Characteristics and Genetic Models of the Underwater Crevasse Splay in Yingtai Region
详细信息
- 责任者：Chen Guoxun (Exploration and Development Research Institute of Daqing Oilfield Company Ltd. ; Daqing 163712 ; China)
- 刊名：Petroleum Geology & Oilfield Development in Daqing
- 出版年：2011
- 卷期：30(4)
- 关键词：三角洲 ; deltas ; 冲积扇 ; alluvial fans ; 砂体 ; sand bodies ; 松辽平原 ; Songliao Plain
- 页码：p.22-25
- 图表：3 illus., 14 refs.
- 分类号：1003
- issnNo：ISSN1000-3754
- isbnNo：CN23-1286/TQ
摘要
For the problem that the development well pattern is not match well with the sand bodies in Yingtai region, the geneses and characteristics of the underwater crevasse-splay sand bodies are studied on the basis of the observation and analyses of a large number of cores. The identifying markers of the underwater crevasse-splay sandbodies are described, and meanwhile integrating with the hydrodynamic analysis, the development process of the underwater splay is divided into three stages： occurrence, stability, and shrink. Finally, accord to the different sequence characteristics of the three stages, the typical sedimentary sequence models of the underwater crevasse-splay sandbodies are summed up. As a result, a number of underwater crevasse splays are identified by the above models, so the geological phenomena of the widespread distribution of sand bodies, but poor connectivity and complex oil-water relations are explained, so the identification of the underwater crevasse splay is very important for the design optimization of the development well patterns.