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钻井液是石油行业无线随钻领域典型的信息传输介质。但是长久以来,缺乏对其数据携带能力影响参数的相关研究,导致很难开发出高性能的泥浆脉冲发生器。针对这个问题,以CFD流体仿真技术为工具;以油田实际井下工作环境为背景;并以井深参数为变量对水基钻井液本身的数据传输能力进行了系统的研究。最终通过仿真实验得到了1 000~6 000 m深度下的泥浆压力波传输速率与井深的可靠对应关系;通用极限速率;并总结出了压力波振幅随深度增加而产生的变化规律。整个仿真实验的结果对高速泥浆脉冲发生器的研制具有重大意义。
Drilling fluid is a typical information transmission medium in the wireless industry while drilling in the petroleum industry. However, for a long time, the lack of relevant research on the parameters affecting the data carrying capacity has made it very difficult to develop high performance mud pulse generators. To solve this problem, the CFD fluid simulation technology is used as a tool; the actual downhole working environment of the oilfield is taken as a background; and the data transmission capability of water-based drilling fluid is systematically studied by taking the well depth parameter as a variable. Finally, a reliable correspondence between the velocity of the mud pressure wave and the well depth at a depth of 1 000-6 000 m was obtained through simulation experiments; the universal limit velocity; and the variation of the amplitude of the pressure wave with increasing depth was summarized. The results of the entire simulation experiment for the development of high-speed mud pulse generator is of great significance.