基于射线追踪的微地震信号正演模型

Forward Modeling of Microseismic Signals Based on Ray Tracing

为了更准确地收集微地震信号,采用射线追踪的方法对多震源微地震数据进行正演模拟。首先根据射线追踪试射法原理,不断修正初始出射方向,通过反复迭代获得最优出射角,最终得到精确的射线路径以及多道合成微地震响应记录,实现正演过程。基于射线追踪的正演结果能准确地反映地层结构的运动学特征,是一种快速、准确的微地震正演方法。通过对地震波传播规律的分析,反演结果表明,建立的正演模型能为微地震信号处理、反演以及震源定位研究提供帮助。

In order to collect microseismic signals more accurately,ray tracing is used to simulate multi-source microseismic signals.First,we used the two-point ray tracing method to adjust the initial value,and then the optimal exit angle and corresponding ray trace are obtained,realizing full-wave ray tracing.Forward modeling of microseismic signals based on ray tracing can accurately reflect the kinematic characteristics of stratigraphic structures.It is a rapid and accurate forward modeling of microseismic signals method.By analyzing the regular of seismic wave propagation,the forward model established can provide some help for signal analysis and processing,inversion of microseismic data and source localization.