窄河道砂高含水井侧钻地质设计优化与应用——以大庆外围葡萄花油层为例

Optimization and application of geological design of narrow channel sand well sidetracking with high water content:A case study of Putaohua oil layer in the Daqing peripheral Oilfield

针对窄河道砂高含水井超短半径水平侧钻后含水上升快的问题,通过优化入层距、侧钻方向、水平段长度、完井方式等影响因素,形成窄河道砂高含水井侧钻优化设计技术;并在此基础上,综合考虑地质参数、生产动态、数模预测结果,建立了窄河道砂高含水井侧钻选井、选层标准。现场实施结果表明,窄河道砂高含水井侧钻后含水上升速度明显减缓,可实现较好的降水增油效果。该研究结果可为高含水长关低效井治理提供重要的技术支撑。

Aiming at the problem of water cut rising fast after ultra-short radius horizontal sidetracking of narrow channel sand wells with high water content,the optimal design technology of sidetracking for narrow channel wells with high water content was developed by optimizing the influence factors such as entry distance,sidetracking direction,horizontal section length and completion method.On this basis,considering the geological parameters,production dynamics and numerical model prediction results,the criteria of sidetracking well selection and layer selection are established.The field implementation results show that the water cut rise rate slows down obviously after sidetracking,which can achieve good precipitation and oil increase effects.The research results can provide important technical support for the treatment of long shut-in low efficiency wells with high water content.