变形介质低渗透气藏非稳态渗流数学模型研究

Study on Unstable Seepage Flow Model for Low Permeability Gas Reservoir with Deformed Media

本文针对低渗透气藏垂直裂缝井的渗流过程,考虑了非线性渗流和介质变形系数的影响,建立了椭圆渗流模型。根据此模型可以对不同条件下气井产能进行计算分析。计算结果表明:气嘴直径越大,气井初始产量越高,递减速度越快;气嘴直径越小,气井初始产量越低,递减速度越慢。

Elliptic seepage flow model was established to describe seepage law in low permeable gas reservoirs with media deformation of wells with vertical fracture by considering non-linear seepage and deformation coefficient. Gas well productivity can be analyzed based on this model. Computational results showed a production decline under the conditions of various diameter of chock on well head.