面向南海北部中生界地质目标的宽频高精度准三维处理集成技术

南海北部中生界构造地质条件较新生界复杂，常规的二维地震资料成像较差，严重制约了油气勘探目标的落实。针对上述问题，在南海北部潮汕坳陷中生界A目标区开展了准三维地震处理技术攻关，形成了以自举法τ-p域稀疏反演鬼波压制技术、SWMA+SRME+RADON组合去多次波、匹配追踪傅里叶变换五维面元规则化和基于全波形反演(FWI)断控层析速度建模的高斯束叠前深度偏移(CBM)为核心的宽频高精度准三维处理集成技术。处理结果揭示：A目标区中生界地震资料品质得到显著改善，地层内部反射波组特征和断层发育特征清晰，为A目标区中生界圈闭落实和油气勘探潜力评价奠定了坚实基础。该宽频高精度准三维处理集成技术是一套能服务于南海北部潮汕坳陷复杂海况、复杂构造背景的油气资源调查的实用技术，可望为全球类似海域目标的油气调查提供重要的参考。

Integrated broadband and high-precision quasi-3D processing technology for geological targets in the Mesozoic of the northern South China Sea

As the structural and geological conditions of the Mesozoic of the northern South China Sea are more complex than those of the Cenozoic, conventional two-dimensional seismic data offers poor i-maging quality, which heavily restricts the implementation of oil and gas exploration targets. In response to the above problem, this study focused on tackling key issues for a quasi-three-dimensional (quasi-3D) seismic processing technology by investigating Target A in the Mesozoic of the Chaoshan Depression in the northern South China Sea and developed an integrated broadband and high-precision quasi-3D processing technology with the following technologies as its core: the τ-p-domain sparse inversion-based ghost wave attenuation by the bootstrap method, multiple elimination with the shallow water multiple attenuation (SWMA) + surface related multiple elimination (SRME) + Radon combination, 5D bin regularization by ma-tching pursuit and Fourier transform, and Gaussian beam prestack depth migration (CBM) based on velocity modeling combining full-waveform inversion (FWI) with fault-controlled tomographic inversion. The processing results reveal that the quality of the Mesozoic seismic data of Target A has been significantly improved, and the characteri-stics of the reflected wave groups and the development of faults in the formations are clear. This lays a solid foundation for the implementation of the Mesozoic traps in Target A and the evaluation of its oil and gas exploration potential. The proposed integrated broadband and high-precision quasi-3D processing technology is a set of practical technologies that well serve the oil and gas resource survey in the Mesozoic of the Chaoshan Depression in the northern South China Sea with complex sea conditions and complex structures. It also provides an important reference for oil and gas survey of similar marine targets around the world.