【摘要】 建立了稳定渗条件下的有限元方程,针对定边界和封闭边界混合作用下的渗流问题进行了模拟计算,给出了圆形地层和矩形地层在以上条件下的压力分布,结果表明,混合油藏外边界将产生复杂的地层压力分布,压力分布随地层方位的不同而不同,同时说明,有限元法用于求解复杂边界条件的渗流问题是方便有效的。更多还原

【Abstract】 In this paper, the finite element equations are established under the condition of steady-state flow. Numerical simulation are conducted to the flow reservoirs with the composite boundary condition of constant-pressure boundary and closed boundary, and the pressure distribution curves in circular reservoir and the rectangle reservoir are derived . The results show that the composite outer boundary can results in complex pressure distribution. The pressure distribution varies with the orientation. It is shown that finite element method is available and convenient to solve the problem of flow in porous media with complex boundary condition.更多还原