The dual‐porosity model is usually employed to simulate the flow in fractured reservoirs. However, its original form for the multiphase flow does not consider the displacement effect under macropressure gradient. Especially for the incompressible multiphase flow, it predicts zero transfer term between fracture and matrix, which is unreasonable. To improve this, a modified double‐porosity model is proposed for incompressible two‐phase flow, in which the displacement effect is considered and the corresponding shape factor is derived. For the anisotropic case, the shape factor of displacement depends upon the velocity direction. The accuracy and the efficiency of the proposed dual‐porosity model are indicated through numerical tests.

中文翻译：

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考虑不可压缩两相流驱替效应的双孔隙模型

通常采用双孔隙度模型来模拟裂缝性油藏中的流动。但是，其多相流的原始形式并未考虑大气压梯度下的位移效应。特别是对于不可压缩的多相流，它预测裂缝和基质之间的零传递项是不合理的。为了改善这一点，针对不可压缩的两相流提出了一种修正的双孔隙度模型，该模型考虑了位移效应并导出了相应的形状因子。对于各向异性的情况，位移的形状因子取决于速度方向。通过数值测试表明了所提出的双孔隙度模型的准确性和效率。