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- Title
鄂尔多斯盆地延长气田Y113—Y133天然气井区盒8段致密储层物性下限 陈佳1(),封从军1(),俞天军2,陈刚2,唐明明2,孙萌思3 .
- Authors
陈佳; 封从军; 俞天军; 陈刚; 唐明明; 孙萌思
- Abstract
The lower limit of physical property and distribution of tight reservoir in the 8th Member of Permian Shihezi Formation (He 8 Member) of Yanchang Gas Field in Ordos Basin are clarified, which can provide theoretical basis for tight gas exploration and development in Yanchang Gas Field. The lower limit of physical properties of tight reservoir in He 8 Member of Y113-Y133 gas well area in Yanchang Gas Field, Ordos Basin was studied by comprehensive application of core, logging and gas test data. The results show that He 8 Member in the study area is mainly lithic sandstone, the interstitial materials are mainly hydromica and siliceous, and the types of pores are primary pores and secondary pores, with the latter predominating. Comprehensive use of empirical statistics, mercury injection method and gas test method, and through the establishment of physical property model, maximum pore-throat radius and physical property fitting and production dynamic data inspection, the lower limit of physical property of He 8 tight reservoir is determined as follows: The porosity is 5% and the permeability is 0.06×10-3 μm², corresponding displacement pressure is 1.7 MPa, median pressure is 20 MPa, and maximum pore throat radius is 300 nm. On this basis, the effective reservoir can be divided into three types: Type Ⅰ reservoir with the best physical and gas-bearing properties is the most favorable reservoir located in the center of the channel, Type Ⅱ reservoir is the best reservoir, and Type Ⅲ reservoir is the worst reservoir located at the edge of the channel.
- Subjects
NATURAL gas prospecting; GAS wells; ILLITE; TEST methods; GAS injection; GAS condensate reservoirs
- Publication
Natural Gas Geoscience, 2022, Vol 33, Issue 6, p955
- ISSN
1672-1926
- Publication type
Article
- DOI
10.11764/j.issn.1672-1926.2022.02.003