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Fractal characteristics and controlling mechanisms of deep tight sandstone pores in the Pen-1 Well West Sag, Junggar Basin

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Randomized trial evaluates fractal pore structure in deep tight sandstone, indicating mineral control on porosity and permeability.

This research examines the fractal characteristics and controlling mechanisms of deep tight sandstone pores in the Junggar Basin.
Utilized petrographic analysis, X-ray diffraction, scanning electron microscopy, high-pressure mercury injection experiments, and fractal theory.
Focused on the Yan Group of tight sandstone reservoirs at the Pen-1 Well West Sag.
Conducted systematic geological analysis to characterize the pore structures.
Pore structure fractal dimension ranged from 2.00 to 2.75, indicating high complexity and heterogeneity.
Significant negative correlation between fractal dimension and porosity/permeability; positive correlation with drainage pressure and median saturation pressure.
Mineral composition was a key controlling factor, with quartz negatively correlated and feldspar positively correlated with fractal dimension.

Ceng et al. (2026) studied this question.

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