Review on Oil/gas Accumulation with Low Permeability in Ordos Basin
详细信息
- 责任者：Li Rongxi (School of Earth Sciences and Resources ; Chang’an University ; Xi’an 710054 ; China) ; Duan Lizhi
- 刊名：Journal of Earth Sciences and Environment
- 出版年：2011
- 卷期：33(4)
- 关键词：低渗透油气藏 ; low permeability reservoir ; 鄂尔多斯盆地 ; Ordos Basin
- 页码：p.364-372
- 图表：3 illus., 42 refs.
- 分类号：1003
- issnNo：ISSN1672-6561
- isbnNo：CN61-1423/P
摘要
Ordos Basin is the largest base for low permeable oil/gas exploration and development in China.The low permeable oil/gas accumulation in Ordos Basin featured with poor physical property,strong heterogeneity and complex factors controlling oil/gas accumulation and distribution.Based on reviewing and summarizing the history and experience of low permeability reservoir exploration in Ordos Basin,it indicated that there are two theory systems in studying low permeability reservoir formation at present.One is sedimentary controlling reservoir formation theory,which emphasizes that low permeability reservoir formation was controlled by sedimentary facies,heterogeneity and diagenesis;the other one is dynamics controlling reservoir formation theory,which focuses on oil/gas migration dynamics in primary migration and secondary migration.At present,it is insufficient to study low permeable oil/gas accumulation because traditional theories emphasize on single factor controlling oil/gas accumulation and corresponding exploration,which can not exactly reveal oil/gas accumulation principle and effectively guide exploration.Similarities and differences between low permeability reservoirs and conventional reservoirs should be paid attention.The sedimentary controlling reservoir formation theory limited to divide sedimentary facies and to establish depositional model;it emphasized on the controls of sedimentary factors to oil/gas accumulation,and ignored the dynamic properties of hydrocarbon accumulation process.Dynamics controlling reservoir formation theory overemphasizes the modeled and formulistic oil/gas fluid migration;it exaggerated and optionally explained the role of oil/gas migration and accumulation record(oil/gas inclusion) and its original geological significance,and ignored the complex of oil/gas migration and the multiplicity of oil/gas inclusion record.It is important to study reservoir geological record and reservoir formation history to summarize oil/gas accumulation principle and to provide important data for oil and gas exploration.