低渗透油藏矢量井网设计与整体压裂优化研究

低渗透油藏渗流规律的研究表明,受储层非均质性及微裂缝的影响,注采井网的部署、整体压裂方案的优化对于改善低渗透油藏的开发效果和提高采收率有着重要的影响。提出了矢量井网的概念,阐述了矢量井网与储层非均质性的关系,研究了与矢量井网配套的压裂工艺,包括深井限流压裂、转向压裂、分步加砂压裂等。将矢量井网与整体压裂方案在胜利油田史深100块进行了现场实施。结果表明,矢量井网是实现低渗透油田高效开发的重要手段。

Design of vector well pattern and optimization of integral fracturing in low permeability reservoir

The study results of fluid flow in low permeability reservoirs show that the design of flood pattern and optimization of integral fracturing strategy have important effect on improved development effect and oil recovery of low permeability reservoirs due to reservoir heterogeneity and microfractures.The concept of vector well pattern was proposed,and the relationship between vector well pattern and reservoir heterogeneity was expounded.The supporting fracturing technologies including deep well limited entry fracturing,deflection fracturing and multiple-stage sand fracturing were discussed.The strategy of vector well pattern and integral fracturing was implemented in Shishen 100 block of Shengli Oilfield,and the results show that the vector well pattern is an important approach to improve development effect of low permeability reservoirs.