低渗透油藏非线性渗流下的油井产能

Oil well productivity of non-linear flow in low-permeability oil reservoirs

针对低渗透油田的特点,通过理论分析和室内实验研究,得到了低渗透岩心的非线性渗流特征、油水井间的压力分布公式以及油井的产量公式,并与非达西线性渗流对比,发现非线性渗流的油井指示线不是直线,而是曲线并且在全程的渗流过程中压力消耗都很大.此外,在相同的渗流条件下,非线性渗流的压力消耗在渗流的全程都比非达西线性渗流要大.

In view of the characteristics of the low-permeability oil fields,through theoretical analysis and lab investigation,the characteristics of non-linear flow in low-permeability core,pressure distribution between oil wells and water wells and production formula of oil wells are derived.Compared with Darcy linear flow,oil well indicative curve of non-linear low isn't linear,and consumption of pressure is bigger in the global flow process.In this way, the consumption of pressure of non-linear low in the global flow process is bigger than that of non-Darcy linear flow.