川东—武陵山地区下寒武统牛蹄塘组页岩有机质富集模式

周磊; 王宗秀; 李会军; 张林炎; 张凯逊; 梁明亮

doi:10.12090/j.issn.1006-6616.2018.24.05.062

川东—武陵山地区下寒武统牛蹄塘组页岩有机质富集模式

doi: 10.12090/j.issn.1006-6616.2018.24.05.062

周磊^{1, 2,},
王宗秀^{1, 2, ,},
李会军^{1, 2},
张林炎^{1, 2},
张凯逊^{1, 2},
梁明亮^{1, 2}

1.
中国地质科学院地质力学研究所, 北京 100081
2.
中国地质科学院页岩油气评价重点实验室, 北京 100081

基金项目:

博士后基金项目 2018M631541

中国地质调查局项目 DD20160183

中国地质科学院基本科研业务费项目 JYYWF20181201

详细信息

作者简介:
周磊(1987-), 男, 博士, 从事页岩沉积环境和储层表征研究。E-mail:zhoulei4010@126.com

通讯作者:
王宗秀(1959-), 男, 博士, 教授, 从事大地构造和非常规油气研究。E-mail:wangzongxiu@sohu.com

中图分类号: P618.13;P622
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- 文章访问数: 341
- HTML全文浏览量: 124
- PDF下载量: 23
- 被引次数: 0
出版历程
- 收稿日期: 2018-05-04
- 修回日期: 2018-07-25
- 刊出日期: 2018-10-01

ACCUMULATION PATTERN OF ORGANIC MATTER IN SHALES OF THE LOWER CAMBRIAN NIUTITANG FORMATION, CHUANDONG-WULINGSHAN AREA

ZHOU Lei^{1, 2
,},
WANG Zongxiu^{1, 2
, ,},
LI Huijun^{1, 2},
ZHANG Linyan^{1, 2},
ZHANG Kaixun^{1, 2},
LIANG Mingliang^{1, 2}

1.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China
2.
Key Lab of Shale Oil and Gas Geological Survey, Chinese Academy of Geological Sciences, Beijing 100081, China

摘要

摘要: 有机质富集、保存对页岩气资源评价、勘探选区和开发具有重大的指导意义。以川东—武陵山地区下寒武统牛蹄塘组页岩为例，利用岩石地球化学、油气地球化学和沉积岩石学方法和技术对牛蹄塘组有机质丰度、有机质来源及古环境演化进行了分析，对川东—武陵山地区页岩有机质富集和保存条件进行了评价。结果表明：牛蹄塘组页岩有机质主要来自于蓝藻、红藻、褐藻等自生海洋藻类；相比于牛蹄塘组高位体系域，在牛蹄塘组海侵体系域页岩沉积期，温暖湿润的古气候和大规模海侵使得海平面快速上升，海侵导致深水陆棚、斜坡甚至部浅水陆棚处于贫氧—缺氧环境，该深水贫氧—缺氧还原环境（部分硫化还原环境）有利于有机质保存，在川东—武陵山地区上形成大面积富有机质页岩。
- 有机质 /
- 富集模式 /
- 页岩 /
- 牛蹄塘组 /
- 川东—武陵山地区
Abstract: The accumulation and preservation of organic matter have great guiding significance for the evaluation of oil and gas reservoirs and the survey and exploration of targeting exploration area. Based on the technologies and methods of lithogeochemistry, petroleum geochemistry and sedimentology, the richness and source of organic matter and paleoenviroment evolution of the Lower Cambrian Niutitang Formation in Chuandong-Wulingshan area were analyzed. The enrichment and preservation conditions of organic matter were evaluated preliminarily. The results show that planktonic algae (including blue-green algae, rhodophyta and phaeophyta) are the primary producers of organic matter. Compared with the upper domain of Niutitang Formation, during the deposition period of transgression, the warm and humid paleoclimate and large-scale transgression made the sea level rise rapidly, and the transgression caused deep continental shelf, slope and even shallow continental shelf to be in an oxygen-deficient or anoxic environment. This deep water oxygen-deficient and anoxic reduction environment (partial sulfide reduction environment) is favorable for the preservation of organic matter, and a large area of organic-rich shales were formed in the area of Chuandong-Wulingshan area.
- organic matter /
- accumulation model /
- shale /
- Niutitang Formation /
- Chuandong-Wulingshan area

HTML全文

图 1 川东—武陵山地区岩茨塘剖面、走马剖面牛蹄塘组页岩有机碳含量

Figure 1. The variations of TOC contents of the Niutitang Formation shales from Yancitang (YCT) and Zouma (ZM) field sections in Chuandong-Wulingshan Area

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图 2 川东—武陵山地区牛蹄塘组页岩饱和烃气相色谱图

Figure 2. Saturated hydrocarbon gas chromatogram of the Niutitang Formation shales in Chuandong-Wulingshan Area

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图 3 川东—武陵山地区牛蹄塘组页岩甾烷质量色谱图(m/z 217)

Figure 3. Representative m/z 217 mass chromatograms of the Niutitang Formation shales in Chuandong-Wulingshan Area

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图 4 川东—武陵山地区牛蹄塘组页岩萜烷质量色谱图(m/z 191)

Figure 4. Mass chromatograms of terpane in Niutitang Formation shales in Chuandong-Wulingshan Area (m/z 191)

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图 5 川东—武陵山地区走马剖面牛蹄塘组古气候和古盐度演化特征

Figure 5. Evolution characteristics of paleo-climate and paleo-salinity of the Niutitang Formation shales from ZM field section in Chuandong-Wulingshan Area

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图 6 川东—武陵山地区岩茨塘剖面牛蹄塘组古气候和古盐度演化特征

Figure 6. Evolution characteristics of paleo-climate and paleo-salinity of the Niutitang Formation shales from YCT field section in Chuandong-Wulingshan Area

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图 7 川东—武陵山地区牛蹄塘组页岩V/Cr、Ni/Co和TOC关系图

Figure 7. Relations between Ni/Co, V/Cr and TOC contents for the Niutitang Formation shales in Chuandong-Wulingshan Area

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图 8 川东—武陵山地区牛蹄塘组页岩Mo/Al、U/Al、V/Al和TOC关系图

Figure 8. Relations between Mo/Al, U/Al, V/Al and TOC contents for the Niutitang Formation shales in Chuandong-Wulingshan Area

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图 9 走马剖面页岩氧化还原敏感元素比(元素对Al标准化，×10^-4)

Figure 9. Distributions ZM field section with selected ratios and Al-normalized trace element concentrations (×10^-4)

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图 10 岩茨塘剖面页岩氧化还原敏感元素比(元素对Al标准化，×10^-4)

Figure 10. Distributions YCT section with selected ratios and Al-normalized trace element concentrations (×10^-4)

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图 11 川东—武陵山地区牛蹄塘组页岩有机质富集模式图

Figure 11. Accumulation pattern of organic matter in shales from Niutitang Formation in Chuandong-Wulingshan Area

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