线性复合油藏水平井试井模型及典型曲线分析  

Well Test Model of Horizontal Wells in Two-Zone Linear Composite Reservoirs and Typical Curves Analysis

作　　者：任俊杰[1] 郭平[1] 彭松[1] 

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室,四川成都610500

出　　处：《力学季刊》2013年第4期532-540,共9页Chinese Quarterly of Mechanics

基　　金：国家科技重大专项(2011ZX5046-03)

摘　　要：针对线性复合油藏的特点,建立了无限大外边界的线性复合油藏水平井试井模型,利用Laplace变换、有限Fourier余弦变换以及Fourier变换对模型进行求解,最后利用Stehfest数值反演绘制了压力典型曲线,对整个不稳定渗流过程进行了流动阶段的划分,分析了相关因素对压力典型曲线的影响.结果表明:无限大外边界的线性复合油藏水平井的渗流过程可以分为7个流动阶段:水平井与两区分界面的夹角对压力典型曲线几乎没有影响,而水平井中心距两区分界面的无因次距离对压力影响较大,无因次距离值越小,中期径向流阶段的持续时间越短,晚期径向流阶段的开始时间越早.Considering the characteristic of two-zone linear composite reservoirs, a well test model of horizontal wells in two-zone linear composite infinite reservoirs was established. The model was solved using the Laplace, finite Fourier cosine and Fourier transformation. Pressure typical curves were plotted by the Stehfest numerical inversion method. Different flow periods of the seepage flow of horizontal wells were identified and the effects of relevant parameters on the pressure typical curves were analyzed The results show that there are seven flow periods of the seepage flow of horizontal wells in two-zone linear composite infinite reservoirs. The angle between the horizontal well and the interface has little influence on pressure typical curves, while the dimensionless distance between the midpoint of the horizontal well and the interface has a significant influence on pressure typical curves. As the dimensionless distance between the midpoint of the horizontal well and the interface decreases, the duration of the middle-time radial flow becomes shorter and the late-time radial flow occurs earlier.

关 键 词：线性复合油藏 水平井 试井模型 典型曲线 压力动态 

分 类 号：TE353[石油与天然气工程—油气田开发工程]