绕射波信息提取与成像技术研究——以某盆地海相碳酸盐岩为例

绕射波是提高地震分辨率或超分辨率的重要信息载体,绕射波的提取与成像技术是地震勘探提取小尺度异常体的有效途径。基于传统的反射成像的处理过程没有充分地利用到绕射信息,特别是一些常规处理方法通常对绕射信息有着压制作用。为了进一步提高地震资料中绕射波的使用效率,重点研究了在成像道集上采用预测反演算法对绕射波进行提取与成像,并以某盆地海相碳酸盐岩缝洞储层的实际地震资料进行验证。结果显示,就地下小尺度异常体而言,该种绕射波分离成像技术可以较好地将绕射波信息提取出来,对小尺度异常体进行了高精度的重现,具有一定的现实应用价值。

Research on diffraction wave information extraction and imaging technology:an example of marine carbonate strata in a basin

Diffraction wave is an important information carrier to improve seismic resolution or super resolution.Diffraction wave extraction and imaging technology is an effective method to extract the information of small scale anomalous body in seismic exploration.Because diffraction information is not fully utilized in the traditional reflection imaging process,especially some conventional processing methods usually suppress diffraction information.In order to further improve the utilization efficiency of diffraction wave in seismic data,this paper mainly studies the separation and imaging of diffraction wave by using predictive inversion algorithm on imaging channel set,and validates with the actual seismic data of marine carbonate rock fracture-cavern reservoir in a basin.The result shows that the diffraction wave separation imaging technology can extract the diffraction information well and reproduce the small-scale anomalous bodies with high precision for the certain practical application value.