平衡注水工艺管柱及配套工具研究与应用

Research and Application of Balanced Water Injection String and Matching Tools

目前海上油田水平注水井在单砂体开发应用日益增多,且大多采用笼统注水,水平井井段吸水剖面存在差异性,导致油田见水后含水上升较快,存在明显注入突进,注采矛盾日益突出。矿场测试结果表明,在相同压力条件下,改变注入方式,沿水平井井段吸水剖面得到有效改善。为此开发了一种适合海上油田水平井的平衡注水工艺管柱及配套工具技术,该工艺管柱可实现水平井多点注入,改善注水效果,另外该工艺管柱具有辅助水平井调剖调驱,实现水平井调剖调驱效果最大化的功能,在海上油田水平注水井A1H中成功应用,取得良好效果。

Research and application of balanced water injection process string and supporting tools at present,horizontal water injection wells in offshore oil fields are increasingly used in single sand body development,and most of them use general water injection.There are differences in water injection profiles of horizontal well sections,resulting in rapid water cut rise after water breakthrough in the oilfield,obvious injection breakthrough,and increasingly prominent injection production contradiction.The field test results show that the water injection profile along the horizontal well section is effectively improved by changing the injection mode under the same pressure conditions.For this reason,a balanced water injection process string and matching tool technology suitable for horizontal wells in offshore oil fields have been developed.This process string can realize multi-point injection of horizontal wells and improve water injection effect.In addition,this process string has the function of assisting profile control and flooding of horizontal wells to maximize the effect of profile control and flooding of horizontal wells.It has been successfully applied in horizontal water injection well A1H in offshore oil fields and achieved good results.