We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Identification of eolian sandstone in the Lulehe Formation of Maxian area, Qaidam Basin, and its sedimentary model.
- Authors
Jian-guo YIN; Hui GUO; Zhi-xiong WU; Ji-an SHI; Yi-wen JU; Ming-feng ZHANG
- Abstract
Based on data from cores, rock slices, scanning electron microscope, granularity, X-ray diffraction, porosity and permeability, and X-ray fluorescence, this paper makes a comparative analysis of lithology, sedimentary textures, mineral composition, major elements and permeability, and then proves that the cores of Lulehe Formation from Wells of Maxi 5, Maxi 6, Xiandong 1 and Xiandong 2 in Maxian area belongs to aeolian sandstones, existence of which is the first time to be revealed in the Lulehe Formation of the Qaidam Basin. These aeolian sandstones are brown yellow medium-fine sandstones with loose cementation. Compared with the waterlaid sedimentation, the aeolian sandstones have the characteristics of single lithology, thick sand layer, high compositional maturity, good roundness of quartz particles with surface textures of aeolian sand, and the particle size similar to modern aeolian sand. The aeolian sandstone is obviously distinguished from water-laid sedimentation in Zircon-kK-feldspar-plagioclase, A-CN-K ternary diagram, PCA analysis and MFW ternary diagram. In addition, according to the analysis of sedimentation and provenance, it is considered that aeolian sandstones are deposited in the transitional zone of the alluvial fan and alluvial plain, the sediments of which experience the process of re-transportation, sorting and re-deposition of wind. The sedimentary model can be widely applied to support the sedimentary and reservoir research during the process of petroleum exploration and development in the northern margin of Qaidam Basin.
- Subjects
SANDSTONE; X-ray fluorescence; PETROLEUM prospecting; ALLUVIAL fans; SCANNING electron microscopes; ALLUVIAL plains; SEDIMENTATION analysis
- Publication
Natural Gas Geoscience, 2020, Vol 31, Issue 6, p6
- ISSN
1672-1926
- Publication type
Article
- DOI
10.11764/j.issn.1672-1926.2020.03.003