| 中国南方五峰组-龙马溪组页岩中笔石与有机质富集关系探讨 |
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| 引用本文： | 邱振,董大忠,卢斌,周杰,施振生,王红岩,吝文,张晨晨,刘德勋.中国南方五峰组-龙马溪组页岩中笔石与有机质富集关系探讨[J].沉积学报,2016,34(6):1011-1020. |
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| 作者姓名： | 邱振 董大忠 卢斌 周杰 施振生 王红岩 吝文 张晨晨 刘德勋 |
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| 作者单位： | 1.中国石油勘探开发研究院 北京 100083; |
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| 基金项目： | 国家自然基金项目(41602119)，国家重点基础研究发展计划(973计划)项目(2013CB228001)[National Natural Science Foundation;No.41602119，National Key Basic Research Program of China(973 Program)，No.2013CB228001] |
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| 摘 要： | 中国南方奥陶纪-志留纪之交广泛沉积了以五峰组和龙马溪组为代表的笔石页岩。基于对重庆巫溪地区五峰组-龙马溪组底部页岩段中近400件页岩样品中笔石丰度的统计及100件页岩样品有机碳含量（TOC，%）的分析测试结果，选择其中23件不同笔石丰度与TOC的页岩样品开展页岩中笔石体与围岩（非笔石体部分）TOC的对比实验，并结合能谱分析测试结果，探讨笔石与有机质富集的关系。初步研究认为:①五峰组-龙马溪组页岩中笔石体的C、O等元素含量较高，其TOC明显高于围岩，是页岩有机质的贡献者之一；②五峰组-龙马溪组页岩全岩TOC与笔石丰度及笔石体TOC相关性均较差，而与围岩TOC相关性较好，这指示着页岩中笔石丰度对有机质富集影响较小。
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| 关 键 词： | 笔石 页岩气 五峰组 龙马溪组 有机质富集 巫溪地区 |
| 收稿时间： | 2016-05-20 |
Discussion on the Relationship between Graptolite Abundance and Organic Enrichment in Shales from the Wufeng and Longmaxi Formation,South China |
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| Institution: | 1.Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China;2.Langfang Branch, PetroChina Exploration and Development Research Institute, Langfang, Hebei 065007, China |
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| Abstract: | The graptolitic shales of the Wufeng and Longmaxi Formations were widely deposited across the Ordovician and Silurian transition in South China. Based on the statistics of graptolite abundance from nearly 400 shale samples and total organic content (TOC) from nearly 100 shale samples in the Ordovician-Silurian boundary succession in Wuxi area of Chongqing, 23 shale samples have been further selected to determine the contribution of the graptolite abundance to overall TOC. The energy spectrum analysis showed the C and O contents in the graptolites are higher than those in the host of Wufeng and Longmaxi shales, and the TOC of the graptolite is apparently higher than that of the surrounding host, showing the graptolite might be one of the contributors of organic matter in the shale. However, the overall TOC in shales generally has a poor correlation with the graptolite abundance in shales, implying that the graptolite abundance in shales has not a great impact on the organic enrichment. |
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| Keywords: | graptolite shale gas Wufeng Formation Longmaxi Formation organic enrichment Wuxi area |
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