逆时偏移双向照明波场分离成像条件  

Decomposition imaging condition of reverse time migration bi-directional illumination wavefield

作　　者：张思萌[1] 韩立国[1] 于晨霞 ZHANG Si-meng HAN Li-guo YU Chen-xia(College of Geo-exploration Science and Technology, Jilin University, Changchun 130026, China)

机构地区：[1]吉林大学地球探测科学与技术学院,长春130026

出　　处：《世界地质》2017年第2期602-608,共7页World Geology

基　　金：国家高新技术发展规划(863计划)重大项目课题(2014AA06A605)

摘　　要：通过对波场分离互相关成像条件与炮-检点双向照明互相关成像条件进行研究,将两种方法在噪声消除和补偿成像振幅畸变方面的优势进行结合,提高成像分辨率,改进现有成像条件。其主要步骤是将震源和检波点波场分离成它们的单程波传播分量,采用双向照明补偿互相关成像条件对需要的波场进行成像。通过对模型试算,验证了笔者提出的成像条件能有效的压制噪音,补偿成像振幅。Through the study of cross-correlation imaging conditions between wavefield decomposition and source-receiver bi-directional illumination, the authors combine the imaging advantages of two methods in the noise elimination and amplitude distortion compensation to increase the imaging resolution and improve the existing ima-ging conditions. The main procedures include separating source and receiver wave fields into one-way wave compo-nents and adopting bi-directional illumination compensation cross-correlation imaging condition to image the wave- fields. Model trial validates that the imaging conditions proposed can effectively suppress noise and compensate im-aging amplitude.

关 键 词：逆时偏移 成像条件 照明补偿 波场分解 

分 类 号：P631.443[天文地球—地质矿产勘探]