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配水器的选取会对油田注水效果产生明显影响。为精确地描述注水井注入过程中井底压力和流量的动态响应,本文在传统的内边界井处理模型的基础上建立了考虑水嘴压力损失影响的井处理模型。耦合求解井底压力、流量及地层流动,得到了注入过程中考虑水嘴压力损失影响的井底压力和流量响应情况。以此来分析不同水嘴、渗透率对井底压力、注入量随时间变化的影响。计算结果表明,在数值模拟中如不考虑配水器影响,会对油田的注水过程的认识产生明显偏差。得到如下结论:在相同的地层条件下,初始注入量相同时,小水嘴比大水嘴更有助于注入量的稳定;嘴径相同的情况下,地层渗透率是影响注入量变化的主要因素。
The choice of water distributor will have a significant impact on the water injection effect. In order to accurately describe the dynamic response of bottom hole pressure and flow rate during the injection process of injection wells, a well treatment model considering the influence of nozzle pressure loss is established based on the traditional inner boundary well treatment model. The bottom hole pressure, flow rate and formation flow were coupled by coupling to obtain the bottom hole pressure and flow rate response considering the nozzle pressure loss in the injection process. In order to analyze the impact of different faucets, permeability on the bottom hole pressure, injection volume over time. The calculation results show that there is a clear deviation in understanding the water injection process in oilfields without considering the influence of water distributor in numerical simulation. The conclusions are as follows: Under the same formation conditions, when the initial injection amount is the same, the small water nozzle is more conducive to the stability of the injection amount than the large water nozzle; and the permeability of the formation is the main factor that affects the variation of the injection amount factor.