超低渗透油藏合理流压确定方法

Determination of reasonable flowing pressure in ultra-low permeability reservoir

针对超低渗透油藏储层存在启动压力梯度和应力敏感性等特征,对已有油井流入动态方程进行修正。修正的油井流入动态曲线方程可用于不同流动压力下油井流入动态的计算,为超低渗透油藏开发方案的编制提供可靠的理论依据。同时,研究中还给出了油井最低允许流动压力的计算公式,分析了油井最低允许流动压力的影响因素。

Based on the characteristic of threshold pressure gradient and the stress sensitivity in ultra low permeability reservoir, and so on, the well inflow performance was amended. The amended well inflow performance adapt to the calculating the inflow performance and provides the academic base. While the research shows the calculating formula of well minimal flowing pressure and the influence factors.