珠江口盆地东部中新统珠江组碳酸盐岩沉积微相研究

冯琳; 邓敏; 卫哲; 曾驿; 周小康

珠江口盆地东部中新统珠江组碳酸盐岩沉积微相研究

冯琳^{1, 2,},
邓敏^{1, 2},
卫哲³,
曾驿³,
周小康³

1.
成都理工大学沉积地质研究院, 成都 610059
2.
油气藏地质及开发工程国家重点实验室, 成都理工大学, 成都 610059
3.
中海石油（中国）有限公司深圳分公司研究院, 广州 510240

基金项目:

国家科技重大专项子课题“珠江口盆地碳酸盐岩识别与储层评价” Z2008SLSZ-052

详细信息

作者简介:
冯琳（1988-），女，湖北省襄阳市人，硕士研究生，沉积学专业。E-mail：mefenglin@163.com

中图分类号: TE121.3
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出版历程
- 收稿日期: 2013-09-28
- 刊出日期: 2014-03-28

RESEARCH ON CARBONATE MICROFACIES IN MIOCENE ZHUJIANG FORMATION IN EAST PEARL RIVER MOUTH BASIN

FENG Lin^{1, 2
,},
DENG Min^{1, 2},
WEI Zhe³,
ZENG Yi³,
ZHOU Xiao-kang³

1.
Research Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China
2.
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, China
3.
Research Institute of Shenzhen Branch of China National Offshore Oil Corporation Limited, Guangzhou 510240, China

摘要

摘要: 基于对珠江口盆地东部新近系下中新统珠江组碳酸盐岩1483块常规及铸体薄片显微特征的观察、描述以及古生物特征和岩石学特征的研究，依据碳酸盐岩颗粒组分和结构构造等特点，将珠江组碳酸盐岩划分为8个主要微相类型，并根据灰岩颗粒类型及相对含量的多少，将其进一步细分为22个次一级的微相类型。根据这些微相类型在纵向上的组合特征与环境意义，可在珠江组碳酸盐岩中识别出碳酸盐岩缓坡、局限台地、开阔台地、台地边缘滩、台地边缘礁、台地前斜坡等6个沉积相带。这些沉积相的纵向演化规律揭示了东沙隆起在早中新世海平面上升过程中经历了由碳酸盐岩缓坡到台地的沉积演化历程。
- 珠江口盆地东部 /
- 珠江组 /
- 碳酸盐岩 /
- 沉积相 /
- 沉积微相
Abstract: Based on the microscopic observation and description of Paleontological characteristics and lithological features about the 1483 carbonate conventional or the casting thin sections, which come from the Miocene Zhujiang Formation in East Pearl River Mouth Basin, judging by our study of their particles, textures and structures, the carbonate rock of Zhujiang Formation can be divided into 8 main microfacies types, and according to their grain types and relative amount, these main microfacies can further be divided into 22 primary microfacies types. On the basis of the longitudinal combination features and environmental significances of these microfacies types, the carbonate rock of Zhujiang Formation can be divided into 6 sedimentary facies: carbonate ramp, restricted flatform, open platform, platform-margin shoal, platform margin reef and fore-platform slope. The vertical evolution of sedimentary facies reveals that, Dongsha uplift experienced the evolution from carbonate ramp to carbonate platform in the process of sea level rise in the early-Miocene.
- East Pearl River Mouth Basin /
- Zhujiang Formation /
- carbonatite /
- sedimentary facies /
- sedimentary microfacies

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图 1 珠江口盆地地理位置及构造区划

Figure 1. Geographical location and tectonic map of Pearl River Mouth Basin

下载: 全尺寸图片幻灯片

图 2 珠江组碳酸盐岩微相类型

a—海绿石质灰泥岩/MF1, 含海绿石和抱球虫, 单偏光; b—生物碎屑粒泥岩/MF2-1, 颗粒为破碎的生物碎屑, 单偏光; c—珊瑚藻屑颗粒质泥岩/MF2-2, 主要由珊瑚藻屑和泥晶基质组成, 单偏光; d—红藻石粒泥岩/MF2-3, 颗粒主要为红藻石, 单偏光; e—含海绿石浮游有孔虫颗粒质泥岩/MF2-4, 单偏光; f—有孔虫珊瑚藻屑泥粒岩/MF3-1, 珊瑚藻屑极破碎, 单偏光; g—珊瑚藻屑有孔虫泥粒岩/MF3-2, 有孔虫保存完好, 单偏光; h—生屑珊瑚藻屑泥粒岩/MF3-3, 生物碎屑极细碎, 原始组构已难以辨别, 单偏光; i—珊瑚藻屑泥粒岩/MF3-4, 含少量亮晶胶结物, 单偏光; j—有孔虫泥粒岩/MF3-5, 主要为底栖有孔虫, 粒度不一, 单偏光; k—红藻石泥粒岩/MF3-6, 红藻石滩微相, 单偏光; l—苔藓虫泥粒岩/MF3-7, Cribrilaria sp.拟筛壁苔虫, 单偏光; m—珊瑚屑泥粒岩/MF3-8, 颗粒多为珊瑚破碎角砾, 单偏光; n—砂屑泥粒岩/MF3-9, 颗粒主要为内碎屑-砂屑, 单偏光; o—有孔虫藻屑颗粒岩/MF4, 粒间孔发育, 单偏光; p—珊瑚骨架岩/MF5-1, 六射珊瑚, 单偏光; q—珊瑚藻骨架岩/MF5-2, 藻架孔被亮晶方解石充填, 单偏光; r—红藻石粘结岩/MF6-1, 红藻石中片状包壳为有孔虫, 单偏光; s—苔藓虫粘结岩/MF6-2, Alveolaria sp.肺泡苔虫, 单偏光; t—海绵礁灰岩/MF7-1, 脑纹状海绵, 单偏光; u—灰质白云岩/MF7-1, 可见原岩组分为生屑泥粒岩, 岩屑薄片, 单偏光; v—细粉晶白云岩/MF7-2, 粉-细晶白云石, 镶嵌式接触, 岩屑薄片, 单偏光

Figure 2. Carbonate microfacies types in Zhujiang Formation

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图 3 惠州Y井珠江组沉积相综合柱状图

Figure 3. Comprehensive column of sedimentary facies in Zhujiang Formation about Well Y in Huizhou area

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图 4 珠江口盆地碳酸盐岩沉积模式图及各微相类型在沉积相序中的分布^[13~14]

FZ—标准相带;MF—研究区微相类型

Figure 4. Sedimentary model of Pearl River Mouth Basin and distributions of all types of microfacies in the sedimentary facies sequence

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表 1 珠江组及其相邻地层概况(据文献[9]修改)

Table 1. Stratigraphic profiles about Zhujiang Formation and the adjacent strata

参考文献(14)

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