高精度相位相关速度分析技术在海上地震资料中的应用
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摘要
海上复杂构造区地震资料数据信噪比低,以叠加能量法为主的常规速度分析方法其速度分辨率和精度不能满足精细处理的要求。以南海东部某工区为靶区,对比研究了高精度相位相关速度分析法与常规叠加能量速度分析法,前者提高了速度谱在空间和时间上的精度,得到效果较好的地震叠加剖面,特别是低信噪比区域的成像精度有较大提高。
The marine seismic data have low signal-to-noise ratio.It impacts the velocity resolution with conventional stack energy velocity analysis method far from meeting the requirements of the fine processing.At the working area of the South Sea,we compared the phase correlation statistics analysis velocity method with conventional stack energy velocity analysis,and used the former method to improve the accuracy of the velocity spectrum in space and time and acquired better effects of the seismic stack profile.Especially the imaging accuracy is improved greatly in low SNR region.
The marine seismic data have low signal-to-noise ratio.It impacts the velocity resolution with conventional stack energy velocity analysis method far from meeting the requirements of the fine processing.At the working area of the South Sea,we compared the phase correlation statistics analysis velocity method with conventional stack energy velocity analysis,and used the former method to improve the accuracy of the velocity spectrum in space and time and acquired better effects of the seismic stack profile.Especially the imaging accuracy is improved greatly in low SNR region.
引文
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[4]赵悦伊,刘洋,刘财,等.差异散射多次波自适应消减法研究[J].世界地质,2012,31(2):399-405.ZHAO Yue-yi,LIU Yang,LIU Cai,et al.Research onadaptive substraction of different diffractive multiple wave[J].Global Geology,2012,31(2):399-405.
[5]胡英,张研,陈立康,等.速度建模的影响因素与技术对策[J].石油物探,2006,45(5):503-507.HU Ying,ZHANG Yan,CHEN Li-kang,et al.Infulenc-ing factors and technical strategies for velocity modeling[J].Geophysical Prospecting for Petroleum,2006,45(5):503-507.
[6]张营,刘财,刘洋,等.含AVO效应的转换波速度分析方法[J].世界地质,2012,31(2):383-388.ZhANG Ying,LIU Cai,LIU Yang,et al.Method of con-verted wave velocity analysis with AVO effect[J].Glob-al Geology,2012,31(2):383-388.
[7]李阳,吕庆田,韩立国,等.串联去噪技术在金属矿地震勘探中的应用[J].世界地质,2012,31(2):406-411.LI Yang,LQing-tian,HAN Li-guo,et al.Applicationof serial de-noise method in seismic exploration of metalmine[J].Global Geology,2012,31(2):406-411.
[8]潘宏勋,方伍宝.地震速度分析方法综述[J].勘探地球物理进展,2006,29(5):305-311.PAN Hong-xun,FANG Wu-bao.Review of seismic ve-locity analysis methods[J].Progress in Exploration Geo-physics,2006,29(5):305-311.
[9]王立明,刘宝华,李庆春.一种有效的速度分析方法[J].地球科学与环境学报,2008,30(1):80-82.WANG Li-ming,LIU Bao-hua,LI Qing-chun.An effec-tive method of velocity analysis[J].Journal of Earth Sci-ences and Environment,2008,30(1):80-82.
[10]Garotta R,Michon D.Continuous analysics of the veloc-ity function of the normal moverout correctious[J].Ge-ophysical Prospecting,1967,15(4):584-597.
[11]王德利,何樵登,韩立国.相位相关统计高分辨率速度分析[J].石油地球物理勘探,2001,36(2):198-204.WANG De-li,HE Qiao-deng,HAN Li-guo.High-reso-lution velocity analysis by phase correlation statistic[J].Oil Geophysical Prospecting,2001,36(2):198-204.
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