Influence mechanism of pore-scale anisotropy and pore distribution heterogeneity on permeability of porous media

被引：0
|
作者：
Li T. [1 ]
Li M. [1 ]
Jing X. [2 ]
Xiao W. [1 ]
Cui Q. [3 ]
机构：
[1] State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu
[2] Sinopec Star Beijing New Energy Development Co., Ltd. Sichuan Branch, Chengdu
[3] No.1 Drilling Company of Sinopec Zhongyuan Petroleum Engineering Co., Ltd., Puyang
来源：
Shiyou Kantan Yu Kaifa/Petroleum Exploration and Development | 2019年 / 46卷 / 03期
关键词：
Influence mechanism; Permeability; Pore distribution; Pore-scale anisotropy; Specific surface area; Tight sandstone; Tortuosity;
D O I：
10.11698/PED.2019.03.15
中图分类号：
学科分类号：
摘要：
Based on micro-CT scanning experiments, three-dimensional digital cores of tight sandstones were established to quantitatively evaluate pore-scale anisotropy and pore-distribution heterogeneity. The quartet structure generation set method was used to generate three-dimensional anisotropic, heterogeneous porous media models. A multi-relaxation-time lattice Boltzmann model was applied to analyze relationships of permeability with pore-scale anisotropy and pore distribution heterogeneity, and the microscopic influence mechanism was also investigated. The tight sandstones are of complex pore morphology, strong anisotropy and pore distribution heterogeneity, while anisotropy factor has obvious directivity. The obvious anisotropy influences the orientation of long axis of pores and fluid flow path, making tortuosity smaller and flowing energy loss less in the direction with the greater anisotropy factor. The strong correlation of tortuosity and anisotropy is the inherent reason of anisotropy acting on permeability. The influence of pore distribution heterogeneity on permeability is the combined effects of specific surface area and tortuosity, while the product of specific surface area and tortuosity shows significantly negative correlation with heterogeneity. The stronger the pore distribution heterogeneity, the smaller the product and the greater the permeability. In addition, the permeability and tortuosity of complex porous media satisfy a power relation with a high fitting precision, which can be applied for approximate estimation of core permeability. © 2019, The Editorial Board of Petroleum Exploration and Development. All right reserved.
引用
收藏
页码：569 / 579
页数：10
相关论文
共 39 条
  • [1] Yang P., Wen Z., Dou R., Et al., Permeability in multi-sized structures of random packed porous media using three-dimensional lattice Boltzmann method, International Journal of Heat & Mass Transfer, 106, pp. 1368-1375, (2017)
  • [2] Ahmadi M.M., Mohammadi S., Hayati A.N., Analytical derivation of tortuosity and permeability of monosized spheres: A volume averaging approach, Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics, 83, 2, (2011)
  • [3] Zheng B., Li J., A new fractal permeability model for porous media based on Kozeny-Carman equation, Natural Gas Geoscience, 26, 1, pp. 193-198, (2015)
  • [4] Kozeny J., Ueber kapillare leitung des wassers im Boden, Sitzungsber, Sitzungsber Akad, 136, 2, pp. 271-306, (1927)
  • [5] Carman P.C., Fluid flow through granular beds, Chemical Engineering Research & Design, 75, 1, pp. 32-48, (1937)
  • [6] Ergun S., Fluid flow through packed columns, Chem. Eng. Prog., 48, 2, pp. 89-94, (1952)
  • [7] Mcgregor R., The effect of rate of flow on rate of dyeing Ⅱ: The mechanism of fluid flow through textiles and its significance in dyeing, Coloration Technology, 81, 10, pp. 429-438, (1965)
  • [8] Rumpf H., Gupte A.R., Influence of porosity and particle size distribution in resistance of porous flow, Chemie Ingenieur Technik, 43, pp. 33-34, (1971)
  • [9] Pape H., Clauser C., Iffland J., Variation of permeability with porosity in sandstone diagenesis interpreted with a fractal pore space model, Pure & Applied Geophysics, 157, 4, pp. 603-619, (2000)
  • [10] Rodriguez E., Giacomelli F., Vazquez A., Permeability- porosity relationship in RTM for different fiberglass and natural reinforcements, Journal of Composite Materials, 38, 3, pp. 259-268, (2004)
1234