衰减型油井压力恢复曲线的应用

应用衰减型油井压力恢复曲线方程,对大庆油田萨中地区51口聚驱井、密井网和基础井网的油井进行了计算,结果表明:经典半对数方法出现直线段的井仅占23.5%,而衰减型方程出现直线段的油井则占98%;衰减型曲线方程不仅可以确定出稳定的地层渗透率等参数,而且还可以有效判别近井地带污染情况,解释一-些地区地层压力与注采比变化的异常现象。

Application of Pressure-Build-up Curves in Attenuation Wells

The paper made a calculation on the 51 polymer flooding wells, infilled well patterns and oil wells of basic well patterns in Sazhong region in Daqing oilfield, applying the equation of attenuating well pressure build-up curves and the result indicated that (1) the number of wells with straight-line portion calculated with classical send-log methods account for only 23.5% of the total, while the wells with straight-line portion calculated with attenuation equation account for 98%; (2) attenuation curve equation can be not only used to determine the parameters of the stable formation permeability,but can also identify effectively the near-well bore contamination and interpret the abnormal phenomenonof formation pressure and injection to production ratio in some parts of the field.