沁水盆地晋中地区古河道地震资料成像方法研究

Research on Imaging Method of Paleo-Channel Seismic Data of Jingzhong Area in Qinshui Basin

沁水盆地晋中地区位于黄土高原东部边缘,复杂山地和黄土塬并存,代表了我国华北地区最为典型的地形地貌。从该地区叠加剖面来看,目的层成像效果和所处的构造位置有很大的关系,古河道部位成像效果差。针对该区资料特点,采用静校正、叠前去噪、振幅恢复与补偿、叠加成像等技术,可提高古河道地区地震资料品质,进一步压缩古河道地震资料成像缺口。

Jingzhong area of Qinshui basin is at the eastern edge of Loess Plateau with characteristics of complicated mountain coexisting with loess tableland,which is the most typical landform in northern China.Its stacked section shows that imaging results of the target layer are greatly related to its structural situation and paleo-channel part has a poor imaging effect.Therefore,technologies including statics correction,pre-stack noise attenuation,amplitude recovery and compensation and stack imaging are suggested to improve seismic data quality and compress imaging gap of seismic data in Paleo-channel area.