| 珠江口盆地珠一坳陷古近系“源-汇”系统分类及石油地质意义 |
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| 引用本文： | 杜家元,张向涛,刘培,罗明,张琴,姚佳利,王绪诚,梁杰.珠江口盆地珠一坳陷古近系“源-汇”系统分类及石油地质意义[J].地球科学,2021,46(10):3690-3706. |
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| 作者姓名： | 杜家元 张向涛 刘培 罗明 张琴 姚佳利 王绪诚 梁杰 |
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| 作者单位： | 中海石油(中国)有限公司深圳分公司, 广东深圳 518000 |
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| 基金项目： | “十三五”国家重大专项2016ZX05024-004 |
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| 摘 要： | 珠一坳陷深层古近系两套优质生烃层系内发育的储层具有近源成藏的优势，但其非均质性强、低孔渗的特点制约了油气勘探，研究与此直接相关的“源-汇”系统，对于寻找富烃优储耦合的有利区意义重大.以构造运动和盆山地貌为基础，结合断陷湖盆以半地堑为基本单元的结构特点，划分了盆地级、半地堑级和区带级的三级“源-汇”系统.盆地级分为外源、内源型两类，可用来宏观分析优质烃源岩分布；半地堑级分为陡坡、缓坡和长轴型3类，对于定性评价储层优劣具有较大意义；区带级分为迁移型、转换型、稳定型3类，为有利区目标评价和井点选择提供参考.研究认为迁移型和转换型“源-汇”系统可形成良好的生储盖配置，是最为有利的油气富集区，应作为古近系重点勘探对象.
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| 关 键 词： | 珠江口盆地 珠一坳陷 “源-汇”系统 构造转变 有利区带 石油地质 |
| 收稿时间： | 2020-04-01 |
Classification of Paleogene Source-to-Sink System and Its Petroleum Geological Significance in Zhuyi Depression of Pearl River Mouth Basin |
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| Du Jiayuan,Zhang Xiangtao,Liu Pei,Luo Ming,Zhang Qin,Yao Jiali,Wang Xucheng,Liang Jie.Classification of Paleogene Source-to-Sink System and Its Petroleum Geological Significance in Zhuyi Depression of Pearl River Mouth Basin[J].Earth Science-Journal of China University of Geosciences,2021,46(10):3690-3706. |
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| Authors: | Du Jiayuan Zhang Xiangtao Liu Pei Luo Ming Zhang Qin Yao Jiali Wang Xucheng Liang Jie |
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| Abstract: | The reservoirs developed in the two sets of high-quality hydrocarbon-generating layers in the deep Paleogene of the Zhuyi depression have the advantages of near-source accumulation, but their characteristics of strong heterogeneity, low porosity and permeability have restricted oil and gas exploration. The directly related source-to-sink system is of great significance for finding a favorable area for coupling of hydrocarbon-rich and optimal reservoirs. Based on the influence of regional tectonic movements, and combining the structural characteristics of the rift lake basin with the semi-submarine ridge as its basic unit, source-to-sink system is divided into three levels of basin-level, half-graben-level, and zone-level. Basin-level source-to-sink system is further divided into external and internal source types, which can be used to analyze the distribution of high-quality source rocks; half-graben-level source-to-sink system is further classified into steep slopes, gentle slopes, and long-axis types, which is of great significance to qualitative evaluation of reservoir quality; zone-level source-to-sink system is further divided into three types of migration, conversion, and stability, which provides a good reference for target evaluation and well selection in favorable areas. It is considered that migration-type and conversion-type source-to-sink system can form a good configuration of high-quality source rocks and reservoirs, and are the most favorable oil and gas enrichment areas, which should be the focus of Paleogene exploration. |
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