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Abstract To better understand the quality of the heterogeneous reservoir and gas accumulation in tight sandstone reservoirs, it is necessary to reveal the internal relationship between the reservoir qualities, pore… Click to show full abstract
Abstract To better understand the quality of the heterogeneous reservoir and gas accumulation in tight sandstone reservoirs, it is necessary to reveal the internal relationship between the reservoir qualities, pore structure and gas migration. In this study, we employ integrated methods including geological data analysis, casting thin section, SEM, XRD and Micro-CT (μ-CT) combined with physical simulation experiments of gas migration for the Upper-Paleozoic Shanxi and Lower Shihezi formations in the Ordos Basin. The results reveal three main pore-throat structures in tight sandstone reservoir in Ordos basin, including the macro-meso pores (>10 μm) with medium throats (1–3 μm) (MMPMT), small pores (2–10 μm) with fine throats (0.5–1 μm) (SPFT) and the micro-nano pores (
Journal Title: Fuel
Year Published: 2019
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