An improved method for location of microseismic events with low signal-to-noise ratios

被引：0

作者：

Tan, Yuyang ^{[1
]}

He, Chuan ^{[1
]}

Hou, Xiaochen ^{[1
]}

机构：

[1] Peking University, Beijing

来源：

Exploration Geophysics | 2015年 / 2015卷 / 01期

关键词：

grid search algorithm; microseismic source location; objective function; polarization attribute; probability distribution function; signal-to-noise ratio;

D O I：

10.1071/ASEG2015AB227

中图分类号：

学科分类号：

摘要：

An improved method is proposed in this paper for microseismic source location. The primary goal of this method is to improve the location accuracy for microseismic events with low signal-to-noise ratios (SNR). In contrast to the prevalent location approach, two innovations are implemented in the proposed method. First, instead of using the hodogram, the source azimuth is estimated from a probability distribution function, and second, a new objective function is employed in grid search algorithm to find the source position. The proposed method has been tested using synthetic data examples. The results show that, for these cases, the absolute errors of the estimated source azimuth and position are less than 1° and 3m, respectively, which proves that an improvement in location accuracy can readily be achieved using the proposed method. © 2015, Taylor and Francis. All rights reserved.

引用