湖南大学学报（自然科学版）2016，Vol.43Issue(8)：120-127,8.
基于三阶累积量一维切片的微地震信号时延估计
Time Delay Estimation of Microseismic Signal Based on One-dimensional Slice of Three-order Cumulants
摘要
Abstract
The effective microseismic signals are disturbed by noises,so the precision of time delay esti-mation is affected.Because time delay estimation is the key to determine location accuracy,one dimension-al slice method based on third-order cumulants was proposed for microseismic signal time delay estimation. Firstly,the three-order self accumulation and mutual accumulation of the signals were calculated,then, one dimensional slice was obtained in order to reduce the computation and to satisfy the field real-time re-quirements.Finally,the time delay value was obtained by the criterion function.Compared with the tradi-tional cross correlation method,this method has less sensitivity to the Gauss noise with unknown correla-tion and has stronger inhibition ability to the correlated Gauss noise.The simulation results show that the detection probability and root mean square error are better than the traditional method under the influence of Gauss random noise and correlated noise with SNR=-5 dB to SNR=1 5 dB.In the implementation of real data,the real microseismic noise probability statistic characteristics were analyzed and the data in the well were selected as references,and then the time delay value to the ground data was calculated on the ba-sis of the surface and borehole observation.The validity and the practicability of this method were verified.关键词
参数估计/噪声抑制/三阶累积量/微地震监测/一维切片Key words
parameter estimation/noise suppression/three-order cumulants/microseismic monitoring/one dimensional slice分类
能源科技引用本文复制引用
陈祖斌,刘昕,孙锋,吕昊,王东鹤..基于三阶累积量一维切片的微地震信号时延估计[J].湖南大学学报（自然科学版）,2016,43(8):120-127,8.基金项目
国家自然科学基金资助项目（41074074，41074082，41304139），National Natural Science Foundation of China （）
