A dual-porosity and dual-permeability model of fracture-vug carbonate reservoir is established, and fully implicit method is used to solve the inter-porosity flow function.
在此建立了碳酸盐岩缝洞型油藏双孔双渗渗流模型，利用全隐式方法对孔洞与裂缝间窜流量的计算函数进行了求解。
As 2-d 3-t heat conduct equations are discretized in a fully implicit method, it is very difficult to solve the nonlinear algebraic equations obtained due to strong nonlinearity.
由于二维三温热传导方程具有很强的非线性特性，因此采用全隐格式对该方程离散后，所得非线性代数方程组的求解将变得非常困难。
As 2-d 3-t heat conduct equations are discretized in a fully implicit method, it is very difficult to solve the nonlinear algebraic equations obtained due to strong nonlinearity.
由于二维三温热传导方程具有很强的非线性特性，因此采用全隐格式对该方程离散后，所得非线性代数方程组的求解将变得非常困难。
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