注水井同心智能配水技术在杏南油田的应用

Application of Concentric Intelligent Water Distribution Technology in WaterInjection Wells of Xingnan Oilfield

随着油田水驱挖潜的深入,针对偏心配水工艺存在的7级以上测试阻卡率偏高、投捞困难,井下一次对接成功率低,配水间距大,影响水驱进一步细分挖潜的问题,研究了一种全新的同心智能配水技术。该技术不同于传统的同心配水工艺,通过电缆通信实现井下智能测调,能够彻底解决偏心配水工艺的固有缺陷;配水器水嘴一体化设计,取消堵塞器,无需投捞;智能测调仪井下对接灵活,配水间距不受投捞距离限制,可满足1. 5m小卡距细分。注水井同心智能配水技术现场试验16口井,其中最大细分级已达10级,突破常规7级细分界限,井下一次对接成功率达100%,测调效率与偏心高效测调工艺相比提高16. 7%,在水驱开发油田具有非常好的应用前景。

With the development and potential tapping by water flooding in the oilfield,conventional eccentric water injection technique has met the following problems:having relatively high stuck rate when testing more than 7 levels,being difficult in running and pulling the water distributor,having low success rate of primary downhole tools′connection and long distance between water distributors,etc,which affect the further subdivision and potential tapping of water flooding.A new concentric intelligent water distribution technology has been studied.The technology is different from the conventional concentric water distribution and it can realize downhole intelligent testing and adjusting via the wireline communication to overcome the inherent defects of eccentric water distribution technology.The integrated design of water distributor′s nozzle has eliminated the blanking plug with no running and pulling operation required.The intelligent testing and adjusting instrument is flexible for downhole connection,and the water distribution distance is not restricted by the running and pulling distance,which can meet the requirement of 1.5m span.16 injection wells that adopted concentric intelligent water distribution technology were applied in the field test,among which the maximum subdivision was up to ten levels.It made a breakthrough at the conventional subdivision limit of seven levels with success rate of 100%for downhole primary connection,and its testing and adjusting rate was 16.7%higher than that of eccentric high efficiency testing and adjusting technique,which would have wide prospects for application in the oilfield development by water flooding.