图论法在基于混合网格的油藏数值模拟软件设计中的应用

在油藏数值模拟中 ,井模型的选取直接影响整个计算结果。充分考虑了井附近的渗流特征 ,建立了更符合井区域渗流规律的井模型。将图论理论应用于油藏数值模拟软件的设计中 ,使计算变得迅捷 ,有效地实现了对复杂形状网格的管理。根据图论网格管理系统的特点 ,采用全隐式和IMPES相结合的数值算法 ,编制了油藏数值模拟软件。简单算例的计算结果表明 ,采用新井模型的油藏数值模拟软件 ,其计算结果比传统的数模软件更能准确合理地反映井底流压的变化。

Application of graph theoretic model to design of reservoir simulation software based on grid

The selection of the oil well models has a direct effect on the whole calculation results in the simulation of reservoir. A new type of oil well model in accordance with the law of seepage was constructed in full consideration of seepage features nearby the oil well. The graph theory, that is a main tool for the network analysis, was applied to the design of the reservoir simulation software, in order to realize the management of grid with the complex configuration. The completion of the reservoir simulation software using the IMPES and Full Implication methods is on the grid management system. The simulation result of a simple example shows that the reservoir simulation software designed with the new oil well model can describe the changes of the flow pressure at the bottom hole better than the traditional simulation software.