陆相水驱油藏断层分割与剩余油富集研究

Study on fault segmentation and remaining oil enrichment in terrestrial water drive oil reservoirs

中国东部老区的陆相水驱油藏目前已全面进入高含水、高采出程度开发阶段,因此,认识剩余油分布,成为老油田开发调整及提高采收率的重要内容。文章重点论述了断层分割控油模式及对剩余油富集的控制机理,依据断层发育部位和力学机制不同建立了4种断层分割控油方式;利用物理和数值模拟方法研究断层分割控油机理,建立断层分割控油的定量预测模型。研究表明,高含水复杂非均质油藏的剩余油分布主要受断层、储层非均质性及注采方式等控制。

At present, terrestrial water drive oil reservoirs of old areas in eastern China have entered the development stage with high water - cut, high recovery percent of reserves in an all - round way. So the knowledge of remaining oil distribution has become the important content of developing,adjustment and enhancing oil recovery of the old oilfields. This paper focused discussion on oil control model of fault segmentation and oil control mode and its controlling mechanism to remaining oil enrichment. In accordance with different fault development position and mechanical mechanism, four oil control models of fault segmentation were built. The oil control mechanism of fault segmentation was studied making use of physical and numerical simulation method, then quantitative predictive models were also built for oil control of fault segmentation. The re-search presents that the remaining oil distribution in complicated heterogeneous oil reservoir with high water cut was controlled by fault, reservoir heterogeneity, injection-production pattern and so on.