【摘要】 目前关于水平井流入动态(IPR)的研究仅限于溶解气驱的情况,还没有适合于油、气、水三相和整个油藏压力范围的水平井IPR模型。首先对现有的4种溶解气驱IPR方程进行了筛选,以Cheng和刘想平的方程为基础,建立了适用于油藏压力高于饱和压力的不含水组合型水平井IPR模型。采用纯油与纯水IPR曲线加权平均得到综合IPR曲线的方法,将组合型IPR方程扩展到油、气、水三相的情况,建立了适用于油、气、水三相和整个油藏压力范围的水平井IPR模型,并对水平井流入动态预测计算方法进行了研究。利用该模型可以计算采液指数、产量和井底流压以及绘制IPR曲线等。模型及软件已应用于大庆肇州油田低渗水平井的流入动态预测,效果良好。更多还原

【Abstract】 The study of inflow performance relationship (IPR) is mainly focused on dissolved-gas drive reservoirs, and there is no applicable horizontal IPR model for three phase flow of oil, gas and water and the whole reservoir pressure. In this work, based on Cheng and Liu’s formulas, the two of four present IPR equations for horizontal wells in dissolved-gas drive reservoirs, two assembled IPR models for horizontal wells with reservoir pressure higher than saturation pressure and water cut of zero were evolved. Then, by weighted average method, the compositive IPR curve with water flow can be obtained from pure oil IPR curve and pure water IPR curve. The assembled IPR models without water flow were extended to be applicable to three phase flow of oil, gas and water. As a result, a new IPR model for horizontal wells with normal reservoir conditions was established, which can be used to calculate fluid productivity index, production rate and bottom hole flowing pressure and draw IPR curve. The model and the corresponding programs have been used to predict the horizontal well inflow performance in Zhaozhou Oilfield and the effect is excellent.更多还原