利用点扩散函数的深度域地震记录合成方法

Seismogram synthetizing in the depth-domain with point spread function

叠前深度偏移已是现今主流成像技术,然而在深度域难以合成地震记录,造成层位标定和确定性地震储层反演无法在该域完成。深度域成像结果通过深时转换到时间域完成解释,导致解释流程复杂,影响工作效率。为此,提出一种点扩散函数非稳态褶积深度域合成地震记录方法。文中介绍了该方法的基本原理,从时间域子波引出空间域点扩散函数,并详述了点扩散函数的非稳态褶积模型深度域合成记录制作方法。理论模型测试和实际数据应用结果表明,该方法能实现深度域合成记录的制作,且具有较高精度。

Currently the prestack depth migration(PSDM)becomes the prevailing imaging technology.But the seismic data interpretation and reservoir inversion are still been carried out in the time domain due to the hardness of depth domain seismogram synthetizing.It leads complex workflows and low efficiency.To tackle this problem,we propose a depth domain seismogram synthetizing approach based on unstationary convolution with point spread function(PSF).First,the basic principle of the proposed approach is discussed and the PSF in the spatial domain is derived from the time domain wavelet.Then the depth domain seismogram synthetizing of the PSF unsteady convolution model is presented.Model and real data tests prove the feasibility and accuracy of proposed approach.