Conditions and Mechanism of Hydrocarbon Accumulation in Large Reef-Bank Karst Oil/Gas Fields of Tazhong Area, Tarim Basin
详细信息
- 责任者：Yang Haijun (Research Institute of Petroleum Exploration and Development ; Tarim Oilfield Company ; PetroChina ; Korla 841000 ; China) ; Zhu Guangyou
- 刊名：Acta Petrologica Sinica
- 出版年：2011
- 卷期：27(6)
- 关键词：油气藏形成 ; reservoir formation ; 成藏模式 ; pool-formed model ; 塔里木盆地 ; Tarim Basin
- 页码：p.1865-1885
- 图表：15 illus., 2 tables, 47 refs.
- 分类号：1003
- 出版序号：1035
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
///The Tazhong area is the main exploration and petroleum-rich area of Tarim Basin. Lianglitage Formation of Ordovician was controlled by Tazhong No.I slope-break zone, and developed shelf margin reef-shoal reservoir with the character of low porosity to ultra-low porosity and low permeability, which the buried depth was between 4 500 to 6 500 m. By the analysis of accumulation process, it’s confined there were three main accumulation periods in Tazhong area, the first accumulation period was Late Caledonian. The second accumulation period was Late Hercynian. The third accumulation period was Late Himalayan. During Late Himalayan period, the crude-oil-cracking gas which generated from Cambrian reservoir accumulated in shallow Ordovician along the deep fault, transformed the oil reservoirs into condensate gas reservoirs with large-scale distribution.