Sedimentary Characteristics of Flood Debris Flow and Traction Current in the Lower Shihezi Formation of Permian in the Northern of Ordos Basin(PDF)
《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]
- Issue:
- 2014年第03期
- Page:
- 21-30
- Research Field:
- 基础地质与矿产地质
- Publishing date:
Info
- Title:
- Sedimentary Characteristics of Flood Debris Flow and Traction Current in the Lower Shihezi Formation of Permian in the Northern of Ordos Basin
- Author(s):
- ZHANG Zong-lin; TIAN Jing-chun; LUO Xiang-jian; ZHANG Jin-quan
- 1. Changqing Oilfield Company, PetroChina, Xi’an 710018, Shaanxi, China; 2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, Sichuan, China
- Keywords:
- lithofacies; flood debris flow; traction current; Lower Shihezi Formation; Permian; Sulige gas field; Ordos Basin
- PACS:
- P618.13;TE121.3
- DOI:
- -
- Abstract:
- He-8 section of the Lower Shihezi Formation of Permianin Su76 and Su77 blocks of Sulige gas field, the northern Ordos Basin was taken as an example; lithofacies type and superimposed relation during the sedimentary evolution of the lower section of He-8 in the Lower Shihezi Formation of Permian were discussed by the means of petrographic analysis,and the characteristics of sedimentary facies were analyzed. According to the detail observation and description of rock cores from 38 exploration wells in the study area, two types of sedimentary lithofacies formed by flooding debris flow and traction current were identified. The lithofacies formed by traction current includes orthoconglomerate lithofacies supported by grain, coarse sandstone lithofacies with gravel, sandstone lithofacies and mudstone lithofacies with silty because of traction current; the lithofacies formed by flooding debris flow includes paraconglomerate lithofacies supported by matrix, coarse sandstone lithofacies with gravel and mudstone lithofacies with silty because of flooding. Different combination types of lithofacies are vertically superimposed because of the lithofacies formed by the two types of sedimentation. The combination types reflect that wet alluvial fan develops during the deposition period of flooding debris flow, and braided river develops during the deposition period of traction current in the lower section of He-8, Su76 and Su77 blocks. Gravelly diara, gravelly sandy diara and sandy diara develop in braided channel, and it is favorable to forming reservoir sand bodies.
Last Update: 2014-09-30