基于波动方程正演模拟的偏移孔径分析

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英文篇名：Analysis of the migration aperture of the forward modeling based on acoustic wave equation 中文刊名：大庆石油地质与开发 英文刊名：Petroleum Geology & Oilfield Development in Daqing 作者：吴清岭 ; 赵海波 ; 李来林 ; 范兴才 ; 李延峰 英文作者：WU Qing-ling~(1 ; 2) ; ZHAO Hai-bo~2 ; LI Lai-lin~2 ; FAN Xing-cai~2 ; LI Yan-feng~2 (1.Research Institute of Geology and Geophysics of China Academy of Sciences ; Beijing 100029 ; China ; 2.Research Institute of Exploration and Development of Daqing Oilfield Limited Company ; Daqing 163712 ; China) 中文关键词：正演模拟 ; Kirchhoff偏移 ; 偏移距 ; 偏移孔径 英文关键词：forward modeling ; Kirchhoff migration ; offset distance ; migration aperture 出版日期：2008-12-01 机构：中国科学院地质与地球物理研究所;大庆油田有限责任公司勘探开发研究院; 年：2008 期：06 出版单位：大庆石油地质与开发

摘要

采用声波波动方程正演模拟方法激发单炮地震记录,用Kirchhoff叠前深度偏移对激发的单炮记录进行成像,讨论了不同偏移距范围地震数据和不同偏移孔径对地震成像效果的影响;对实际连片地震资料进行了Kirchhoff叠前时间偏移处理。结果显示,适当的大偏移孔径下,相邻区块互相贡献使深层陡倾角地层成像效果明显改善。研究成果对实际地震资料叠前偏移处理提供了依据。
Single-shot seismic record is obtained by the forward modeling method of acoustic wave equation and its imaging is received with the help of Kirchhoff pre-stack depth migration.The influences of different offset data and different migration apertures on seismic imaging effects are discussed;Kirchhoff pre-stack time migration processing for actual multiple-block-jointed data is conducted.The results show that under the condition of properly large migration aperture mutual contribution of the adjacent blocks can obviously improve the imaging effects of deep steep dip formation.The above studied results possess important significance for the pre-stack migration process of actual seismic data.

引文

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