Evolutionary of Faults and Their Control on Fractures in Buried Hill in Beier Depression
详细信息
- 责任者：Sun Yonghe (Geoscience College ; Daqing Petroleum Institute ; Daqing 163318 ; China) ; Wan Jun
- 刊名：Petroleum Exploration and Development
- 出版年：2007
- 卷期：34(3)
- 关键词：断裂 ; fractures ; 潜山油气藏 ; buried-hill reservoir ; 海拉尔盆地 ; Hailar Basin
- 页码：p.316-322
- 图表：8 illus., 14 refs.
- 分类号：1003
- issnNo：ISSN1000-0747
- isbnNo：CN11-2360/TE
摘要
The developing and evolving characteristics of faults in Beier Sag show that faulting controls fractures in buried hills. The fracture development is influenced by the faulting activities in the late depositional periods of the Budate Group, Nantun and Yimin Formations. In the late depositional period of the Yimin Formation, faulting activities make early-formed closed fractures open and form new opening fractures in the buried hills. The direction of fractures is closely related to the directions of faults. Fractures nearby NNE tenso-shear faults develop in the direction of NNE, those nearby NEE tenso-shear faults develop both NEE and NWW, and those in the area controlled by both NEE and NNE faults develop complicatedly. The development of fractures is controlled by their density. The favorable areas of opening fractures in the buried hills are basculating fault zones formed at the end of the Yimin Formation deposition as a result of faulting activities.