Tomographic velocity inversion for ADCIGs in areas with a rugged surface

作者：Zhang Kai^*; Li Zhen Chun; Zeng Tong Sheng; Qin Ning; Yao Yun Xia

来源：Applied Geophysics, 2012, 9(3): 313-318.

DOI：10.1007/s11770-012-0343-3

• Rugged surface
• angle-domain common image gathers
• tomographic inversion
• velocity modeling

Pre-stack depth migration velocity analysis is one of the key techniques influencing image quality. As for areas with a rugged surface and complex subsurface, conventional prestack depth migration velocity analysis corrects the rugged surface to a known datum or designed surface velocity model on which to perform migration and update the velocity. We propose a rugged surface tomographic velocity inversion method based on angle-domain common image gathers by which the velocity field can be updated directly from the rugged surface without static correction for pre-stack data and improve inversion precision and efficiency. First, we introduce a method to acquire angle-domain common image gathers (ADCIGs) in rugged surface areas and then perform rugged surface tomographic velocity inversion. Tests with model and field data prove the method to be correct and effective.

• 出版日期2012-6
• 单位中国石油大学（北京）