Control on Cap Rock Seal Capacity by Sequence Style in Middle-Upper Yangtze Region
详细信息
- 责任者：Zhou Yan (Exploration & Production Research Institute ; SINOPEC ; Beijing 100083 ; China) ; Peng Yongmin
- 刊名：Petroleum Geology & Experiment
- 出版年：2011
- 卷期：33(1)
- 关键词：地层格架 ; stratigraphic framework ; 盖层 ; cap rocks ; 扬子地区 ; Yangtze Region
- 页码：p.28-33
- 图表：4 illus., 3 tables, 12 refs.
- 分类号：1003
- issnNo：ISSN1001-6112
- isbnNo：CN32-1151/TE
摘要
The marine strata in the middle-upper Yangtze region can be divided into 3 types: T, H and TH. Different sequence style has different effect on accumulation.Cap rock deposition and evolution are mainly controlled by the H style. As to muddy cap formations, the cap rocks in the 2nd grade transgression system tracts (TST) of the H style are good in quality. For gypsum cap formations, the cap rocks in good quality mainly locate in the 2nd grade highstand system tracts (HST) of the H style, which has experienced fast transgression and slow regression. It illustrates that the seal capacity of muddy cap rocks in transgression system tracts is better than that in high-stand system tracts.