Staining algorithm-based reverse time migration imaging for pre-salt structures

ZHAO Guo-Yong; ZHANG Jian; LIU Chang; REN Yi; XING Bo-Shen; LI Zi-Zheng; QU Ying-Ming

doi:10.11720/wtyht.2024.1286

2024 Vol. 48, No. 4

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ZHAO Guo-Yong, ZHANG Jian, LIU Chang, REN Yi, XING Bo-Shen, LI Zi-Zheng, QU Ying-Ming. 2024. Staining algorithm-based reverse time migration imaging for pre-salt structures. Geophysical and Geochemical Exploration, 48(4): 1086-1093. doi: 10.11720/wtyht.2024.1286

Citation:

ZHAO Guo-Yong, ZHANG Jian, LIU Chang, REN Yi, XING Bo-Shen, LI Zi-Zheng, QU Ying-Ming. 2024. Staining algorithm-based reverse time migration imaging for pre-salt structures. Geophysical and Geochemical Exploration, 48(4): 1086-1093. doi: 10.11720/wtyht.2024.1286

Staining algorithm-based reverse time migration imaging for pre-salt structures

1.R& D Center of Science and Technology, Sinopec Geophysical Corporation, Nanjing 210005, China;
2. Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China ), Qingdao 266580, China;
3. School of Geosciences, China University of Petroleum (East China ), Qingdao 266580, China

More Information

Corresponding author: QU Ying-Ming

Received Date: 20 July 2023

Revised Date: 28 March 2024

Abstract

Abstract

The reverse time migration (RTM) technique can accurately simulate the propagation of seismic waves in subsurface media and image subsurface structures.However, seismic waves can be reflected, refracted, or scattered in weakly illuminated areas, leading to locally reduced signal-to-noise ratios (SNRs) in RTM imaging results.The staining algorithm can achieve the tracking and imaging of known geobodies by generalizing the wave equation to the complex domain.It requires a conventional real velocity and an imaginary velocity field as inputs.A conventional staining algorithm requires known real subsurface structures, which is impractical in this study.Hence, this study put forward regional staining to promote the practical development of the staining algorithm.Focusing on subsalt imaging, this study proposed a staining algorithm-based RTM imaging method for subsalt structures.The salt dome model demonstrated that the method proposed in this study can significantly improve the imaging SNRs and resolution of self-selected target regions.
- illumination improvement /
- staining algorithm /
- reverse time migration /
- pre-salt imaging

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References

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