摘要
通过对鄂尔多斯盆地西南缘三岔—演武地区野外调查和地震剖面分析 ,用断层相关褶皱理论对油气储集构造进行了研究。提出在盆地西南缘由断层转折褶皱形成油气圈闭构造的两种类型 :(1)缺失前翼膝折带的断层转折褶皱 ;(2 )
Based on the investigation in the field and seismic profiles, we applied the theory of fault related fold in analyzing the traps of petroleum and natural gas in the southwestern margin of Ordos Basin. As a result, two types of fault bend folds which are suitable for traps of petroleum and natural gas were recogniged, namely: (1) fault bend folds without fore kink bands and (2) full structural fault bend folds. It is demonstrated that the two kinds of fault bend folds are commonly existing in Sancha-Yanwu district of southwestern Ordos Basin and there are petroleum and natural gas traps in this area. By analyzing the geometry and kinematics of fault bend folds, the range of traps is estimated. Another important side of using this method is to judge the tectonic stress. The main parts of the area are covered by loess layer and the base rocks are seldom exposed on the surface, especially the lower layers are fewly exposed. The authors made a preliminary analysis for the folds and faults in the basin on the fault bend folds theory. It offers new ideas for the exploration of petroleum and gas, as well as a new method for the research of basemental geology.
出处
《高校地质学报》
CAS
CSCD
2001年第3期272-277,共6页
Geological Journal of China Universities
基金
高等学校博士学科点专项科研基金资助课题 (批准号 :19990 2 8437)
