【摘要】 在实际油藏数值模拟中,黑油模型是应用最广泛且被普遍接受的模型。从数学的角度,黑油模型是由一组非线性抛物型偏微分方程、辅助方程以及给定的初边值条件所构成的定解问题。由于初始条件用于描述油藏开发的初始状态,其准确性对描述油藏开发动态起到关键性作用,因此黑油模型初始化是油藏数值模拟中的重要环节。采用重力平衡法,给出了黑油模型初始化的具体过程,即根据油藏在开发前重力及毛管压力作用达到水力静态平衡来实现油藏的初始化。为了验证该方法的准确性,针对一个油藏实例,运用本文方法与商业软件Eclipse分别对其进行初始化,得到近似相同的结果,说明本文的处理方法科学准确。更多还原

【Abstract】 Mathematically,it is a definite solution problem which is composed by a set of nonlinear parabolic partial differential equations with appropriate initial and boundary conditions. Since the initial state of a reservoir is described by the initial condition,which determines the accuracy of the reservoir development model,the initialization of the black oil model plays a critical role in numerical reservoir simulation. In this paper,the hydraulic equilibration method is employed to initialize the black oil model. Specifically,the initialization is realized by the hydraulic balance between gravity and capillary pressure before the development of the reservoir. Finally,in order to test the accuracy of our method,a given reservoir is initialized both by this method and the software Eclipse,respectively. Similar results of the two methods illustrate the reasonability and accuracy of our algorithm.更多还原