The Effect of Provenance Intersection on the Petroleum Enrichment——An Example from Chang-6 Member in Huaqing Area of Central Ordos basin
详细信息
- 责任者：Liao Jianbo (Northwest Branch ; Research Institute of Petroleum Exploration and Development ; PetroChina ; Lanzhou 730020 ; China) ; Li Zhiyong
- 刊名：Xinjiang Petroleum Geology
- 出版年：2013
- 卷期：34(1)
- 关键词：油气聚集 ; oil and gas accumulation ; 物源分析 ; provenance analysis ; 砂体 ; sand bodies ; 鄂尔多斯盆地 ; Ordos Basin
- 页码：p.20-23
- 图表：illus., 15 refs.
- 分类号：1003
- issnNo：ISSN1001-3873
- isbnNo：CN65-1107/TE
摘要
Through the seismic and geological researches of the provenance and rocks properties in Huaqing area in central Ordos basin,it is recognized that there exist two provenances in northeast(Yinshan) and southwest directions in this area.The former controls the distribution of Chang-6 deposit system of Huaqing area as a main source,and its source area’s metamorphic property and rapid accumulation allow the sandstone to be characterized by high content of feldspar and debris as well as low maturity of component and structure.The latter is controlled by Qinling-Qilian mountains fold belt,with relatively weak effect on this area as a secondary source,and characterized by quartz content higher than feldspar and high maturity of component and structure of sedimentary rocks.Such two provenance systems are intersected along Baima-Wujiao area in the southwestern Huaqing,which takes an important controlling part in distribution of the deposit system where the effect on hydrodynamic regime results in unconspicuous differentiation of sedimentary facies in this intersection area.Also,the intersections between different sources and deposit system have obvious isolation and control effects on the hydrocarbon enrichment in this area.