Sedimentary Characteristics and Shale Gas Significance of Lower Cambrian Black Shale in Qianbei Area
详细信息
- 责任者：Liang Chao (School of Energy Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Jiang Zaixing
- 刊名：Fault-Block Oil and Gas Fields
- 出版年：2012
- 卷期：19(1)
- 关键词：黑色页岩 ; black shale ; 页岩气 ; shale gas ; 贵州 ; Guizhou Province
- 页码：p.22-26
- 图表：4 illus., 13 refs.
- 分类号：1003
- issnNo：ISSN1005-8907
- isbnNo：CN41-1219/TE
摘要
On the theoretical basis of sedimentology,sequence stratigraphy,oil and gas geology,to the analysis of measured field profiles,geochemical elements and microscopically slice observation as the means,and using the trinity method of point-line-face,this article analyzes the sedimentary characteristics of Qianbei Area.The sedimentary environment of Lower Cambrian Niutitang Formation is shelf deposition and the main sedimentary systems include shallow shelf and deepwater shelf.Overall,the paleogeomorphology has the characteristics of high in northwest and low in southeast.Provenances come mainly from the northwest and a few from the southwest in research area.The Lower Cambrian black shale develops widely.The thickness of the black shale is biggest in southeast area,reaching 200 m.From macroscopic view,the black shale extensively develops,the thickness is very large and its color is pure.From microscopic view,the black shale gas is rich in organic matter and the microscopic silicon content is high.Combined with the macro and micro respects,it is considered that the southeast area is the key area for shale gas exploration.
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