Abstract: An oilfield water flooding pipeline network is a large-scale fluid network system. Conventional model calculation method is time-consuming and has greatly hindered the development of simulation and optimization of an oilfield water flooding system. On the base of analysis,two methods are given in this paper. One is the model simplification technology which reduces identity matrix K dimension considerably, and the other is the improved iteration method which reduces the amount of calculating work from n' to n. A calculating software about a large-scale oilfield pipeling network is created by the use of the two methods. The result indicates that on the premise that the calculating accuracy is met,the model calculating speed is enhanced extremely. The technology has been applied to oilfield flooding system and received high ratings.

Key words: oilfield, water flooding, pipeline network, modelling, disposal, calculation method, iteration

摘要： 油田注水管网系统属于大规模复杂流体网络系统。常规的系统模型计算方法需耗费大量的时间,它严重阻碍了注水系统仿真及优化技术研究的发展。通过研究和分析,提出两种提高系统模型计算速度的方法,一是采取模型简化技术,从而大大降低了系统特性矩阵的维数;二是改进常规的迭代计算方法,它避免了“0”元素的存储和计算,从而将计算工作量从二次方级降至一次方级。基于上述两种方法,将模型简化技术与改进迭代法相结合,编制出大型油田注水管网解算程序。计算结果表明,在满足计算精度的前提下,大大缩短了系统模型的计算时间。目前,该项技术已应用于油田注水系统,结果令人满意。

关键词: 油田, 注水, 管网, 建模, 处理, 计算方法, 迭代法