| 扇三角洲沉积体系及其与油气聚集关系 |
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| 引用本文： | 焦养泉,周海民.扇三角洲沉积体系及其与油气聚集关系[J].沉积学报,1998,16(1):70-75. |
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| 作者姓名： | 焦养泉 周海民 |
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| 作者单位： | 1 中国地质大学 武汉 430074; |
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| 摘 要： | 扇三角洲沉积体系是断陷盆地中极为发育的一种沉积体系，主要由扇三角洲平原组合、扇三角洲前缘组合和前三角洲沉积构成，可识别出9种成因相。受沉积物供给速率、可容空间增长速率及盆缘断裂产状等因素控制可划分出退积型、加积型、前积型、陡坡型和缓坡型5种扇三角洲类型。位于扇三角洲平原的辫状分流河道砂体及其位于扇三角洲前缘的与之有成因联系的水下分流河口坝、洪水型重力流砂体等物性好，可以构成优质储层。含油性勘探成果亦证实各主力油层段平面上主要分布于扇三角洲前缘及分流间湾区，小部分位于扇三角洲平原区。受埋藏深度和成岩场的影响，不同地区、不同层位主力油层段的物性与岩性相关性各异。因此，应用沉积体系分布与油气聚集规律挖掘剩余油层及进行远景区预测是有效的与可行的。
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| 关 键 词： | 扇三角洲沉积体系 油气聚集 |
| 收稿时间： | 1996-12-24 |
Fan Deltaic Depositional Systems and Their Relationship to Oil and Gas Accumulation |
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| Jiao Yangquan, Zhou Haimin, Zhuang Xinguo, Liu Shaofeng, Yang Shengke, Ma Meiyuan.Fan Deltaic Depositional Systems and Their Relationship to Oil and Gas Accumulation[J].Acta Sedimentologica Sinica,1998,16(1):70-75. |
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| Authors: | Jiao Yangquan Zhou Haimin Zhuang Xinguo Liu Shaofeng Yang Shengke Ma Meiyuan |
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| Institution: | 1 China University of Geosciences Wuhan 430074;2 East Hebei Petroleum Exploration and Development Company Hebei Tangshan 063200 |
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| Abstract: | Fan deltaic depositional systems are well developed in rift basins,and usually consist of fan delta plain association, fan delta-front association and prodelta association. Nine genetic factes can be distinguished in fan deltaic depositional systems. Controlled by sediment flux rate, available accommodation expansion rate and basin-bounded fault,fan deltaic depositional system style can be generally divided into five types,i. e. degrading, aggrading,prograding, steep slope and slow slope fan deltas. The braided distributary channel sand-bodies developed in fan delta plains and their related subaqueous distributary mouth bar and flood gravity current sand-bodies deposited in fan delta-front zones are high quality reservoirs. Oil exploration results have shown that principal oil reservoirs are distributed dominantly in fan delta-front zones and interdistributary bays,and some reservoirs are developed in fan delta plain areas. Influenced by burial-depth and diagenesis,principal oilbearing beds in different areas and different horizons are different because of the various relationships between physical properties and lithologies. Therefore, the relationship of depositional system distribution to oil and gas accumulation can be applied to search for residual oil-bearing beds and tO predict prospect areas. |
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| Keywords: | fan deltaic depositional system oil and gas accumulation |
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