Assessing Ancient Marine Carbonate Plays in China
详细信息
- 责任者：Wang Zecheng (Petroleum Exploration and Development Research Institute ; PetroChina ; Beijing 100083 ; China) ; Li Zongyin
- 刊名：Natural Gas Industry
- 出版年：2013
- 卷期：33(6)
- 关键词：碳酸盐岩油气藏 ; carbonate reservoir ; 中国 ; China
- 页码：p.7-15
- 图表：illus., 1 table, 29 refs.
- 分类号：1003
- issnNo：ISSN1000-0976
- isbnNo：CN51-1179/TE
摘要
Geologic conditions of ancient marine carbonate plays in China are very complex.During play fairway mapping,it is common to focus only on the recognition of exploration targets(traps or reservoirs),but to neglect other elements(such as source rocks) concerning hydrocarbon reservoiring,leading to the failure of exploration in some areas.To solve these problems,the geologic conditions of the deep marine carbonate plays in petroliferous basins including Tarim and Sichuan were systematically analyzed for establishing a solid basis of study.By taking a play as an important assessment unit of the ancient marine carbonate reservoirs in China,we performed research on source rock conditions,reservoir conditions,and source rock & reservoir rock combination.The ancient marine carbonate plays are divided into two groups,namely syntectonic cycle plays and conjunct tectonic cycle plays according to the source-reservoir rock combinations.A reservoir type is both an important parameter for the evaluation of marine carbonate plays and a major basis for the subdivision of plays.As to the carbonate plays dominated by stratigraphic-lithologic traps,it is proposed to name them as "a reservoir horizon plus reservoir type".Finally,the features of carbonate plays were discussed by taking the Ordovician reservoirs in the Ordos Basin as an example.Four plays can be recognized in the Ordovician Majiagou Fm in this basin.Among these plays,the M55(the fifth interval of the 5th member of Majiagou Fm)-M510(the tenth interval of the 5th member of Majiagou Fm) play is the most favorable one in terms of geologic conditions,thus it is a major exploration target in the future.