Sedimentary Characteristics and Evolution Model of the Jurassic Badaowan Formation in the Dishuiquan Area in Eastern Junggar Basin
详细信息
- 责任者：Wang Zhe (College of Geosciences ; China University of Petroleum ; Beijing 102249 ; China) ; Jin Zhenkui
- 刊名：Natural Gas Geoscience
- 出版年：2013
- 卷期：24(2)
- 关键词：砂体 ; sand bodies ; 沉积演化 ; sedimentary evolution ; 准噶尔盆地 ; Junggar Basin
- 页码：p.282-291
- 图表：illus., 20 refs.
- 分类号：1003
- issnNo：ISSN1672-1926
- isbnNo：CN62-1177/TE
摘要
Based on the analyses of regional geology,core,logging and seismic data,the sedimentary characteristics,distribution features of sedimentary facies and the sedimentary evolution model of Dishuiquan area are examined.The results show that the study area mainly develops three sedimentary facies including braided river,braided river delta and lacustrine,five types of sedimentary subfacies including braided channel,floodplain,braided river delta plain,braided river delta front and shore-shallow lacustrine,and nine types of sedimentary microfacies including channel,channel bar,wetland,distributary channel,underwater distributary channel,tributary bay,mouth bar,distal bar and shore-shallow lacustrine mud.Based on sedimentary characteristics and deposits distribution,an evolutionary model with braided river-lake-braided river delta facies integrated is proposed.In the depositional period of J1b1,the source came from Kelameili Mountain in the northeast,and it developed large area of gravel braided rivers to the south and west.In the depositional period of J1b2,the lacustrine transgressive onlapped from southwest to northeast,the lakes could reach the ancient denudation area,and it developed large area of lacustrine sediments.In the depositional period of J1b3,tectonic activity were intensive and source supply was abundant.Large amounts of clastic sediments came into the Dishuiquan area from Kelameili Mountain and it developed braided river delta.Jurassic strata in Junggar basin are characterized by "groove alternating with roof;shallow water in wide basin;wide-spreading river and restricted fan;multi-source and gentle slope".