Factors Controlling Reef-Bank Reservoirs in the Changxing-Feixianguan Formations in the Sichuan Basin and Their Play Fairways
详细信息
- 责任者：Wen Long (Exploration and Development Research Institute ; Southwest Oil & Gasfield Company ; PetroChina ; Chengdu 610041 ; China) ; Zhang Qi
- 刊名：Natural Gas Industry
- 出版年：2012
- 卷期：32(1)
- 关键词：碳酸盐岩储集层 ; carbonate reservoirs ; 油气勘探 ; petroleum exploration ; 四川盆地 ; Sichuan Basin
- 页码：p.39-44
- 图表：3 illus., 16 refs.
- 分类号：1003
- issnNo：ISSN1000-0976
- isbnNo：CN51-1179/TE
摘要
///Based on the comparative analysis of various well data and 3D seismic sections,the impact of various factors is studied on the geometry of the Kaijiang-Liangping trough and the distribution of reef-banks,such as the Late Permian regional palaeogeomorphologic framework,tectonic extension,system tracts of the Changxing-Feixianguan formations.The following conclusions were drawn: 1) at the end of Late Permian,the palaeogeomorphologic framework of the Sichuan Basin was “three depressions separated by three uplifts”; 2) the unevenness of extension caused the differences in the angles of slope on platform margin around the Kaijiang-Liangping trough; 3) the evolution of sequences reveals that transgressive systems tract(TST) deposits dominated the Longtan period and highstand system tract(HST) deposits dominated the mid-late Changxing period; and 4) the change of system tracts made it possible to develop multistage reefs near the platform margin.