聚合物分层注入相关问题探讨

A PROBE ON THE RELATED PROBLEMS OF LAYRING POLYMER INJECTION

聚合物驱分层注入技术是提高采收率的有效途径之一。大庆油田萨中开发区目前已有302口井分层聚合物注入,占总井数的37.6%,在聚合物驱开发中发挥了不可替代的作用,但受到油层适应性与分层注入工艺等多种因素的影响,在生产中还存在一些需要解决的问题。通过对处于不同聚合物注入阶段的分层聚合物注入井的油层动用状况、动态变化特征及生产问题的分析,阐述了分层井的选井原则及分层时机,分析了目前分层注入工艺的适应性与存在的问题,为进一步完善分层聚合物注入技术提供依据。

The layring polymer injection is the one of the effecyive ways enhancing oil recovery. At the present, thereare 302 wells in central Saertu development area in Daqing oilfield having been practiced layring injection, which take up 37.6% of total wells, the way has played a unreplacible role in polymer flooding recovery. But impacted by the multiple factors such as adaptability of reservoirs and layring injection technique, the way needs furtherly improved in practice. Through the analysis to reservoirs production dynamic situation of layring polymer injection wells in different polymer injection stages, dynamic change and production, the well-selecting rule and layring time of the layring wells are described, the adaptability and the existing problems of layring injection technique analyzed, which offer basis for furtherly improving layring polymer injection technique.