| 歧口凹陷层序构成样式的时空差异性研究 |
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| 引用本文： | 吴永平,周立宏,王华,廖远涛,王家豪,任培罡,滑双君.歧口凹陷层序构成样式的时空差异性研究[J].大地构造与成矿学,2010,34(4). |
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| 作者姓名： | 吴永平 周立宏 王华 廖远涛 王家豪 任培罡 滑双君 |
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| 作者单位： | 中国石油,大港油田公司,天津,300280;中国石油,大港油田分公司勘探开发研究院,天津,300280;中国地质大学(武汉)构造与油气资源教育部重点实验室/资源学院,湖北,武汉,430074;中国石化,江苏油田分公司博士后工作站,江苏,扬州,225009 |
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| 基金项目： | 教育部"构造与油气资源"重点实验室资助，中国石油天然气股份有限公司大港油田分公司课题 |
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| 摘 要： | 歧口凹陷为中国东部渤海湾盆地内重要的内陆断陷含油气凹陷,具有多幕构造演化、多类构造样式、多个物源体系、沉积体系演化时空变化剧烈等特点,导致层序构成样式在时空上具有显著的差异性。结合歧口凹陷构造古地貌背景和物源供给体系时空演化差异性的研究,在研究区古近系总结出四种典型的层序构成样式:断控陡坡带型层序样式、多级断阶带型层序样式、轴向断坡带型层序样式、挠曲坡折带型层序样式。层序构成样式的时空差异主要受控于宏观构造的幕式演化和局部同沉积断裂不同组合样式所形成的特定的古地貌差异,而物源供给体系的强弱程度以及供给方向变化也是控制层序构成样式的重要因素。不同类型的层序构成样式控制了沉积体系、砂分散体系的时空分布特征,进而影响了砂体的分散和堆积样式。因此,层序构成样式的时空差异性分析对于研究区有利隐蔽圈闭的预测具有重要指导意义。
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| 关 键 词： | 层序构成样式 时空差异性 歧口凹陷 |
Spatiotemporal Differences of Sequence Architecture Styles in the Qikou Sag |
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| WU Yongping,ZHOU Lihong,WANG Hua,LIAO Yuantao,WANG Jiahao,REN Peigang,HUA Shuangjun.Spatiotemporal Differences of Sequence Architecture Styles in the Qikou Sag[J].Geotectonica et Metallogenia,2010,34(4). |
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| Authors: | WU Yongping ZHOU Lihong WANG Hua LIAO Yuantao WANG Jiahao REN Peigang HUA Shuangjun |
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| Abstract: | The Qikou sag is one of the most important intercontinental faulted petroliferous basins in the Bohai bay basin of East China,which is characterized by multi-stage tectonic evolution,multi-class structural styles,multiple provenance systems and complex depositional systems.And indeed,the spatiotemporal differences of sequence architecture styles in the Qikou sag are remarkable.Based on comprehensive study of paleogeomorphology background,provenance and depositional systems,four typical sequence architecture styles can be recognized in the Qikou sag,(1) fault-controlled abrupt slope zone,(2) multi-level fault-terrace zone,(3) axial fault ramp zone,and(4) flexure slope break zone.The spatiotemporal differences of sequence architecture styles are mainly controlled by the multi-episodic tectonic evolution and differential paleogeomorphology resulted from various composite patterns of syndepositional faults.Furthermore,the variations in extent and direction of sediment supply are also significant in controlling the sequence architecture styles.The spatiotemporal differences of sequence architecture styles play an important role in controlling the distribution of depositional systems and sand distributed system,and the stacking patterns of sandbodies.The spatiotemporal difference study of sequences architecture styles has significant implications for the prediction of favorable subtle traps in the Qikou sag. |
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| Keywords: | sequence architecture style spatiotemporal differences Qikou sag |
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