| 焦石坝五峰组-龙马溪组页岩硅质生物成因的证据及其地质意义 |
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| 引用本文： | 刘江涛,李永杰,张元春,刘双莲,蔡英杰. 焦石坝五峰组-龙马溪组页岩硅质生物成因的证据及其地质意义[J]. 中国石油大学学报(自然科学版), 2017, 0(1): 34-41 |
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| 作者姓名： | 刘江涛 李永杰 张元春 刘双莲 蔡英杰 |
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| 作者单位： | 页岩油气富集机理与有效开发国家重点实验室,北京 100101;中石化石油工程技术研究院,北京 100101,页岩油气富集机理与有效开发国家重点实验室,北京 100101;中石化石油工程技术研究院,北京 100101,页岩油气富集机理与有效开发国家重点实验室,北京 100101;中石化石油工程技术研究院,北京 100101,页岩油气富集机理与有效开发国家重点实验室,北京 100101;中石化石油工程技术研究院,北京 100101,页岩油气富集机理与有效开发国家重点实验室,北京 100101;中石化石油工程技术研究院,北京 100101 |
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| 基金项目： | 中国石化重点科技攻关项目(P13012) |
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| 摘 要： | 以页岩露头样品和钻井岩屑样品元素测量结果为依据,结合岩心和薄片观察,分析焦石坝五峰组-龙马溪组页岩的硅质生物成因的证据,并探讨其地质意义。结果表明:焦石坝五峰组—龙马溪组页岩中存在大量的笔石、角石、珊瑚等古生物化石和放射虫微体生物化石;SiO_2含量介于40%~80%,平均达63%;过量硅含量为2.6%~55.31%,其中五峰组和龙马溪组页岩下段过量硅含量较高,平均分别为41.3%和25.5%;Al/(Al+Fe+Mn)值介于0.62~0.87,与纯生物成因硅质岩相近,Al-Fe-Mn三角图上,研究区页岩样品绝大部分落在生物成因区,表明页岩硅质成分属于生物成因;深水陆棚贫氧、缺氧沉积环境有利于页岩有机质的富集和有机孔隙的发育,对于页岩天然裂缝的形成和后期人工压裂都具有重要意义。
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| 关 键 词： | 焦石坝 五峰组-龙马溪组 页岩 硅质生物成因 地质意义 |
| 收稿时间： | 2016-07-08 |
Evidences of biogenic silica of Wufeng-Longmaxi Formation shale in Jiaoshiba area and its geological significance |
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| LIU Jiangtao,LI Yongjie,ZHANG Yuanchun,LIU Shuanglian and CAI Yingjie. Evidences of biogenic silica of Wufeng-Longmaxi Formation shale in Jiaoshiba area and its geological significance[J]. Journal of China University of Petroleum (Edition of Natural Sciences), 2017, 0(1): 34-41 |
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| Authors: | LIU Jiangtao LI Yongjie ZHANG Yuanchun LIU Shuanglian CAI Yingjie |
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| Affiliation: | State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100101, China;SINOPEC Research Institute of Petroleum Engineering, Beijing 100101, China,State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100101, China;SINOPEC Research Institute of Petroleum Engineering, Beijing 100101, China,State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100101, China;SINOPEC Research Institute of Petroleum Engineering, Beijing 100101, China,State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100101, China;SINOPEC Research Institute of Petroleum Engineering, Beijing 100101, China and State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100101, China;SINOPEC Research Institute of Petroleum Engineering, Beijing 100101, China |
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| Abstract: | |
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| Keywords: | Jiaoshiba area Wufeng-Longmaxi Formation shale biogenic silica geological significance |
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