基于模型的炮检距均衡方法

利用完全形式的Zoeppritz方程,制作了具有不同地层参数的理论模型,研究振幅随炮检距的变化特征.研究文中所提出的炮检距均衡方法,目的是要校正剩余振幅误差,即在做完与炮检距有关的处理后依然存在的振幅误差.炮检距均衡是通过确定实际背景地震反射的AVO响应与相应理论模型的AVO响应之间的关系,求取校正系数,然后对地震资料进行校正,校正后可以突出真正的AVO响应.

THE OFFSET BALANCING METHOD BASED ON A MODEL

In the paper,we make use of complete Zoeppritz equation to make theoretical models corresponded to different stratum parameters , and study the amplitude variation characteristic with offset. The offset balancing method studied in the paper attempts to rectify residual amplitude errors,which still remain after the many offset-dependent processing steps are completed. Offset balancing is to quantify the relationship between the AVO response of background seismic reflections and the AVO response of corresponding theoretical models ,and to quantify the calibrating coefficients ,then to calibrate the seismic data. The true AVO response can be highlighted in the calibrated data.