【摘要】 本文将地震反射资料成像的Kirchhoff偏移方法引入到接收函数成像研究,提出了一种接收函数的Kirchhoff偏移方法,以适应介质速度的横向变化,提高接收函数成像的精度和分辨率.模型检验表明,与传统的水平分层的共转换点偏移叠加方法相比,Kirchhoff偏移方法能够实现转换波的有效归位,消除水平分层共转换点偏移叠加造成的假象.一个很重要的现象是,倾斜或弯曲界面的成像明显受控于远震的入射方向,其成像精度的提高有赖于不同方向接收函数的联合成像.更多还原

【Abstract】 We extend seismic reflection Kirchhoff migration to receiver function study, to adapt to lateral velocity variation and improve the precision and resolution of receiver function migration. The model experiment shows that Kirchhoff migration can implement effective image of converted phases, remove the fictious image, in contrast to ray-based horizontal common-converted-point stacking method. We note that imaging dipping or curving interface is controlled by teleseismic azimuth, and receiver functions from different direction should be jointed to better resolve those complicated structures.更多还原