摘要
针对水力压裂后形成有限导流能力水平裂缝的油层,应用有2个圆形渗流区域的双区模型来描述;根据平面径向不稳定渗流方程和双区界面连续条件,建立流体以恒定流量流入井筒条件下的压力降落数学模型,并应用Laplace变换和Stehfest数值反演技术求解不同生产时间下的无因次井底压力,根据无因次井底压力,计算当井底流压为饱和压力时的产量和采油指数,应用IPR曲线相关式,确定油井不稳定生产流入动态和某个井底流动压力下的产量递减预测。给出了一口井的计算实例,预测产量与油井的实际产量基本一致,且后期误差较小,说明所提出的方法是可行的。
A two-zone model including two circular flow domains was used to describe the oil zones which formed horizontal fractures of a limited flowing conductivity after hydraulic fracturing.According to the instable radial fluid flowing infiltration and the interface for dual-zone conditions,a mathematic model was for falling down pressure in the condition of the constant flowing into the wellbore,and Laplace transformation and Stehfest numerical inversion technology were used to solve the dimensionless pressure on the bottom in the production under different times.According to the dimensionless bottom pressure,the production and the oil productivity index were calculated when the bottom-hole flow pressure was equal to the saturation pressure,and the IPR curve was used to determine the inflow performance.The example of a well is given,the production forecasts and the actual production are basically the same with less errors at the late stage,it indicates that the method is feasible.
出处
《石油天然气学报》
CAS
CSCD
北大核心
2009年第1期121-123,共3页
Journal of Oil and Gas Technology
关键词
水力压裂
水平裂缝
产能预测
IPR曲线
hydraulic fracturing
horizontal fracture
productivity prediction
IPR curve
作者简介
张公社（1960-），男，1983年江汉石油学院毕业，硕士，教授，现主要从事采油工程、油气井试井与产能评价等方面的教学与研究工作。
