石油物探2012，Vol.51Issue(5)：469-475,7.DOI:10.3969/j.issn.1000-1441.2012.05.008
高斯束深度偏移的实现与应用研究
Realization and application of Gaussian beam depth migration
摘要
Abstract
The Gaussian beam is the solution of paraxial approximation equation achieved in ray-centered coordinate. The Gaussian beam depth migration (GBM) contains the single Gaussian beam solution and the imaging stack by all Gaussian beams. The single Gaussian beam is obtained in two steps, including kinematical ray tracing to get ray-path & traveling-time of central ray and dynamic ray tracing to get high-frequency energy near central ray. Wavefield propagation characterization by using independently-individual Gaussian beam preserves the kinematical characteristics while it keeps the dynamic characteristics of wavefield. By utilizing the independently-individual Gaussian beam for imaging stack, GBM can solve the multi-path problem for ray-tracing methods; meanwhile, it is characterized by the flexibility of first-arrival Kirchhoff integral migration and the accuracy of wave equation migration. In addition,GBM isn't restricted by dip, while avoids the static correction problem and improves the imaging accuracy in rugged topography. Theoretical model and actual data proved the effectiveness and advantages of the technique.关键词
高斯束/射线追踪/深度偏移/起伏地表Key words
aussian beam/ ray-tracing/ depth migration/ rugged topography分类
天文与地球科学引用本文复制引用
蔡杰雄,方伍宝,杨勤勇..高斯束深度偏移的实现与应用研究[J].石油物探,2012,51(5):469-475,7.基金项目
国家科技重大专项(2011ZX05014-001-002)专题"碳酸盐岩缝洞型储层高分辨率地震成像技术研究"项目资助. （2011ZX05014-001-002）
