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在低渗透油田渗流研究中,引入启动压力梯度,可以建立一定的数学模型,实现对油水井间压力分布的描述。低渗透油藏中油水井井距越大,启动压力梯度累加的影响越大;同时井间压力分布差与裂缝发育方向越接近,则渗流阻力越小,驱动压差越小。考虑启动压力梯度和裂缝因素,可以得到井间的压力分布曲线,得到的压力分布曲线与实际情况基本一致。通过对井间压力的描述,可以对井间压力进行预测,对油水井间的渗流进行大致的了解,对注水调整和加密调整有一定的意义。
In the study of seepage flow in low permeability oilfields, the introduction of the starting pressure gradient can establish a certain mathematical model to describe the pressure distribution between oil and water wells. The higher the well spacing of oil-water wells in low-permeability reservoirs, the greater the influence of initial pressure gradient accumulation. At the same time, the difference between crosswell pressure distribution and fracture development direction is closer, the smaller the seepage resistance and the smaller the driving differential pressure. Taking into account the start-up pressure gradient and fracture factors, the pressure distribution curve between wells can be obtained. The pressure distribution curve obtained is basically the same as the actual situation. Through the description of crosswell pressure, the crosswell pressure can be predicted, and the seepage between oil and water wells can be roughly understood, which has certain significance for waterflood adjustment and encryption adjustment.