无线随钻测量信息传输的现状与问题

为了及时获得钻井作业时的随钻测量信息,准确建立地面与井底之间的闭环信息流通,对无线随钻测量信息的传输方式进行了研究。介绍了钻井液脉冲、电磁波、声波三种无线随钻测量信息传输的工作原理,对比了三种传输方式的优缺点,并对三种传输方式存在的问题进行了详细分析。最后,指出了无线随钻测量信息传输方面的研究重点:钻井液脉冲传输方式应研发连续波信号发生器,实现更高的数据传输速率、工作可靠性以及环境适应能力;电磁传输方式应优化信号发生器的工作频率和效率,研究微弱信号检测及处理,增加信号中继器等技术,提高电磁传输信号的距离;声波传输方式应在码间干扰、噪音、声波能量的衰减等方面予以研究。

The Current Status and Problems of Wireless Signal Transmission in Measurement While Drilling

In order to obtain measurement information in time while drilling and accurately set up＂closed loop＂communication between ground and the bottom of a well,the wireless signal transmission manner in measurement while drilling（MWD） was studied.It introduced working principle of three kinds of wireless signal transmission in MWD,such as drilling fluid pulse,electromagnetic wave and acoustic wave,compared advantages and disadvantages,and detailedly analyzed existed problems in three transmission manners.Finally,it pointed out the research emphases on the wireless signal transmission in MWD：drilling fluid pulse transmission method should develop continuous wave signal generator to realize high transmission efficiency,working reliability and environmental adaptability.Electromagnetic wave transmission method should optimize working frequency and efficiency of signal generator,study measurement and disposal weak signal,increase signal repeaters,and improve electromagnetic wave transmission distance.Acoustic wave transmission method should study from several aspects,such as intersymbol interference,noise and acoustic wave energy attenuation.