Forming Conditions and Depositional Characteristics of Shallow-Water Deltas in Depression Basins: A Case Study of K2y1 in the South of Songliao Basin
详细信息
- 责任者：Wang Liwu (Jilin Oil Field ; CNPC ; Songyuan ; Jilin 138001 ; China)
- 刊名：Acta Sedimentologica Sinica
- 出版年：2012
- 卷期：30(6)
- 关键词：三角洲沉积作用 ; deltaic sedimentation ; 浅水环境 ; shallow-water environment ; 松辽平原 ; Songliao Plain
- 页码：p.1053-1060
- 图表：3 illus., 24 refs.
- 分类号：0803,1003
- issnNo：ISSN1000-0550
- isbnNo：CN62-1038/P
摘要
In this paper,forming conditions and deposition characteristics of K2y1 shallow-water deltas in the southern Songliao basin has been analyzed.Songliao basin are characterized by stable structure,slow subsidence,flat palaeotopography,dry climate and sufficient material source during Putaohua Formation,thus formed a distinctive shallow-water delta deposition.Unlike conventional terrigenous basins,its shoreline often migrated in large scale and few deep lacustrine and semi-deep lacustrine facies developed. During K2y1 deposition period,the base level increased gradually,I and II sand group provided a favorable reservoir storage space,III sand group transgress provided a good seal for Putaohua reservoir.