定向井表皮因子的计算方法及应用

CALCULATION OF SKIN FACTOR IN DIRECTIONAL WELLS AND ITS APPLICATION

研究了微可压缩流体在斜井内的不稳定流动状态,给出了数学模型,推导出了油井的完善程度和油井倾斜造成的表皮因子的计算式。该计算方法考虑了油井的倾斜度、打开程度、打开位置及油层均质性等因素。实际计算表明,方法简便、准确可靠,可用于计算定向井流体流入动态。

This paper analyzes the unsteady-state flow of a slightly compressible fluid into a slanted well and gives an equation for calculating the partial penetration and slanting of a well.The expression for calculating the skin factor of a directional well is obtained in consideration of deviation angle,well position and penetration,homogeneity of reservoir.Its application show that the calculation results are close to the experimental values.The calculation is simple,convenient and reliablo.lt can be applied to inflow performance relationship (IPR) of directional wells.