Journal
FRONTIERS IN PHYSICS
Volume 10, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fphy.2022.838954
Keywords
digital core; sandstone; pore structure; pore radius distribution; pore analysis
Categories
Funding
- Open Funds of Engineering Research Center of Development and Management for Low to Ultra-Low Permeability Oil and Gas Reservoirs in West China [KFJJ-XB-2020-3]
- Young Science and Technology Talents Foundation of Shaanxi Province [2019KJXX-054]
- Shaanxi Province Key Research and Development Plan [2021GY-140]
- National Natural Science Foundation of China [51874240, 51934005, 52074226]
- Open Fund of Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Natural Resources [KF2021-3]
- Open Fund of Shaanxi Key Laboratory of Advanced Stimulation Technology for Oil and Gas Reservoirs [20JS120]
- Doctoral Research Initiation Fund [6040300529]
- Youth Foundation of Xian University of Architecture and Technology [60405170 45]
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This study investigates the influence of pore geometry on pore analysis using digital cores. The results show that pore analysis based on digital cores differs significantly from experimental results, mainly due to limitations of scanning resolution, quality, pore extraction method, and experimental errors.
A digital core obtained without damage and contact can provide intuitive and quantitative analysis data for sandstone pore structure analysis. However, pore analysis results based on digital cores are quite different from experimental results due to limitations of scanning resolution, quality, pore extraction method, and experimental errors. In this research, the influence of pore geometry on pore analysis is studied from pore angles and pore resolution. First, sharp angles are extracted by image processing, and the influence of angles on pore radius distribution is analyzed. Then, by up-down sampling, high- and low-resolution digital cores are reconstructed, and the effects of resolution on pore connectivity and throat structure are discussed.
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