Effect of reservoir rock wettability on microcosmic distribution of residual oil after gas displacement

Yongfei Yang, Jun Yao, M. I J van Dijke

    Research output: Contribution to journalArticle

    Abstract

    Gas injection is one of the most important methods to enhance oil recovery. The rock wettability of reservoir has a great effect on gas displacement efficiency. Based on a three-dimensional pore-scale network model, the distribution and displacement efficiencies of gas injection in six reservoirs with different wettability were investigated using the pore-scale flow modeling method. The results show that gas injection efficiency in water-wet and mixed-wet small (small pores are oil-wet) reservoirs is poorer than that in oil-wet, intermediate-wet, mixed-wet large (large pores are oil-wet) and fractionally-wet (30% of pores is water-wet) systems.

    Original languageEnglish
    Pages (from-to)467-470
    Number of pages4
    JournalShiyou Xuebao/Acta Petrolei Sinica
    Volume31
    Issue number3
    Publication statusPublished - May 2010

    Keywords

    • Gas injection efficiency
    • Gas-driven reservoir
    • Residual oil distribution
    • Rock wettability
    • Three-dimensional pore network model

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