Experimental Study on the Thermal Response Characteristics of Porosity in Sandstone

作者：Yuan Gao, Jianxin Bai, Zhiguang Zhu, Xingxing Wang, Dong Huang, Jian Jiao · 发表于：Scientific Journal of Technology · 年份：2025 · DOI：10.54691/f5r53587 · 研究领域：Drilling and Well Engineering、Rock Mechanics and Modeling、Hydraulic Fracturing and Reservoir Analysis

The pore structure of sandstone directly influences its physical and mechanical properties as well as its fluid seepage capacity, with temperature being a key factor in altering this structure. This study simulates thermal effects by heating sandstone samples in a muffle furnace to explore the evolution patterns of sandstone porosity under different temperatures. Standard sandstone samples were primarily selected, prepared, and then heated isothermally at various temperatures. Porosity was measured based on the physical process where non-wetting liquid, driven by pressure, overcomes surface tension to infiltrate pores. This research provides crucial experimental evidence for understanding the damage mechanisms in sandstone reservoirs under thermal stress and offers guiding significance for engineering practices such as oil-type gas management.