| 珠江口盆地恩平凹陷断层特征及其对新近系油气成藏的影响 |
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| 引用本文： | 许新明,陈胜红,王福国,胡坤,于水明,王绪诚,高中亮,刘贤来.珠江口盆地恩平凹陷断层特征及其对新近系油气成藏的影响[J].现代地质,2014,28(3):543-550. |
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| 作者姓名： | 许新明 陈胜红 王福国 胡坤 于水明 王绪诚 高中亮 刘贤来 |
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| 作者单位： | (中海石油(中国)有限公司 深圳分公司，广东 广州510240) |
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| 基金项目： | “十二五”国家重大专项“大型油气田及煤层气开发”子课题“南海东部海域已证实的富生烃凹陷再评价及新领域勘探方向”(2011ZX05023-001-006) |
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| 摘 要： | 断层是油气纵向输导的主要通道，其发育特征与断圈的油气成藏有着密切的联系。通过分析恩平凹陷断层特征，将该区断层划分为2个断层系统4类不同活动期次的断层，并系统研究了断层的构造样式、活动性和封闭性对本区新近系油气成藏的影响。结果表明：恩平凹陷新近系发育7种构造样式，控制着新近系各二级构造带圈闭发育类型，翘倾半背斜和背斜是该区最有利的成藏类型；长期型断层和晚期型断层是本区主要的控运断层，在油气运聚与成藏中断层具有通道和封堵的双重作用，其封堵性制约了油气烃柱高度，而活动性主导了新近系油气富集程度，且断层生长指数为1.09是该区控运期断层纵向输导成藏的临界值，随着控运断层活动性增大，断层纵向输导能力增强,新近系圈闭成藏的概率越高。
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| 关 键 词： | 恩平凹陷 断层特征 断层活动性 断层封闭性 构造样式 新近系 |
Structural Features and Its Impacts on Hydrcarbon Accumulation of Neogene in Enping Sag,Pearl River Mouth Basin |
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| XU Xin-ming,CHEN Sheng-hong,WANG Fu-guo,HU Kun,YU Shui-ming,WANG Xu-cheng,G.Structural Features and Its Impacts on Hydrcarbon Accumulation of Neogene in Enping Sag,Pearl River Mouth Basin[J].Geoscience——Journal of Graduate School,China University of Geosciences,2014,28(3):543-550. |
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| Authors: | XU Xin-ming CHEN Sheng-hong WANG Fu-guo HU Kun YU Shui-ming WANG Xu-cheng G |
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| Institution: | (Shenzhen Branch, CNOOC Ltd, Guangzhou,Guangdong510240, China) |
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| Abstract: | There is close contact between fault features and faulted reservoir accumulation, because fault is the main channel of vertical hydrocarbon migration. Based on the analysis of fault features of Enping Sag, the fault is divided into 2 fault systems and 4 kinds of faults in different active stages, and then its structural styles, activities, sealing and its impacts on hydrcarbon accumulation in Neogene are studied. The results show that 7 structural styles were summarized from kinds of faulted belts, in which developing tilting half anticline and anticline are the most favorable traps in hydrocarbon accumulation; The long active faults and the late active faults are the main migration faults of Enping Sag, which play dual role with channel and sealing in hydrocarbon accumulation: its sealing abilities restricted the hydrocarbon column height, and its activities controlled the hydrocarbon enrichment of drilling traps; So the rules between drilling hydrocarbon enrichment and the migration faults activities of migration period is introduced, that is, 1.09 is the critical value of faults activities growing index in migration period; The higher of the growing index is, the stronger of fault’s vertical migration abilities is, so the better hydrocarbon accumulation probability in Neogene traps is. |
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| Keywords: | Enping Sag fault feature fault activity fault sealing structural style Neogene |
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