Most gas reservoirs in the Sichuan Basin are water-driven gas reservoirs, with significant differences in recovery rates between different reservoirs. It is of great significance to clarify the factors affecting the recovery rate of water-drive gas reservoirs for increasing production and stabilizing production in such reservoirs. This study established a water-drive gas reservoir model considering different displacement energies and different structures, and used reservoir numerical simulation software to simulate and calculate the recovery rate under different influencing factors. Common influencing factors in the development of water-drive gas reservoirs, such as water-drive energy and reservoir structure, were systematically analyzed, and their impact on recovery rate was discussed. Finally, by comparing the changes in recovery rate under different influencing factors, some enlightening conclusions were drawn, providing a theoretical basis and reference for the optimization development of water-drive gas reservoirs. This study has certain guiding significance for the efficient development of water-driven gas reservoirs.

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Numerical Simulation on Recovery Factor of Water-Driven Gas Reservoirs

  • Fang Li,
  • Hang Quan

摘要

Most gas reservoirs in the Sichuan Basin are water-driven gas reservoirs, with significant differences in recovery rates between different reservoirs. It is of great significance to clarify the factors affecting the recovery rate of water-drive gas reservoirs for increasing production and stabilizing production in such reservoirs. This study established a water-drive gas reservoir model considering different displacement energies and different structures, and used reservoir numerical simulation software to simulate and calculate the recovery rate under different influencing factors. Common influencing factors in the development of water-drive gas reservoirs, such as water-drive energy and reservoir structure, were systematically analyzed, and their impact on recovery rate was discussed. Finally, by comparing the changes in recovery rate under different influencing factors, some enlightening conclusions were drawn, providing a theoretical basis and reference for the optimization development of water-drive gas reservoirs. This study has certain guiding significance for the efficient development of water-driven gas reservoirs.