【摘要】 为了研究部分射开直井的生产动态特征,建立各向异性箱形储层中一口部分射开直井数学模型,采用Laplace变换、Fourier变换及其反变换等方法对模型进行求解,将得到的压力解与数值解进行拟合,并绘制和分析不同影响因素下的压力与压力导数动态图版。结果表明:部分射开直井的射开程度主要影响中期球形流发生的程度,储层射开程度越小,中期球形流越明显;渗透率各向异性因子主要影响中期径向流发生和持续的时间,各向异性因子越大,中期径向流发生得越晚且持续时间缩短。为提高产能,应尽可能增大直井的射开程度并减少储层水平与垂向渗透率的差异。更多还原

【Abstract】 To study features of the production performance of partially penetrated vertical wells,a mathematical model of a partially penetrated vertical well in an anisotropic boxed reservoir is established. Using methods of dimensionless,Laplace transform,Fourier transform and their inverse transform,the analytical solution is obtained. Then the analytical solution is validated with numerical simulation solution. Besides,charts of dynamic pressure and pressure derivative under different influencing factors are also given. Analysis shows that penetration ratio of the well mainly affects the degree of the middle spherical flow. The smaller the penetration ratio,the greater the middle spherical flow happens. Permeability anisotropy factor mainly affects the occurring and duration time of middle radial flow,and the larger the anisotropy factor,the later the middle radial flow occurs and the shorter the duration time is. In practical production process,it is necessary to increase the penetration ratio of the well and decrease the difference between horizontal permeability and vertical permeability as far as possible,which can enlarge productivity.更多还原