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考虑了三重介质油藏介质变形与垂直裂缝井闭合的影响,推广了Cinco-Ley H的有限导流垂直裂缝井的双线性渗流理论,将流体在垂直裂缝井与地层中形成的渗流划分为两个区域:三重介质油藏中的非线性流动区域和垂直裂缝井内的非线性流动区域;由此建立了三重介质油藏有限导流垂直裂缝井的流-固耦合模型。鉴于该模型的强非线性,采用稳定的有限差分格式求得其数值解,并将数值结果绘制成试井样板曲线。将数值结果与不考虑介质变形或垂直裂缝闭合的模型进行对比验证了该文模型研究的必要性。另外,还讨论了垂直裂缝井渗透率模量、窜流系数、基岩弹性储容比、井筒储集系数对无因次井底压力及压力导数的敏感性影响。
Considering the influence of media deformation and vertical fractured well closure in triple media reservoir, the bilinear seepage theory of Cinco-Ley H finite-conductivity vertical fractured well is generalized. The seepage flow formed by fluid in vertical fractured well and formation is divided into Two regions: the non-linear flow region in the triple-medium reservoir and the non-linear flow region in the vertical fracture well; thus, the fluid-solid coupling model of the finite conductivity vertical fracture well in the triple media reservoir is established. In view of the strong nonlinearity of the model, a stable finite difference scheme is used to obtain the numerical solution, and the numerical results are plotted as the well test curve. The numerical results are compared with the model without considering the deformation of the medium or the closure of the vertical cracks, which verifies the necessity of the research on this model. In addition, the vertical fracture permeability modulus, channeling coefficient, bedrock elastic ratio and wellbore storage coefficient to the dimensionless bottom hole pressure and pressure derivative are also discussed.