一种高效稳定的三维叠前插值技术及应用

叠前道内插方法可以改善地震数据空间采样不足对叠前处理和偏移成像造成的不利影响。实际地震资料处理时叠前地震道插值,不但要精度高、适应性强,而且还要速度快,同时不能导致地质假象。为此,将计算效率较高的二维半步长预测滤波插值方法拓展应用到三维叠前资料处理,形成了一种可用于三维叠前数据加密的广义f-x,y域半步长预测插值方法,给出了几种用于炮集数据加密的实现方式。数值试验和实际数据应用展示了方法的实用性。该方法可以对具有空间假频的地震道进行内插,内插出的地震道波形自然。将其应用于三维炮集数据加密,有助于改善地震成像质量。

The prestack trace interpolation method can improve the negative effect of lack sampling seismic data on prestack processing and migration imaging.In practice,the requirements of prestack seismic trace interpolation are strict,which desires not only high accuracy and strong adaptability,but also high efficiency.Any geological artifacts can’t be generated after interpolation.For the purpose,we extend the 2D half-step operator prediction interpolation method which has higher computational efficiency to the application of 3D prestack trace interpolation,and realize a generalized f-x,y half-step prediction operator interpolation method which can be used to increase the sampling density of 3D prestack seismic data,and propose several implementations to increase the space sampling density of shot gathers.Synthetic and actual data examples show the method is practical and can be used in the interpolation of seismic trace with spatial aliasing,and the waveform of interpolated seismic trace is natural,and its application to 3D shot gathers is helpful to improve seismic imaging quality.

国家科技重大专项(2011ZX05019-003)和中国石油天然气集团公司物探新方法新技术研究项目(2013A-3602-01)联合资助。