Quantitative characterization of complex multi-scale fractures in low-permeable sandstone reservoir: Insights from geological and mathematical approach
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Abstract
Abstract Natural fractures are regarded as important reservoir space and seepage channels in low-permeable sandstone reservoirs. Taking the complex multi-scale fractures of the Xujiahe Formation in the YB area as a case study, the characteristics and controlling factors are analyzed using data from multi-scale observations, including core samples, thin sections, and field outcrops. Multi-scale fracture distribution is predicted through a combination of geological analysis, fractal theory, and rock fracture theory. Specifically: (1) It is dominated by tectonic shear fractures of high angle (45°–75°) and vertical (75°–90°), the fracture density (D) in sandstone is higher than mudstone, negatively correlated with…
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Keywords
- Characterization (materials science)
- Relation (database)
- Reservoir modeling
- Component (thermodynamics)
- Mathematical model
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