本文对某油藏间歇注水、注气模拟进行了研究。分别模拟了连续注水和连续注气方案，并将其结果与间歇注水和注气的结果进行了比较。采用CMG软件进行油藏模拟，使用Builder建立机理模型，WinProp建立流体模型用GEM模拟器模拟强化采油过程。结果表明，4:2周期注入方案的采收率和累积产量大于其他方案，注气周期大于注水周期时，开发效果更好。在WAG方法中，先注水后注气比先注气后注水的产量高。与其他WAG方式相比，IWAG产量更高，IWAG的微观和宏观驱替效率更高。WAG方法的累积产量高于常规只注水或注气生产方式。
Simulation of Water and Gas Injection in an Oil Reservoir Intermittently
Abstract
In this paper, Simulation of water and gas injection was examined in an oil reservoir intermittently. Scenarios of water injection and gas injection were simulated separately and their results were compared with each other and with intermittent water and gas injection. CMG software was used in this article for reservoir simulation. Builder tool was used to make physical model and WinProp for making fluid model, and GMT simulator for making simulation of enhanced oil recovery processes. The results show that the coefficient of productivity and cumulative production is more than other scenarios of injection in the injection cycle of 4: 2. Investigations in the field of study show that the productivity coefficient will be more if the period of gas injection be higher than water. In WAG method if injection of gas to be done sooner than water (water phase as a secondary fluid be injected to the reservoir), production and efficiency increase compared to the state that injection of water earlier and as a first fluid be injected to the reservoir. Higher efficiency and production in IWAG method, compared to the other injection WAG methods show higher movement of sweep whether microscopic and macroscopic, and higher efficiency in this method compared to other methods of injection. Productivity coefficient and cumulative production of WAG method is higher compared to normal production methods, water and gas injection, therefore this method was introduced as an optimal enhanced oil recovery in the field of study.
Keywords：Reservoir simulation, Intermittent injection of water and gas, Water injection, Gas injection, Enhanced oil recovery, CMG software
