抽汲井抽汲停产后的液面恢复与常规的抽油井的动液面恢复有所不同,主要是停产恢复时重力分异作用更加明显.根据这一性质利用液面深度数据折算井底流压,并考虑带封隔器和不带封隔器井型的情况.对均质油藏建立了圆形封闭地层中心一口抽汲井液面恢复数学模型.在考虑井储效应和表皮效应的情况下,应用拉普拉斯变换和贝塞尔函数理论对定解问题求解,绘制了抽汲井液面恢复图版,可解释地层压力、地层渗透率和表皮系数,并开发了抽汲井液面恢复资料解释软件.实际应用表明解释结果和其他解释方法结果十分吻合.%The fluid level of swabbing wells with packers or without packers is different from other wells' when the swabbing wells are stopped swabbing,because the effect of gravity differentiation is obvious,which is used to calculate the sandface pressure.In the homogen reservoir,flow mathematic model of build-up of fluid swabbing well in circular sealed stratum is built up under considering the well bore effect and skin factor.Then,the non-homogeneous equation's exact solution in Laplace space of the model are acquired by using theory of Laplace transform and Bessel function,then the chart of type curve and the matching of type curve are analysed.Finally,the software of swabbing well's fluid level build-up is developed,which is used to calculat the the formation parameters that are fitted the formation parameters calculated with other methods.
展开▼
