like structure" and "broom-like structure". These structures controlled the distribution patterns of the specific depositional systems tracts and the sand bodies in the basin. The structural slope-break zone is favorable for the formation of petroleum accumulation. The structual slope-break zone at the depression margin such as the "comb-like structure" has proved important for the prediction and exploration of the deep-seated subtle traps in the basin. |
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| Keywords: | structural slope_break zone sand_body prediction fault basin |
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