We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
鄂尔多斯盆地东部本溪组一段泥页岩元素地球化学特征.
- Authors
崔晨光; 张辉; 刘文香; 李仕芳; 刘燕; 宋换新; 吴陈君; 文志刚
- Abstract
The Carboniferous Benxi Formation shale is an important target interval for shale gas exploration in the Upper Paleozoic in the central and eastern Ordos Basin. On the basis of its representative field profile, drilling core system observation and sampling analysis, using the analyticaldata of major and trace elements, combined with the test data of the whole rock mineral composition, organic carbon content, organic microscopic composition, and so on, the palaeoclimate, water environment and the relationship with the development of organic-rich mud shale during the sedimentary period of the First Member of Benxi Formation in the eastern Ordos Basin are studied. The results show that the shale in the First Member of Benxi Formation of the study area is mainly clayey shale and siliceous shale, and quartz and clay minerals are absolutely dominant in the mineral composition; the CIA, Sr/Cu, and C value parameters indicate that the sedimentary period of the first member is mainly hot characteristics of wet paleoclimate; Sr content, Sr/Ba, Ba/Ga and other parameters indicate that the salinity of the sedimentary water in the upper and lower sub-members of the member is saline water, saline water-brass water, respectively,indicating that the water body salt in the late depositional period of this member was at relatively high degree;V/(V+Ni), Ceanom,Th/U and other parameters indicate that the water body in this sedimentary period was dominated by anoxic-poor oxygen environment. The hot and humid paleo-climate, the saline anoxic-poor sedimentary water environment and other good organic matter preservation conditions are favorable factors for the development of organic-rich shale in this section, especially the upper subsection. The development of high-quality shale provides a good foundation for shale gas exploration in the study area.
- Subjects
OIL shales; CORE drilling; NATURAL gas prospecting; SHALE gas; SALINE waters; TRACE elements; SAPROPEL
- Publication
Natural Gas Geoscience, 2022, Vol 33, Issue 6, p1001
- ISSN
1672-1926
- Publication type
Article
- DOI
10.11764/j.issn.1672-1926.2021.12.009