低渗透油藏水平井井网形式优选

Appropriate horizontal pattern configuration optimization in low permeability reservoir

水平井在开发低渗透油藏中获得了广泛的应用。为了充分发挥水平井的优越性,确定应用水平井的合理井网形式,利用数值模拟方法,对低渗透油藏中不同井网形式下的产能、采出程度、累计产水等参数进行了研究。结果表明,利用水平井能够显著提高产量,加快采油速度,但同时水平井也能加快见水时间 低渗透油藏水平井网整体开发以交错井网效果最好,井网最优穿透比为0.2-0.4。在分析剩余油分布时引入了流线分析的方法,更加直观地反映了油藏内流体流动状况。

Horizontal well is widely applied in developing low permeability reservoir.In order to fully utilize its superiority and establish the reasonable well pattern,features of different well patterns are studied in this paper.As the results show,horizontal well can improve productivity remarkbly and speed up the production rate,however it can also shorten the water breakthrough time.Interleave well pattern is the best when developing low permeable reservoir with horizontal pattern,the optimum penetration ratio is between 0.2and 0.4.A streamline analysis approach is applied when analizing the distribution of oil remaining,flowing state is reflected more audio-visually.