DPCM Compression for Real-Time Logging While Drilling Data
Logging While Drilling (LWD) is a drilling technique which obtains and transmits the logging data during oil/gas drilling operations. Because of the limited available transmission bandwidth of mud channel, how to improve the bandwidth utilization becomes a critical problem in LWD research. In this paper, by discussing the information entropy of real logging data, the authors find that the original encoding of logging data is inefficient. To prune the data redundancy effectively and to improve the bandwidth utilization, they propose a novel compression method on the basis of Differential Pulse Code Modulation (DPCM).