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本文将钻柱测试的不稳定资料转变为稳定资料。提出当生产时间增大到一定值时,油井生产出现视稳定状态,推导出视稳定流动压力公式,研究了用视稳定流动压力及视稳定压差计算油井产能、表皮系数、产能比、堵塞比的方法。并通过油井验算与美国江斯顿法对比,证明此法较符合实际。还用变产量方法分析压力恢复数据和计算流动系数及渗透率,与赫诺法对比,变产量法求得的地层参数更接近于模拟数值。
This article transforms unstable data from drill string tests into stable data. It is put forward that when the production time increases to a certain value, the steady state of oil well appears and the steady flow pressure formula is deduced. The calculation of well productivity, skin coefficient, capacity ratio and blockage ratio by steady flow pressure and apparent pressure difference is studied. Methods. And through the oil well checking with the United States Jiangsun law comparison, proves that this method is more realistic. The variable recovery method is also used to analyze the pressure recovery data and to calculate the flow coefficient and permeability. Compared with the Hino method, the formation parameters obtained by the variable production method are closer to the simulation values.