Abstract: M oilfield belongs to shallow extraheavy oil reservoir. It has come into later stage of steam drive and takes on characteristics as high degree of recovery, increasing decline of production and shrinking benefits. In order to exploit potentialities of northern reservoir and improve the reservoir development, typical well groups were chosen for numerical simulation to optimize injection rates, team quality and to compare development effect of different intermittent steamflood. As a result, an optimal alternative was chosen for the target zone. This research approach provided a reference significance for steamflood of similar oilfield.

Key words: ExtraHeavy oil reservoir, Numerical simulation, Steam drive, Injection rate, Steam quality, Intermittent steamflood

摘要：  M 油田为一浅层特稠油油藏, 目前已进入蒸汽开发后期, 采出程度高, 产量递减加快, 开发效益下降。为挖掘油藏北部汽驱区潜力并提升开发效果, 选择有代表性的井组, 利用数值模拟的方法对其注汽速度、 注汽干度进行优化设计, 并对不同间歇汽驱开发方式的效果进行了对比研究, 最后优选出适合目标区域的蒸汽驱开发方式。研究结果对相似油田蒸汽驱的开发具有一定的借鉴意义。

关键词:  特稠油油藏, 数值模拟, 蒸汽驱, 注汽速度, 注汽干度, 间歇汽驱