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采用先进的可视化气驱物理模拟研究手段,设计出直径为6 cm,长度为60 cm的高温、高压钢管填砂模型,模拟地层条件下枯竭油藏改建储气库注采运行;分析了储层物性对储气库库容的影响;测定多次注采后油气水饱和度的变化,研究多次循环注气、采气过程中的气液渗流特征及对注采气能力的影响。研究结果表明:枯竭油藏改建储气库多次注采,既能提高原油采收率,又能增加储气库库容。
Using advanced visualized physical modeling of gas flooding research, we design a high temperature and high pressure steel pipe sandblasting model with a diameter of 6 cm and a length of 60 cm to simulate the injection and run-off of depleted reservoirs in stratum. The influence of physical property on the storage capacity of gas storage; the change of oil-gas water saturation after multiple injection and production was measured; the gas-liquid percolation characteristics during multi-cycle gas injection and gas recovery and the influence on gas injection and gas production capacity were studied. The results show that the multiple recovery and recovery of gas reservoirs in depleted reservoirs can not only improve the recovery rate of crude oil but also increase the storage capacity of gas reservoirs.