Decoupled elastic Gaussian beam migration for rugged topography

作者：Huang Jianping; Yuan Maolin; Duan Xinyi; Li Zhenchun; Liu Bin; Yue Yubo

来源：Oil Geophysical Prospecting, 2015, 50(3): 460-468.

DOI：10.13810/j.cnki.issn.1000-7210.2015.03.011

• Complex topographies
• Cross correlations
• Decoupled
• Elastic gaussian beams
• Plane-wave components
• Rugged topography
• Seismic exploration
• Surface elevations

As the development of the seismic exploration, not only acoustic P wave gathers but also elastic wave gathers are inputs for data imaging. Based on surface elevation, surface dip angle, and unseparated multi-component data, we derive decoupled backward-continued vector wavefiled extrapolation formula in terms of elastic-dynamic Gaussian beams by directly decomposing local plane-wave components from complex topography. According to the cross-correlation imaging condition and polarization features of vector wavefield, we obtain PP and polarity-corrected PS migration formulas. We test the proposed method by analyzing elastic wave phenomenon and migrated images, and extracting the ADCIGs from different CDPs for a characteristic rugged topography model data. Numerical results demonstrate the accuracy and flexibility of the method.

• 出版日期2015
• 单位中国石油大学（华东）