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- Title
南方海相页岩物质组成与孔隙微观 结构耦合关系.
- Authors
李文镖; 卢双舫; 李俊乾; 张鹏飞; 陈 晨; 王思远
- Abstract
To explore the coupling relationship between material composition and pore microstructure, 30 marine shale samples with high-over maturity from the Wufeng and Longmaxi Formations, Southern China were analyzed by using nitrogen adsorption method. According to the shape of hysteresis, 3 types of shales are identified. The results show that clay mineral mainly develops slit pores ranging from micropore (<2nm) to macropore (>50nm), while organic matter mainly develops inkbottle pores with the size of mesopore (2-50nm). Whether in BET specific surface area (SSA) or total pore volume (PV), mesopores always makes the largest contribution. Micropores make the second largest contribution to the SSA, while macropores offer moderate PV. The SSA of microporeis mainly provided by organic matter, and clay minerals mainly contribute to the SSA of mesopores and macropores. Clay minerals mainly provide macropore volume, while organic matter mainly contributes to micropore and mesopore volume. The shale samples generally show three stages of fractal characteristics, and in the range of different pore size, the inkbottle pores are more complex than slit pores. The results are helpful to understand the law of gas accumulation and migration.
- Publication
Natural Gas Geoscience, 2019, Vol 30, Issue 1, p27
- ISSN
1672-1926
- Publication type
Article
- DOI
10.11764/j.issn.1672-1926.2018.10.001