Wide/narrow azimuth acquisition footprints and their effects on seismic imaging  

作　　者：Di Bangrang Xu Xiucang Wei Jianxin 

机构地区：[1]Key Laboratory of CNPC Geophysical Exploration, China University of Petroleum, Beijing 102249, China [2]State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing 102249, China [3]Key Laboratory of Earth Prospecting and Information Technology, China University of Petroleum, Beijing 102249, China

出　　处：《Petroleum Science》2008年第4期308-313,共6页石油科学（英文版）

基　　金：Heterogeneous formation geophysical response characteristics (973 Program, subject number: 2007CB209601);Continental reservoir seismic physical model (CNPC Fundamental Research Projects, subject number: 06A10102)

摘　　要：Acquisition footprint is a new concept to describe the seismic noise in three-dimensional seismic exploration and it is closely related to geometry and observation shuttering. At present, the study on acquisition footprints has become a hot spot. In partnership with the Dagang Oilfield, we used the channel sand body seismic physical model to study the characteristics of wide/narrow azimuth acquisition footprints and analyzed and compared the two types of footprints and their effects on target imaging. In addition, the footprints caused by data processing of the normal moveout offset （NMO） stretching aberration were discussed. These footprints are located only in the shallow or middle layer in the time slice, and possibly affect the imaging of shallow target layers, and have no influence on deep target imaging. Seismic physical modeling has its advantages in the study of acquisition footprints.Acquisition footprint is a new concept to describe the seismic noise in three-dimensional seismic exploration and it is closely related to geometry and observation shuttering. At present, the study on acquisition footprints has become a hot spot. In partnership with the Dagang Oilfield, we used the channel sand body seismic physical model to study the characteristics of wide/narrow azimuth acquisition footprints and analyzed and compared the two types of footprints and their effects on target imaging. In addition, the footprints caused by data processing of the normal moveout offset （NMO） stretching aberration were discussed. These footprints are located only in the shallow or middle layer in the time slice, and possibly affect the imaging of shallow target layers, and have no influence on deep target imaging. Seismic physical modeling has its advantages in the study of acquisition footprints.

关 键 词：Wide/narrow azimuth geometry acquisition footprint stretching aberration time slice seismic imaging 

分 类 号：P315[天文地球—地震学]