测井数据的实时无损压缩研究和硬件实现

Research and Implementation of Real-time Lossless Compression for Logging Data

为了实现针对石油测井数据的高效率实时传输,提出了一种基于FPGA的针对测井数据的编码方案,实现了数据的实时无损压缩的存储与转发,有效地提高了数据传输效率。通过对测井数据用不同的压缩方法进行处理,分析比较字典编码(LZW算法)和其他无损压缩算法的特征。结果表明,采用字典编码的方法,压缩率最高,能够达到20%左右,而且该算法复杂度较低,有利于硬件的实现,本文给出了部分编码过程的仿真截图。

To realize the real time compression of the petroleum logging data with high efficiency, an encoding scheme based on FPGA which is aiming at the logging data is proposed. It can complete the storage and retransmission of the real-time and lossless compressed data, so that improving the data transmission efficiency effectively. Through dealing with the petroleum logging data in different compression methods, the features of LZW algorithm feature and other algorithms are analyzed and compared. The result demonstrates that the compression ratio of LZW algorithm is higher than that of others, and it can reach about 20 percent. In addition, the complexity of the algorithm is lower, so it is easy to realize the hardware. The paper also presents some simulation screenshots of partial encoding process.