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A Simplified Physical Model Construction Method and Gas-Water Micro Scale Flow Simulation in Tight Sandstone Gas Reservoirs

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  • Fengjiao Wang

    (Department of Petroleum Engineering, Northeast Petroleum University, Daqing 163318, China)

  • Yikun Liu

    (Department of Petroleum Engineering, Northeast Petroleum University, Daqing 163318, China)

  • Chaoyang Hu

    (Department of Petroleum Engineering, Northeast Petroleum University, Daqing 163318, China)

  • Anqi Shen

    (Department of Petroleum Engineering, Northeast Petroleum University, Daqing 163318, China)

  • Shuang Liang

    (Department of Petroleum Engineering, Northeast Petroleum University, Daqing 163318, China)

  • Bo Cai

    (Petrochina Exploration and Development Research Institute at Langfang, Langfang 065007, China)

Abstract

Accuracy defects exist when modeling fluid transport by the classical capillary bundle model for tight porous media. In this study, a three-dimensional simplified physical model construction method was developed for tight sandstone gas reservoirs based on the geological origin, sedimentary compaction and clay mineral-cementation. The idea was to reduce the porosity of the tangent spheres physical model considering the synergistic effect of the above two factors and achieve a simplified model with the same flow ability as the actual tight core. Regarding the wall surface of the simplified physical model as the boundary and using the Lattice Boltzmann (LB) method, the relative permeability curves of gas and water in the simplified model were fitted with experimental results and a synergistic coefficient could be obtained, which we propose for characterizing the synergistic effect of sedimentary compaction and clay mineral-cementation. The simplified physical model and the results simulated by the LB method are verified with the experimental results under indoor experimental conditions, and the two are consistent. Finally, we have carried out a simulation of gas flooding water under conditions of high temperature and high pressure which are consistent with the actual tight sandstone gas reservoir. The simulation results show that both gas and water have relatively stronger seepage ability compared with the results of laboratory experiments. Moreover, the interfacial tension between gas and water is lower, and the swept volume is larger during placement. In addition, the binding ability of the rock surface to the water film adhered to it becomes reduced. The method proposed in this study could indicate high frequency change of pores and throats and used to reflect the seepage resistance caused by frequent collisions with the wall in microscopic numerical simulations of tight sandstone gas reservoirs.

Suggested Citation

  • Fengjiao Wang & Yikun Liu & Chaoyang Hu & Anqi Shen & Shuang Liang & Bo Cai, 2018. "A Simplified Physical Model Construction Method and Gas-Water Micro Scale Flow Simulation in Tight Sandstone Gas Reservoirs," Energies, MDPI, vol. 11(6), pages 1-16, June.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:6:p:1559-:d:152458
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    References listed on IDEAS

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    1. Vesselin Krassimirov Krastev & Giacomo Falcucci, 2018. "Simulating Engineering Flows through Complex Porous Media via the Lattice Boltzmann Method," Energies, MDPI, vol. 11(4), pages 1-14, March.
    2. Yuwei Li & Lihua Zuo & Wei Yu & Youguang Chen, 2018. "A Fully Three Dimensional Semianalytical Model for Shale Gas Reservoirs with Hydraulic Fractures," Energies, MDPI, vol. 11(2), pages 1-19, February.
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    Cited by:

    1. Pengyu Wang & Zhiliang Wang & Linfang Shen & Libin Xin, 2018. "Lattice Boltzmann Simulation of Fluid Flow Characteristics in a Rock Micro-Fracture Based on the Pseudo-Potential Model," Energies, MDPI, vol. 11(10), pages 1-14, September.

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