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H区属于弱挥发性油藏,投入开发后地下流体脱气较严重,产液产油指数下降较快,室内试验结果表明,地层压力低于饱和压力后,脱气造成流体的粘度、渗透率变化幅度较大。本文通过相渗曲线变化探讨脱气前后油藏的无因次采液采油指数变化规律,对后期进一步深入分析脱气油藏的开发规律有一定的指导作用。
H zone belongs to the weak volatile oil reservoir. The degassing of underground fluid is more serious when it is put into development. The oil production index drops rapidly. The indoor test results show that after the formation pressure is lower than the saturation pressure, the viscosity and permeability of the fluid Changes in the larger. In this paper, the change rule of the dimensionless liquid production index before and after degassing is discussed through the phase change curve, which will guide the further development of degassing reservoir in the later period.