【摘要】 针对凝析油气田开发的特殊情况和混相驱与非混相驱开发油田的实际需要，引进化工热力学理论，考虑粘滞力、重力和毛管力的作用，用有限差分方法建立了一个三维三相的全组份模型，并对一个凝析气田的气体回注开采过程进行了模拟计算，效果很好．该模型也已应用于安塞油田枰桥区Ⅳ类储量注气开发可行性试验研究，结果证明，该模型合理，精度高，功能全，运算速度快，使用方便．更多还原

【Abstract】 On the basis of theory of chemical engineering thermodynamics,a full compositional three phase 3D model was established by the finite differnce method so as to meet the needs of the development in condensate fields,miscible flooding fields and immiscible flooding fields.In the model,the functions of viscous force,gravity and capillary force are taken in consideration.The model was used for the simulation calculation of the recovery by gas reinjection in a condensate field and for the recovery feasibility research of the fourth reserve by gas injection in Pingqiao Area of Ansai Oilfield.The calculation results show that the model is reasonable,its functions are complete,its accuracy and effiency of calculation are high,and it ′s convenient to use.更多还原