海上大排量分注井无缆智能配水器水嘴压力损失数值模拟

Numerical simulation of the pressure loss at the water nozzle of wireless intelligent water regulator of offshore large-displacement separate injection well

刘义刚 孟祥海 陈征 张乐 蓝飞 张志熊

LIU Yigang MENG Xianghai CHEN Zheng ZHANG Le LAN Fei ZHANG Zhixiong

中海石油(中国)有限公司天津分公司 海洋石油高效开发国家重点实验室

Tianjin Company of CNOOC China Limited, Tianjin 300452, China State Key Laboratory of Offshore Oil Exploitation, Beijing 100027, China

与传统钢丝投捞分层调配相比，无缆智能配水器在海上大排量注水井分层配注中的时效有很大提升。但由于行业内还没有形成对海上大排量无缆智能配水器水嘴开度选择的相关标准，现场调配时只能根据现有经验尝试性选择水嘴开度，所以现有分层测调的时效仍有待提升。针对此问题，应用FLUENT软件对无缆智能配水器15级开度及不同流量(0~500 m³/d)所产生的水嘴压力损失大小进行了模拟，共形成137组水嘴开度、流量、压力损失数据，并将该模拟数据应用于渤海油田3口注水井共11个注水层段的调配作业中。现场调配结果表明，在11个注水层段水嘴开度的选配均一次性完成的情况下配注合格率达到90%以上，单层测调时效较经验法提升1/2~2/3，可用于指导海上大排量注水井测调工作。

Compared with the separate-layer allocation of traditional wireline fishing, the wireless intelligent water regulator greatly improves the separate-layer injection allocation efficiency of offshore large-displacement water injectors. In this industry, however, there is no related selection standard on the nozzle opening of offshore large-displacement wireless intelligent water regulator, so during the field allocation, the nozzle opening can be only selected tentatively according to existing experience. Therefore, there is still some improvement space for the existing separate-layer testing and allocation efficiency. To this end, the pressure loss at water nozzle generated at 15 openings of wireless intelligent water regulator and different flow rates (0-500 m/d) was simulated by using FLUENT software. As a result, 137 groups of nozzle opening, flow rate and pressure loss data were formed. Then, the simulation data was applied to the allocation operation in 11 water injection intervals of 3 water injectors in Bohai Oilfield. It is shown that the qualification rate of the injection allocation is over 90% while the selection of nozzle opening for 11 water injection intervals is completed in one time, and the single-layer testing and allocation efficiency is 1/2-2/3 higher than that of empirical method, so it can be used to guide the testing and allocation of offshore large-displacement water injectors.

10.13639/j.odpt.2021.02.018