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利用一点法稳定试井理论模型,对克拉玛依五区南气田克75井区气顶气藏稳定与不稳定试井等动态资料采用气井通常的二项式方程进行分析研究,导出了适合五区南气田的一点法稳定试井经验公式,由此公式可利用一个单点稳定流测试数据确定气井的绝对无阻流量及预测不同流压下的气井产能变化。同时,又通过对一点法稳定试井指数式曲线的拟合和公式化,导出了改进的一点法稳定试井即两点法稳定试井经验公式,从而达到在不关井情况下,利用日常生产数据随时获得生产管理中所必需的地层压力、无阻流量值。经验证,由经验公式所得值准确度较高,与实测值相对误差小于10%.
Based on the one-point method of well test theory, the dynamic binomial equation of gas well in Well K75 of Kelamayi five-zone gas field is analyzed and studied by using the usual binomial equation. The one-point empirical well test formula for gas field stabilization allows a single steady-state flow test data to be used to determine the absolute unobstructed flow rate of a gas well and to predict changes in gas well productivity at different flow rates. At the same time, through the fitting and formulation of one-point stable well test exponential curve, the improved one-point stable well test, that is, the two-point stable well test formula is obtained, so that the daily production Data is always available for formation pressure and unobstructed flow rates in production management. It is verified that the accuracy obtained from the empirical formula is high, and the relative error with the measured value is less than 10%.