碳酸盐岩缝洞型油气藏渗流数学模型研究
首发时间:2020-09-16
摘要:碳酸盐岩缝洞型油气藏分布广而储量大,渗流规律与孔隙型和裂缝型油气藏有较大区别。笔者建立三重介质油气藏渗流数学模型,并选取边界元法进行求解,通过顶底封闭三重介质油藏无限大、径向封闭和径向定压直井渗流模型解析解对比边界元解进行验证。结果表明:三重介质油藏直井边界元模型可应用于计算不同边界类型的复杂外边界三重介质油藏渗流问题。
关键词: 碳酸盐岩 缝洞型油气藏 数学模型 边界元法 典型曲线
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Study on mathematical model of seepage flow in fracture-cave carbonate reservoirs
Abstract:Carbonate fractured-vuggy reservoirs are widely distributed and have large reserves, and their seepage laws are quite different from those of porous and fractured reservoirs. In this paper, the mathematical model of triple medium reservoir seepage is established, and the boundary element method is selected to solve it. The analytical solution of infinite, radial closed and radial constant pressure vertical well seepage model of triple medium reservoir with closed top and bottom is compared with the boundary element solution for verification. The results show that the vertical well boundary element model of triple medium reservoir can be applied to calculate the seepage problem of triple medium reservoir with complex outer boundary with different boundary types.
Keywords: Carbonate rocks Fracture-cave reservoir Mathematical model Boundary element method Typical curve
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