Internal Structures of Fault Zones and Their Relationship with Hydrocarbon Migration and Accumulation
详细信息
- 责任者：Chen Wei (College of Geo-Resources and Information ; China University of Petroleum ; Dongying 257061 ; China) ; Wu Zhiping
- 刊名：Acta Petrolei Sinica
- 出版年：2010
- 卷期：31(5)
- 关键词：断裂 ; fractures ; 油气运移 ; oil and gas migration
- 页码：p.774-780
- 图表：8 illus., 23 refs.
- 分类号：1003
- issnNo：ISSN0253-2697
- isbnNo：CN11-2128/TE
摘要
Development of faults and their internal structure changes exert great influence on oil-gas migration and accumulation in hydrocarbon-bearing basins. Quantitative analyses were carried out on internal structures by means of instruction curves and intersection mapping. The result revealed that fault zones were mainly composed of structural units with different deformation and properties in the central sliding breaking zones and the induced fracture zones on both the upper and lower plates, and there existed distinctly temporal and spatial differences in the internal structures of fault zones. Temporally, internal structures were different for the same fault but at different geological periods; spatially, fault zones had horizontal asymmetry, vertical stratification and segmentation along fault strike. These differences are just what that caused the heterogeneity of physical properties of different structural units within fault zones, which then makes temporal and spatial differences in abilities of hydrocarbon transporting and sealing by faults.