CO_2泡沫蒸汽驱油藏适应性研究

Research on the Adaptability of Carbon Dioxide Foam Steam Drive for oil reservoir

根据胜利地质条件,利用数值模拟方法,采用半经验模型,研究了CO2泡沫蒸汽驱对油藏的适应性。研究结果表明:CO2泡沫蒸汽驱对不同韵律地层都有较好的适应性,更适用于正韵律地层;油藏深度是影响开发效果的重要因素,采用CO2泡沫蒸汽驱技术的油藏埋深下限为1400m;地层连通性好的地层,开发效果较好;该开发方式对于非均质性地层和不同粘度的油藏都有非常良好的适应性。所得结果对于现场应用具有借鉴和指导作用,为我国处于蒸汽驱的稠油油藏提供了一种有效的开发技术。

Base on the geological conditions of heavy reservoir in shengli oilfield,Numerical simulation method was applied to study the adaptability of carbon dioxide foam steam drive for oil reservoir.In the numerical simulation,semi-empirical prediction model was adopted.The results showed that this development mode was suitable for different rhythm formation and more suitable for positive rhythm formation.reservoir depth was the important factor affecting development effect and the critical depth was about 1400m.The formation connectivity was more,the development effect was better.To the heterogeneous formation and different viscosity reservoir,it had good adaptability.The research result of this paper had reference and guidance function to field application,provided an effective developing technology for steam driving reservoir.