注水开发油田中后期动态预测方法和应用软件

RESERVOIR BEHAVIOR PREDICTION TECHNIQUE FOR A WATER FLOODED RESERVOIR IN ITS LATER DEVELOPMENT STAGE

我国大多数油田正处在中、高含水开发阶段。在此阶段,不论增产还是稳产均需要陆续增加措施量,因此,油田动态,就不再是自然发展,而是一个在人的支配之下的动态过程。为了定量把握这个过程,我们把措施量多少及各自的效果提入预测公式之中。本文运用已有的知识,建立了多步递阶模型结构,通过系统辨识建立了动态模型。这种模型既可用于动态预测又可用于措施效果评价分析;现已编好了定型程序,便于应用,经试算后取得了很好的结果。

Most of the oil field in our country are in their middle-late development stage, Technical measures have been taken for well stimulation or stable production. Thus, reservoir behavior is that of an artificially affected dynamic system instead of a naturally developed one. For a quantitative description of such a process, it is necessary to include the quantitative effects of all these measures into the prediction formulas. This paper suggests a dynamic model established through a multistep recursive structure by an application of system identification. This model can be used both in behavior prediction and in the evaluation of each technical measure used. A computer program has been given also in this paper. An application of this model to an actual field had given satisfactory results.