| 川东北上二叠统长兴组白云岩地球化学特征及形成机制 |
| |
| 引用本文： | 赵锐,吴亚生,齐恩广,姜红霞.川东北上二叠统长兴组白云岩地球化学特征及形成机制[J].古地理学报,2014,16(5):747-760. |
| |
| 作者姓名： | 赵锐 吴亚生 齐恩广 姜红霞 |
| |
| 作者单位： | 1.中国科学院油气资源研究重点实验室,北京 100029;2.中国科学院地质与地球物理研究所,北京 100029;3.中国石油大学(北京)石油工程教育部重点实验室,北京 102249 |
| |
| 基金项目： | 国家自然科学基金重点-中石化联合基金项目，国家自然科学基金项目 |
| |
| 摘 要： | 四川盆地东北部长兴组储集层主要由细—中晶白云岩组成,其次为微晶白云岩。根据薄片观察、阴极发光、电子探针分析发现,细—中晶白云岩与微晶白云岩在阴极发光特征方面很相似,都不发光,且在Mg、Ca、Fe、Mn、Sr和Ba含量方面也没有区别。根据上述分析结果认为,研究区的细—中晶白云岩是微晶白云岩在准同生期重结晶形成的,控制重结晶的主要因素是引起准同生白云石化的蒸发卤水下渗。这一认识为确定研究区白云岩储集层的空间分布提供了新的思路。
|
| 关 键 词： | 四川盆地 上二叠统 长兴组 白云岩 白云石化 |
| 收稿时间： | 21 October 2013 |
Geochemistry and origin of dolomites of the Upper Permian Changxing Formation in northeastern Sichuan Basin |
| |
| Zhao Rui,Wu Yasheng,Qi Enguang,Jiang Hongxia.Geochemistry and origin of dolomites of the Upper Permian Changxing Formation in northeastern Sichuan Basin[J].Journal of Palaeogeography,2014,16(5):747-760. |
| |
| Authors: | Zhao Rui Wu Yasheng Qi Enguang Jiang Hongxia |
| |
| Institution: | 1.Key Laboratory of Petroleum Resources Research,Chinese Academy of Sciences, Beijing.100029;2.Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing.100029;3.MOE Key Laboratory of Petroleum Engineering,China University of Petroleum(Beijing),Beijing.102249 |
| |
| Abstract: | The Changxing Formation reservoir in northeastern Sichuan Basin is mainly composed of fine to medium sized crystalline dolomites,and some mud sized crystalline dolomites secondly. Observation of thin sections under cathodoluminescence reveals that the fine-medium sized crystalline dolomites and mud sized crystalline dolomites look very dark. Micro-probe analysis reveals that the Mg,Ca,Fe,Mn,Sr,Na and Ba content is constant from the core of the fine-medium sized crystalline dolomite crystals to their margins,thus it is speculated that the fine-medium sized crystalline dolomites are transformed from previous mud sized crystalline dolomites by recrystallization in penecontemporaneous period. The main factor controlling the recrystallization is the infiltration high-Mg brine caused by evaporation which provides new ideas for determining the reservoir distribution of dolomites in the study area. |
| |
| Keywords: | Sichuan Basin Upper Permian Changxing Formation dolostone dolomitization |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《古地理学报》浏览原始摘要信息 |
| 点击此处可从《古地理学报》下载免费的PDF全文 |
|
