Evolution of Paleogene Saline Deposits and Effectiveness of Traps in Kelasu Tectonic Zone, Kuqa Depression, Tarim Basin
详细信息
- 责任者：Zhuo Qingong (Research Institute of Petroleum Exploration and Development ; PetroChina ; Beijing 100083 ; China) ; Li Yong
- 刊名：Petroleum Geology & Experiment
- 出版年：2013
- 卷期：35(1)
- 关键词：膏盐层 ; gypsum and salt succession ; 盖层 ; cap rocks ; 库车坳陷 ; Kuqa Depression
- 页码：p.42-47
- 图表：illus., 33 refs.
- 分类号：1003
- issnNo：ISSN1001-6112
- isbnNo：CN32-1151/TE
摘要
Saline deposits are good regional cap rocks in petroliferous basins,yet not perfect.Research shows that saline deposits are characterized by "embitterment at low temperature and plastic deformation at high tempera-ture".The sealing capacity of saline deposits changes with burial depth,and the depth from 3 000 to 3 200 m is critical to the capping effectiveness of saline deposits in the Kelasu tectonic zone.The effectiveness of subsalt trap accumulations is influenced by the evolution of saline deposits.The key time for the closing of cap rocks in the anti-cline zone of Kesalu is the middle and late Kuqa periods,and the main exploration targets are the complete anticline traps buried over 3 200 m deep.In the deep zone of Kelasu,the key time for the closing of cap rocks is the early and middle Kuqa periods,and petroleum may be trapped in subsalt blocks and broken anticlines when faults are laterally sealed.Research fits the status of exploration,and helps to improve exploration success rate.