双河油田泡沫复合驱数值模拟研究方法

Numerical simulation of foam compound flooding in Shuanghe oilfield

传统的泡沫驱数值模拟方法有机理法和经验法两种。机理法运算速度慢,经验法不能体现泡沫的生成与破灭等反应机理。为了提高泡沫驱数值模拟的计算速度,并体现注气量、半衰期等参数在泡沫驱中的作用,将机理法和经验法充分结合起来,具体阐述泡沫复合驱在数值模拟软件中的体现,并进行室内岩心驱替实验,来验证模型的可靠性,且在双河油田Eh3Ⅳ^1-3层系进行了效果预测。结果表明,泡沫复合驱数值模拟模型的采出程度与实验值相对误差为-4.54%,双河油田Eh3Ⅳ^1-3层系泡沫复合驱效果预测提高采收率10.24%。

There are two traditional numerical simulation methods of foam compound flooding: mechanism method and empirical method. The mechanism method is slow in operation, while the empirical method cannot reflect the reaction mechanism such as the formation and bursting of bubbles. In order to improve the calculation speed of numerical simulation of foam compound flooding, and reflect the role of parameters such as gas injection volume and half-life in foam compound flooding, this paper combines mechanism method and experience method, describes the embodiment of foam compound flooding in numerical simulation software in detail, conduct the indoor core displacement experiment to verify the reliability of the model, and predict the effect in Eh3 IV^1-3 of Shuanghe oilfield. Numerical simulation results show that the relative error between recovery degree of the numerical simulated model by foam compound flooding and the experimental values is-4.54%, and the recovery of Eh3 IV^1-3 is predicted to be enhanced 10.24%.