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Multicomponent Shale Oil Flow in Real Kerogen Structures via Molecular Dynamic Simulation

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  • Jie Liu

    (Key Laboratory of Unconventional Oil and Gas Development, China University of Petroleum (East China), Ministry of Education, Qingdao 266580, China
    Research Centre of Multiphase Flow in Porous Media, School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China)

  • Yi Zhao

    (Exploration and Development Research Institute of PetroChina Southwest Oil and Gas Field Company, Chengdu 610041, China)

  • Yongfei Yang

    (Key Laboratory of Unconventional Oil and Gas Development, China University of Petroleum (East China), Ministry of Education, Qingdao 266580, China
    Research Centre of Multiphase Flow in Porous Media, School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China)

  • Qingyan Mei

    (Exploration and Development Research Institute of PetroChina Southwest Oil and Gas Field Company, Chengdu 610041, China)

  • Shan Yang

    (Exploration and Development Research Institute of PetroChina Southwest Oil and Gas Field Company, Chengdu 610041, China)

  • Chenchen Wang

    (Hubei Cooperative Innovation Centre of Unconventional Oil and Gas, Yangtze University, Wuhan 430100, China)

Abstract

As an unconventional energy source, the development of shale oil plays a positive role in global energy, while shale oil is widespread in organic nanopores. Kerogen is the main organic matter component in shale and affects the flow behaviour in nanoscale-confined spaces. In this work, a molecular dynamic simulation was conducted to study the transport behaviour of shale oil within kerogen nanoslits. The segment fitting method was used to characterise the velocity and flow rate. The heterogeneous density distributions of shale oil and its different components were assessed, and the effects of different driving forces and temperatures on its flow behaviours were examined. Due to the scattering effect of the kerogen wall on high-speed fluid, the heavy components (asphaltene) increased in bulk phase regions, and the light components, such as methane, were concentrated in boundary layers. As the driving force increased, the velocity profile demonstrated plug flow in the bulk regions and a half-parabolic distribution in the boundary layers. Increasing the driving force facilitated the desorption of asphaltene on kerogen walls, but increasing the temperature had a negative impact on the flow velocity.

Suggested Citation

  • Jie Liu & Yi Zhao & Yongfei Yang & Qingyan Mei & Shan Yang & Chenchen Wang, 2020. "Multicomponent Shale Oil Flow in Real Kerogen Structures via Molecular Dynamic Simulation," Energies, MDPI, vol. 13(15), pages 1-12, July.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:15:p:3815-:d:389475
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    References listed on IDEAS

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    1. Travis, Karl P. & Todd, B.D. & Evans, Denis J., 1997. "Poiseuille flow of molecular fluids," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 240(1), pages 315-327.
    2. J. David Hughes, 2013. "A reality check on the shale revolution," Nature, Nature, vol. 494(7437), pages 307-308, February.
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    Cited by:

    1. Sun, Hai & Li, Tianhao & Li, Zheng & Fan, Dongyan & Zhang, Lei & Yang, Yongfei & Zhang, Kai & Zhong, Junjie & Yao, Jun, 2023. "Shale oil redistribution-induced flow regime transition in nanopores," Energy, Elsevier, vol. 282(C).

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