人工裂缝井数值模拟网格技术研究

The research on numerical simulation grid technology of well with artificial crack

低渗透油田大部分的生产井都有人工裂缝,人工裂缝井数值模拟是为了更好的了解人工裂缝井渗流规律,搞清人工裂缝井的生产动态特征。这对低渗透油藏的有效开发具有重要的意义。网格技术对于人工裂缝井数值模拟非常重要,同时也是人工裂缝井数值模拟的一个难点。根据数值模拟网格技术的发展过程,给出了3种不同的模拟人工裂缝的网格系统,非均匀网格,PEBI网格和混合网格。分别介绍了这三种网格,分析了各种网格系统的优缺点,并对这三种网格做了比较,认为混合网格是人工裂缝井数值模拟最佳的网格系统。

Most of wells in low permeable oil field have artifical crack. In order to understand the flow law of well with artifical crack and know its characteristics of production performance, numerical simulation of well with artifical crack must be done. It has an important significance in developing low permeable oil field. Grid technology play an important role in numerical simulation, and it is a difficult problem. In this paper, according to the development of grid technology, three different grid for numerical simulation of well with artifical crack are given. They are non-uniform grid, PEBI grid and hybrid grid. The three grids are introduced, their advantages and disadvantages are analyzed, and compare have done. Hybrid grid is the best grid for numerical simulation of well with artifical crack.