Seismic geomorphology and depositional system of delta and terminal fan: A case study of the Neogene Shawan Formation in the Chepaizi Uplift,Junggar Basin,China |
| |
| Institution: | 1. College of Geosciences, China University of Petroleum, Beijing 102249, China;2. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China;1. Faculty of Geoscience, State Key Laboratory of Petroleum Resources and Processing, China University of Petroleum, Beijing 102249, China;2. College of Geosciences, China University of Petroleum, Beijing 102249, China;3. Key Laboratory of Tectonics and Petroleum Resources, China University of Geosciences, Ministry of Education, Wuhan 430074, Hubei, China;4. Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China;5. Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China;1. School of Energy Resources, China University of Geosciences (Beijing), No.29 Xueyuan Road, Haidian District, Beijing 100083, China;2. Zhanjiang Branch of China National Offshore Oil Corporation Ltd, Zhanjiang 524057, China;3. SINOPEC Exploration and Production Research Institute, Beijing 100083, China;1. Key Laboratory of Tectonics and Petroleum Resources (China University of Geosciences), Ministry of Education, Wuhan 430074, China;2. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China;3. Bureau of Economic Geology, The University of Texas at Austin, Texas, 78712, USA;4. School of Energy Resources, China University of Geosciences, Beijing 10083, China |
| |
| Abstract: | The mainpurpose of this article is to demonstrate the utility of stratal slice images for exploring the sequence stratigraphy and sedimentology of complex depositional systems. A seismic sedimentological study was performed to map sediment dispersal characteristics of the Neogene Shawan Formation in the Chepaizi Uplift of the Junggar Basin, China. The Chepaizi Uplift is developed on the Carboniferous igneous rock basement that lies at the western boundary of the Junggar Basin. The data sources primarily include lithology, well-logging and seismic data. In the main target strata, the Neogene Shawan Formation can be divided into three fourth-order sequences (SQN1s1, SQN1s2, and SQN1s3), and the sequence SQN1s1 is subdivided into three fifth-order sequences (SQN1s11, SQN1s12, and SQN1s13). Based on the established fine-sequence stratigraphic framework, the sedimentary facies types have been identified, they are shallow braided-river deltas, fan deltas, littoral and sublittoral lakes, braided rivers, and terminal fans. Then, stratal slices have been used to clearly depict the boundaries of sedimentary facies. Accurate results have been obtained that characterize braided river channels, terminal fans, littoral and sublittoral lake beaches, and subaqueous distributary channels in the braided-river delta front. Additionally, this seismic sedimentology study reflects variations in source area and evolution history. |
| |
| Keywords: | Seismic sedimentology Stratal slice Neogene Chepaizi Uplift Junggar Basin |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
