Research on the characteristics of fluid mobility of the tight reservoir with the NMR fluid distribution pore classification method

Peng LIU, Bin PENG, RuiJiang YU, Ting LI, Hui GAO, Teng LI

Prog Geophy ›› 2025, Vol. 40 ›› Issue (1) : 294-303.

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Prog Geophy ›› 2025, Vol. 40 ›› Issue (1) : 294-303. DOI: 10.6038/pg2025HH0266

Research on the characteristics of fluid mobility of the tight reservoir with the NMR fluid distribution pore classification method

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Abstract

The Chang 8 tight sandstone reservoir is taken as the research object, and combining with the refined classification method of fluid distribution pore based on NMR fractal theory, the fluid motility of three different types of tight sandstone core samples were carried out to quantitatively characterize the fluid motility with the NMR tests. The experimental results show that the fluid motility of different types of cores is the result of the coupling of physical properties, lithological characteristics and microscopic pore inhomogeneity, and the fluid motility of larger pore sizes in cores significantly affects the fluid motility of cores; the fluid motility of different types of cores mainly occurs in P1-2 and P1-3 pores, and the amounts of these two types of pores and the amounts of their movable fluids determine the fluid motility of cores The pore structure coefficient and fluid motility coefficient have certain advantages in quantitative characterization of fluid motility, and the complexity of pore structure and fluid motility of P1-2 and P1-3 pores ultimately determine the fluid motility of cores.

Key words

Tight reservoir / Fluid mobility / Pore structure coefficient / Fluid mobility coefficient

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Peng LIU , Bin PENG , RuiJiang YU , et al . Research on the characteristics of fluid mobility of the tight reservoir with the NMR fluid distribution pore classification method[J]. Progress in Geophysics. 2025, 40(1): 294-303 https://doi.org/10.6038/pg2025HH0266

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