The Karst Caves Feature and Main Controlling Factors in Xekar Area, Tarim Basin
详细信息
- 责任者：Li Baogang (Research Institute of Petroleum Exploration and Development ; PetroChina ; Beijing 100083 ; China) ; Jia Chengzao
- 刊名：Xinjiang Petroleum Geology
- 出版年：2013
- 卷期：34(3)
- 关键词：碳酸盐岩储集层 ; carbonate reservoirs ; 塔里木盆地 ; Tarim Basin
- 页码：p.247-250
- 图表：illus., 10 refs.
- 分类号：1003
- issnNo：ISSN1001-3873
- isbnNo：CN65-1107/TE
摘要
The palaeokarst is widespread in carbonate outcrops in Xekar area of Tarim basin.In this paper,four types of palaeokarsts such as tubular branching type,cavern group type,plate type and single isolated type are presented.The tubular branching palaeokarst is con trolled by underground streams,like slim tube,long and thin branches,most lineally distributing in higher locations of northwestern part of Xekar anticline,and less than 3 meters apart from the top of carbonate rocks.The cavern group palaeokarst is controlled by ground water ta bles and underground streams,like a sheet,distributing in the higher positions of the northwestern and central north of the anticline,easily filled by calcites and fluorites.The plate type is controlled by along layer corrosing interlayer water,mostly found in the central south part of it,or linearly occurring in the cliffs of both sides of ravine,relatively lower in position,with distance larger than 10 meters from the top of the carbonate rocks,and normally filled by rust or light green siltstone or clastic rock.The single isolated type is controlled by faults and fractures,appearing funnel shape or inverted funnel shape in cross section,dispersely distributing and found in lower part of the anticline.