| 拟合法15°波动方程有限差分串联偏移 |
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| 引用本文： | 陈静,赵振飞,张叔伦. 拟合法15°波动方程有限差分串联偏移[J]. 地球物理学报, 1993, 36(5): 651-656 |
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| 作者姓名： | 陈静 赵振飞 张叔伦 |
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| 作者单位： | 石油地球物理勘探局研究院方法所石油地球物理勘探局研究院方法所, 涿州 072750 |
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| 基金项目： | 国家自然科学基金会;中国科学院;石油天然气总公司;大庆石油管理局联合资助的课题 |
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| 摘 要： | 本文把最佳拟合算法（三点和五点差分格式）及串联偏移方法应用在15°波动方程偏移中。由于拟合法的差分因子随着采样间隔、步长、速度等参数的变化而变化,因此与原有的波动方程差分偏移法相比,串联偏移方法能有效的使大倾角归位,克服频散,速度及步长可以灵活变化,运算效率高等优点。
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| 关 键 词： | 拟合法求解差分因子 15°方程串联偏移 三点和五点差分格式 |
| 收稿时间： | 1991-11-09 |
15?FINITE DIFFERENCE WAVE EQUATION CASCADE MIGRATION USING FITTING METHOD |
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| CHEN JING ZHAO ZHEN-FEI ZHANG SHU-LUN. 15?FINITE DIFFERENCE WAVE EQUATION CASCADE MIGRATION USING FITTING METHOD[J]. Chinese Journal of Geophysics, 1993, 36(5): 651-656 |
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| Authors: | CHEN JING ZHAO ZHEN-FEI ZHANG SHU-LUN |
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| Affiliation: | Geophysical Research Institute, Bureau of Geophysical Prospecting, P. O. Box 11-3, Zhuozhou 072750 |
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| Abstract: | This paper discusses the implementation of the optimal fitting algorithm (3-point and 5-point difference schemes) and cascade migration Since the difference operator of the fitting method varies with the sample interval,step length and velocity,etc.,the cascade migration can effectively move the reflector with large dip into its true subsurface position.Compared with the conventional difference method,the fitting method has the advantages of low frequency dispersion,flexible selection of velocity and step length and of high computation efficiency. |
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| Keywords: | 3-point and 5-point difference schemes 15?finite difference wave equation cascade migration Fitting method difference operator |
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