| 珠江口盆地惠州凹陷南部珠江组混合沉积作用 |
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| 引用本文： | 昌建波,邹晓萍,余国达,黄映仕.珠江口盆地惠州凹陷南部珠江组混合沉积作用[J].海相油气地质,2017,22(4). |
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| 作者姓名： | 昌建波 邹晓萍 余国达 黄映仕 |
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| 作者单位： | 中海石油(中国)有限公司深圳分公司 |
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| 基金项目： | 中国海洋石油总公司重大科技专项 "南海东部海域低孔低渗油气藏勘探开发关键技术研究与实践 ( |
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| 摘 要： | 珠江口盆地惠州凹陷南部珠江组下部广泛发育陆源碎屑岩与碳酸盐岩的混合沉积。通过测井、地震和岩心等资料综合研究了工区混合沉积的岩石学特征、沉积模式和分布规律。研究认为工区混合沉积可分为相缘混合和原地混合,相缘混合主要是在浅海三角洲相和碳酸盐岩台地相边界的结合部位、在低能水动力环境下的细粒陆源碎屑与泥晶碳酸盐的混合沉积,原地混合主要是在三角洲前缘高能水动力条件下的砂级硅质碎屑颗粒与碳酸盐生物碎屑的混合沉积。原地混合沉积对储层的储集性能和渗流特征有显著影响。描述了原地混合沉积的泥岩—碳酸盐岩—砂岩—碳酸盐岩—泥岩相层序,并讨论了陆源碎屑注入、古地形、海平面升降及三角洲迁移等影响透光带范围的因素是如何控制研究区的混合沉积分布的。
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| 关 键 词： | 混合沉积 三角洲前缘 生物礁 珠江组 惠州凹陷 珠江口盆地 |
Mixed Clastic and Carbonate Deposits of Zhujiang Formation in the Southern Huizhou Depression,Zhujiangkou Basin |
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| Chang Jianbo,Zou Xiaoping,Yu Guoda,Huang Yingshi.Mixed Clastic and Carbonate Deposits of Zhujiang Formation in the Southern Huizhou Depression,Zhujiangkou Basin[J].Marine Origin Petroleum Geology,2017,22(4). |
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| Authors: | Chang Jianbo Zou Xiaoping Yu Guoda Huang Yingshi |
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| Abstract: | Mixed clastic and carbonate deposits developed extensively in L levels of Zhujiang Formation in the southern Huizhou Depression, Zhujiangkou Basin. Based on seismic sections, drilling data, and core data, the lithological character, spacial distribution and depositional model are studied. The mixed deposits can be subdivided into two types, namely facies mixing and in-situ mixing. The facies mixing deposits the fine grain mixing of layers of siliciclastic shale and micritic carbonates in the overlapping boundary area between shallow marine delta and carbonate platform in a low-energy environment. The in-situ mixing deposits the sand-size particle mixing of siliciclastic sand and bioclastic limestone in a unique layer of delta front in a high-energy environment. The carbonate layers deposited by in-situ mixing play a complex role in the storage capacity and flow performance of reservoirs in L levels. The facies sequence of shale-carbonate-sand-carbonate-shale is identified in in-situ mixing. The factors such as input of terrigenous clastic deposits, paleo-topography, sea-level fluctuation and delta migration influenced the euphotic zone, and controlled the origin and distribution of clastic-carbonate mixing. |
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| Keywords: | Mixed deposit Delta front Zhujiang Formation Huizhou Depression Zhujiangkou Basin |
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