Abstract：In order to improve the applied effects of full-wave acoustic logging data in production,the paper developed the preprocessing techniques of full-wave acoustic logging data including "positioning zero technique"in disordered wave zone,spectrum analysis and application and filtering technique.The method for automatically detecting first break of informational wave by fast specialist-aided tomputer solved the problem of detecting first break of informational wave in soft formation having weak signal.The paper also analyzed the feature that the gas-bearing formation has different information in full-wave acoustic logging data and ordinary log- ging data,forming integrative judgement index of natural gas and making the characteristics of gas-bearing formation clearer.The real cases showed that the method has gained good results.
