Evidence of Exposure Erosion of Lower-Middle Ordovician Top in Beiweixie Region, Middle Tarim Basin
详细信息
- 责任者：Ma Qingyou (Research Institute of Exploration and Production ; Northwest Company ; SINOPEC ; Urumqi 830011 ; China) ; Sha Xuguang
- 刊名：Petroleum Geology & Experiment
- 出版年：2013
- 卷期：35(5)
- 关键词：碳酸盐岩储集层 ; carbonate reservoirs ; 剥蚀作用 ; denudation ; 塔里木盆地 ; Tarim Basin
- 页码：p.500-504
- 图表：4 illus., 3 tables, 18 refs.
- 分类号：1003
- issnNo：ISSN1001-6112
- isbnNo：CN32-1151/TE
摘要
Whether there was exposure erosion of the Lower- Middle Ordovician top in Beiweixie region of the middle Tarim Basin,it is critical to identify the controlling factors for reservoir development and exploration direction in the study area. Through the analyses of the reflection characteristics of new 3d seismic profile,R o thermal evolution profile of drilled well,and δ13C,δ18O isotopes of fracture-filling calcites,it is concluded that the Lower- Middle Ordovician top may have suffered various degrees of exposure erosion in Beiweixie region under the action of the episode Ⅰ of the mid-Caledonian. Denudation degree increases approaching to the Tazhong No. Ⅰ fault belt,which enhances the oil and gas exploration potential of weathering crust karst areas of the episodeⅠof the midCaledonian in the study area.
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