Improved Phase Shift and Phase Shift Interpolation Method Research
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摘要: 为了对复杂地质体实现精确的偏移归位,在使用相移与相移插值方法时,成像质量和计算效率这两个因素是我们必须考虑的。为此针对实际中遇到的各种问题,对相移及相移插值方法进行了如下技术上的改进:讨论空间域内的动态边界吸收法;首次提出波数域滤波方法,这两种方法有效克服了端点效应并使计算效率显著提高;阐述小速度偏移方法并对相移因子进行分析实践证明二者明显改善了偏移剖面的成像质量。Abstract: In order to realize the precise complex geological body shift position, using phase shift and phase shift interpolation method, the imaging quality and computation efficiency are two factors we must consider. Therefore in view of the actual encountered in the various problems, following are the technical improvement of phase shift and phase shift interpolation method: A discussion of the space in the domain of the dynamic boundary absorption; First put forward wave number domain filtering method, above two kinds of method effectively avoid the endpoint effect and making the calculation efficiency improved significantly. The method of small speed migration and phase shift factor analysis described, both proved significantly improve the migration profile of the imaging quality.
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Keywords:
- phase shift /
- end effect /
- wave number domain filtering /
- low-speed migration /
- phase shift factor
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