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本文建立在常规不稳定试井理论基础上,利用“压力恢复速度”概念和“最小二乘法”原理导出一种计算油井目前地层压力方法。这种方法借助电算克服图解技术处理压力恢复数据的随意性,从而提高计算压力精度。经油田上340口井次计算表明,该方法与我国大庆油田曾经习惯应用的“松Ⅰ法”计算结果完全吻合,即两种方法计算压力值绝对误差|△Ρ|≤2大气压时符合率达92.5％。因此,这种方法矿场可以应用。
Based on the conventional unstable well test theory, this paper uses the concept of “pressure recovery speed” and “least square method” to derive a method to calculate the current formation pressure of oil well. This method overcomes the discrepancy of the pressure recovery data by means of electrical calculation to improve the calculation pressure accuracy. The calculation of 340 wells on the oil field shows that this method is in good agreement with the “Song Ⅰ method” used by Daqing Oilfield in our country, that is, the coincidence rate of the two methods when calculating the absolute value of pressure error | △ P | ≤ 2 atm 92.5%. Therefore, this method can be applied to the mine.