CT理论与应用研究2026，Vol.35Issue(4)：643-652,10.DOI:10.15953/j.ctta.2026.027
南海南部深水区中深层地震成像关键技术及应用
The Key Technologies and Applications for Mid-deep Seismic Imaging in the Deep-water Area of the Southern South China Sea
摘要
Abstract
The deep-water area of the southern South China Sea is a crucial strategic successor zone for petroleum resources in China,and its exploration and development hold significant importance in ensuring national energy security.As exploration targets extend to greater depths,the quality of mid-to deep-seismic imaging has become a key constraint on understanding deep geological structures and identifying hydrocarbon reservoirs.Seismic data in this region face challenges such as a low signal-to-noise ratio(SNR)at low frequencies,a narrow effective bandwidth due to ghost-notch effects,and inaccurate velocity modeling in complex structural areas.To address these issues,this study proposes an integrated processing workflow that employs amplitude-preserving broadband noise attenuation technology to suppress low-frequency noise and improve low-frequency signal-to-noise ratio(SNR),applying adaptive de-ghosting technology to eliminate notch effects,broadening the effective bandwidth,and introducing a high-density dual-spectrum velocity analysis to construct an accurate anisotropic velocity model.Application to real data demonstrates that this combination of technologies effectively improves the quality of mid-to deep-seismic imaging.The clarity of deep reflective structures and the continuity of seismic events were significantly enhanced,providing a reliable geophysical data foundation for hydrocarbon exploration in deepwater areas.关键词
中国南海南部/中深层成像/宽频处理/低信噪比/鬼波压制/各向异性Key words
southern South China Sea/mid-to-deep imaging/broadband processing/low signal-to-noise ratio/de-ghosting/anisotropy分类
天文与地球科学引用本文复制引用
张浩浩,刘玉萍,邓桂林,康冬菊..南海南部深水区中深层地震成像关键技术及应用[J].CT理论与应用研究,2026,35(4):643-652,10.基金项目
国家重点研发计划(天然气水合物储层压裂防砂一体化方案设计及优化(2023YFC2811005)) （天然气水合物储层压裂防砂一体化方案设计及优化(2023YFC2811005）
广东省自然科学基金面上项目(南海西南次海盆中段残留洋中脊莫霍面弱反射成因机制研究(2023A1515010898)). （南海西南次海盆中段残留洋中脊莫霍面弱反射成因机制研究(2023A1515010898）
