College of Geo-exploration Science and Technology, Jilin University, Changchun 130026, China

In order to obtain a more effective method of microseismic first arrival automatic picking, the principle of three typical automatic picking method (STA/LTA method, polarization method, AIC method) and research advance are analyzed. The application of each method is compared, and the practicability, advantages and disadvantages of each method in the actual data processing are discussed. On the basis of synthesizing three methods of picking first arrivals of the microseismic, a comprehensive method is developed. The actual data processing results show that the comprehensive method can pick up the first arrivals of the microseismic signals with weak amplitude and low signal-to-noise ratio, and improve the picking accuracy.