射线法模拟分析井间地震观测的波场特征

Ray tracing method simulating crosswell seismic data and analysis the characteristic of the wavefield

按照井间地震的观测系统,用改进的突变点加插值射线追踪方法,追踪每炮每道的射线路径,计算几种主要类型的波沿射线路径的波至时间和射线振幅,制作井间地震多炮多道水平分量和垂直分量的合成记录.并将合成记录选排为井间共炮点道集、共接收点道集、共偏移距道集和共中心深度点道集,系统地分析了不同道集内几种主要类型的地震波的传播特征.对野外观测的实际井间地震记录进行了模拟,从复杂的井间地震记录中,识别出井间地震实际观测到的不同类型的波场,为随后的井间地震资料处理和应用提供了依据.

According to the special geometry of crosswell seismic, we traced the raypaths of multichannal from sources to receivers with the improved raytracing method of interpolation between two jump points and calculated the arrival time, amplitude, and created crosswell seismic synthetic data with convolutional model, we sorted the synthetic records to common source ,common receive ,common midpoint ,common offset domain ,and analysis the kinematical and dynamic propagation characteristics of the predominant wave modes in different sorted gather spaces. We simulated field crosswell seismic with the ray tracing method, which provide warranties for wavefield identification, wavefield separation and wavefield parameters distilling and the crosswell seismic data utilization.