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- Title
层序演化对三角洲-滩坝沉积体系有利储层 类型与分布的控制作用 --以四川盆地中部侏罗系凉高山组为例
- Authors
张天舒; 陶士振; 吴因业; 杨家静; 庞正炼; 杨晓萍; 陈燕燕; 袁苗; 刘敏; 范建玮; 冯荣昌
- Abstract
Lianggaoshan Formation is the main target tight oil layer. Lianggaoshan Formation deposited a set of delta- beach bar sedimentary system,and the beach-bar reservoir had strong heterogeneity. The purpose of this paper was to reveal the controlling factors on favorable facies and their distribution of tight oil reservoirs in the sequence stratigraphic structures. Detailed information has been acquired through analyses of cores,outcrops, well logs,thin sections of rocks,geochemical data,and geomorphological data. Conclusions are listed as follows. Firstly,the research indicates the distribution of sand beach bar is controlled by both lake-level changes and provenance,and beach-bars concentrate in the middle transgressive systems tract and early regressive systems tract. Secondly,shore-shallow lacustrine sand beach bar is refined into main body,margin,in-shore beach,and off-shore beach. Thirdly,based on the characteristics analyses of reservoir in different micro-facies, the distribution of favorable reservoir is controlled by micro-facies. The favorable reservoir is the main body of bar. Fourthly,the favorable reservoirs are finally zoned. The research work has defined the distribution of favor⁃ able reservoir in tight oil reservoirs,which is of guiding significance for the next exploration.
- Subjects
PETROLEUM reservoirs; SAND bars; SEQUENCE stratigraphy; PETROLEUM distribution; RESERVOIRS; PROVENANCE (Geology); SAND; FACIES
- Publication
Natural Gas Geoscience, 2019, Vol 30, Issue 9, p1286
- ISSN
1672-1926
- Publication type
Article
- DOI
10.11764/j.issn.1672-1926.2019.06.013