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在采油工艺中,以高速率(10~40Baud)的无线传输方法传送数据和控制井底机构的做法,已被大量采用。本文介绍了它的发展、样机的设计以及所进行的买验。该实验是为了确定声波的衰减、流体粘度的影响、井口压力的影响、声音的噪音水平以及它们对波特率的影响。对时域信号和频域信号的评价,将用来确定上行发送器和下行发送器的影响。同时,在不同的深度处测量了回声以及其它形式的干扰,用来进一步研究信号的行程,并且确定了在不同流体粘度和不同频率下,每1000ft深度的声波衰减(dB)。这个方法可以用来监测压力、温度、粘度和流量等多种井下传感器,提供存储的和实时的井下信息。另外,在射孔和其它需要挖制深度的作业中,该方法根据γ射线与深度的关系,可以提供起下钻的实时情况。其它方面的应用,如安全阀、压裂作业和油田生产层的控制等。该方法所具有的调整分布、执行多重任务和自适应等重要功能,使其在油井上得以广泛应用。
In the production process, the use of high-speed (10 ~ 40Baud) wireless transmission of data transmission and control of the bottom of the organization approach has been widely used. This article describes its development, the design of prototypes, and the buying practices. The experiment was designed to determine the attenuation of sound waves, the effect of fluid viscosity, the effect of wellhead pressure, the noise level of the sound and their effect on the baud rate. The evaluation of the time domain signal and the frequency domain signal will be used to determine the effect of the upstream transmitter and the downstream transmitter. At the same time, echo and other forms of interference were measured at different depths to further study the signal travel and to determine sound attenuation (dB) at depths of 1000 ft at different fluid viscosities and at different frequencies. This method can be used to monitor a variety of downhole sensors such as pressure, temperature, viscosity and flow to provide stored and real-time downhole information. In addition, in perforations and other operations that require dug depth, this method provides real-time drill-down based on the gamma ray versus depth. Other applications, such as safety valves, fracturing operations, and control of the production floor of the field. The method has such important functions as adjusting distribution, performing multiple tasks and adapting to make it widely used in oil wells.