复杂断块油藏水平井水淹后差异化治理技术

Differential treatment technology for water flooded horizontal wellsin complex fault block reservoirs

针对江苏复杂断块油藏水平井在开发过程中暴露的水淹严重问题,以水平井水淹动态曲线的形态为判断依据,将水平井划分为局部水淹型、整体水淹型和低液低效型三种类型。根据每一种类型水平井在开发过程中的生产特点及剩余油分布规律,结合物理模拟、油藏工程方法、数值模拟等研究手段,开展了水平井差异化治理提高采收率的技术研究,形成了不同类型水平井提高采收率技术对策。研究成果在现场得到了推广和应用,取得了较好的治理效果,可为国内其他油田水平井治理提供技术借鉴,具有重要的指导意义。

In view of the issue of water flooding in the development process of horizontal wells in complex fault block reservoirs in Jiangsu oilfield,horizontal wells were divided into three types:local water flooded type,overall water flooded type and low liquid low efficiency type,based on the shape of horizontal well water flooding performance curve.According to the production characteristics and remaining oil distribution law for each type of horizontal well in the development process,incorporating methods such as physical simulation,reservoir engineering and numerical simulation,the differential treatment for enhanced oil recovery technology of horizontal well was studied.Technical countermeasures for EOR of different types of horizontal wells were formed,which has been widely applied in the field and achieves good effect.The results can provide technical reference for horizontal well treatment in other oil fields,and has important guiding significance.