Diagenetic Reservoir Facies and Diagenetic Evolutionary Sequences of Extra-Low Permeability Reservoir in Xu4 Formation of Fenggu Structure in Western Sichuan Province
详细信息
- 责任者：Lin Yu (College of Geosciences ; China University of Petroleum ; Changping 102249 ; China) ; Xu Zhangyou
- 刊名：Journal of Daqing Petroleum Institute
- 出版年：2011
- 卷期：35(2)
- 关键词：低渗透储集层 ; low permeability reservoirs ; 成岩作用 ; diagenesis ; 四川盆地 ; Sichuan Basin
- 页码：p.1-8
- 图表：9 illus., 1 table, 11 refs.
- 分类号：1003
- issnNo：ISSN1000-1891
- isbnNo：CN32-1297/TE
摘要
The reservoir of Xu4 Formation in Fenggu Structure of western Sichuan Depression belongs to the low porosity and extra-low permeability reservoir. Research has been carried out about the reservoir’s diagenesis, diagenesis stage, diagenetic reservoir facies and diagenetic evolution sequence on the basis of analysis assay data. The diagenetic-reservoir facies are divided into 4 types. The formation conditions of the relic primary intergranular pores and secondary dissolution pores in the reservoirs are different due to their different diagenetic evolutionary sequences. The preservation of pores in reservoir is mainly controlled by the rock components, compaction of pores, the filling of authigenic minerals and the multi-stages dissolution, as well as the injection of acid fluid.