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| 洞庭盆地沅江凹陷古近系沅江组下段烃源岩特征 | |
| 引用本文： | 郭峰,蒲秀刚,郭岭. 洞庭盆地沅江凹陷古近系沅江组下段烃源岩特征[J]. 四川地质学报, 2010, 30(2): 198-201 |
| 作者姓名： | 郭峰 蒲秀刚 郭岭 |
| 作者单位： | 1. 西安石油大学油气资源学院,西安,710065 2. 中国石油大港油田公司,天津,300280 3. 中国地质大学地质过程与矿产资源国家重点实验室,北京,100083 |
| 摘 要： | 根据大量钻井取心样品的测试分析结果，综合分析了沅江凹陷古近系沅江组下段烃源岩的分布、有机质类型、丰度、成熟度等。研究表明，沅江凹陷古近系沅江组下段烃源岩分布面积约1383km^2，累计厚度50～125m，平均80m左右，横向分布比较稳定。烃源岩有机质丰度的三项指标都比较低，分布范围局限，较好烃源岩标准的地区，主要位于东、西两个次凹的沉积中心部位；烃源岩有机质类型为腐殖一腐泥型。根据镜质体反射率、孢粉颜色指数、族组分以及正构烷烃色谱特征等分析，古近系沅江组下段的烃源岩属于成熟阶段。 |
| 关 键 词： | 古近系 烃源岩 有机质 沅江凹陷 |
Characteristics of Source Rock of the Lower Member of Paleogene Yuanjiang Formation in the Yuanjiang Depression, Dongting Basin |
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| GUO Feng,PU Xiugang,GUO Ling. Characteristics of Source Rock of the Lower Member of Paleogene Yuanjiang Formation in the Yuanjiang Depression, Dongting Basin[J]. Acta Geologica Sichuan, 2010, 30(2): 198-201 | |
| Authors: | GUO Feng PU Xiugang GUO Ling |
| Affiliation: | 1-College of Oil-Gas Resources, Xi＇an Petroleum University, Xi＇an 710065; 2-Dagang Oilfield Ltd. Company, PetroChina Company Limited, Tianjin 300280; 3- National Key Laboratory for Geological Process and Mineral Resources, China University ofGeosciences, Beijing 100083) |
| Abstract: | The present paper deals with distribution of source rock, type, abundance and maturity of organic matter of the Lower Member of the Paleogene Yuanjiang Formation in the Yuanjiang depression. The study indicates that area of the source rock is about 1383 km^2 with a thickness of 50-125 m and average thickness of about 80 m. Good source rock is distributed over east and west depression centers. Organic matter belongs to humic and sapropel type. The source rock is in mature stage on the basis of vitrinite reflectance, sporopollen analysis and so on. |
| Keywords: | Paleogene source rock organic matter Yuanjiang depression |
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