李忠伟,王鹏,崔学荣,吴春雷.基于DPCM算法的随钻测量数据压缩方法的研究[J].电子测量技术,2015,38(5):111-113
基于DPCM算法的随钻测量数据压缩方法的研究
Study on the algorithm for MWD data compression based on DPCM
  
DOI:
中文关键词:  随钻测量  数据压缩  DPCM  增量传输技术
英文关键词:MWD  data compression  DPCM  incremental transmission technology
基金项目:中国石油科技创新基金(2012D 5006 0304)、中国石油大学(华东)自主创新基金(14CX02028A)资助项目
作者单位
李忠伟,王鹏,崔学荣,吴春雷 中国石油大学(华东) 
AuthorInstitution
Li Zhongwei,Wang Peng,Cui Xuerong,Wu Chunlei China University of Petroleum 
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中文摘要:
      由于钻井液信道传输带宽有限、钻井液压力波信号的产生速率有待提高,因此,设计新型钻井液压力波信号发生器与引进数据压缩技术成为大幅提高井下信息传输效率的有效途径。通过对井下的各种随钻测量数据的分析发现其连续性较好,数据量值变化平缓,具有很强的相关性,采用基于差分脉冲编码(DPCM)的预测编码方法可以对井下数据进行大幅的压缩,在不改变现有硬件的基础上实现了数据传输速度的翻倍,而失真度则保持在可控范围之内。
英文摘要:
      The limitation of bandwidth in the channel of drilling fluid, and the demanding for faster generation speed of the pressure wave signal about drilling fluid are two challenges to the transmission of data from the bottom of the well. Because of this, a novel pressure wave signal generator for drilling fluid with the employment of data compression is an effective way to overcome these difficulties. In this paper, the good quality of consecution of measured data, and the gentle trend of the values, provide the chance of conducting great compression to the date by using DPCM predictive coding methods. Experiments’ results approved that based on present hardware and facilities, the transmission speed will double distortion measure is also within a controllable range.
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