【摘要】 针对低渗透油藏注采比高的实际情况,建立考虑启动压力梯度和注采比因素的均质油藏不稳定渗流数学模型,并运用数值方法求解,绘制并分析了井底压力动态曲线。研究表明,启动压力梯度和注采比对不稳定压力动态影响较大。在低渗透油藏测试资料分析中考虑其影响是十分必要的。更多还原

【Abstract】 In accordance with the high injection - production ratio in low permeability reservoirs, a transient flow mathematical model for homogeneous reservoir has been established with consideration of threshold pressure gradient and injection - production ratio. The model can be solved by numerical method. Bottom hole pressure curves are provided and analyzed. The study shows that threshold pressure gradient and injection - production ratio have remarkable effect on transient pressure. It is necessary to consider these factors in well test analysis of low permeability reservoirs.更多还原