Abstract: For the sake of scientifically selecting the prospecting and developing logging methods,and of improv-ing the logging evaluating on coal related gas reservoir,we researched two kinds of logging techniques on pros-pecting coal related gas reservoirs on the basement of surveying and studying,by means of the re-recognizing the developments mechanism and effect factors of coal related gas,and by means of the comparative analysis on coal-bed methane(CBM) and coal-derived gas(CDG) reservoirs.And then,we studied the evaluating content and tech-nical requirement of coal related gas reservoir logging.Moreover,we proposed the optimizing scheme of logging evaluating techniques about coal related gas reservoir,that is multidisciplinary anglicizing the features of the in-terest region and identifying the coal layer and permeable sand with the relevant logging means,then calculating the reservoir parameters and developing the flow potential appraisement and evaluation of reserves.The studying indicated that conventional logging is the effective means for identifying coal related gas on quality,and the opti-mizing evaluating techniques of CBM and CDG could complete the quantitative evaluating.The research has the important intention on development of coal related gas logging.