Matching correlation-function velocity analysis based on ADCIG
LI Jiang1, LI Qingchun2, TANG Wen3
1. Xi'an Research Institute, China Coal Technical & Engineering Group Corp, Xi'an, Shaanxi 710077, China; 2. School of Geological Engineering and Geoma-tics, Chang'an University, Xi'an, Shaanxi 710154, China; 3. School of Earth Sciences and Engineering, Xi'an Shiyou University, Xi'an, Shaanxi 710065, China
Abstract:Avoiding the multi-solution problem of wavefield propagation and being sensitive to errors of migration velocity,angle-domain common image gathers (ADCIG) are very suitable for migration velocity analysis.Residual depth equations suitable for inclined strata are derived based on kinematics properties of ADCIGs to satisfy the velocity analysis of complex structures.A matching correlation-function residual curvature spectrum algorithm is developed to obtain accurate residual curvature va-lues.Compared with stack and correlation methods,the proposed algorithm has better noise-resistance and a higher resolution,achieves more accurate velocity analysis.Model and real data tests prove the validity of the proposed algorithm.
Herve C,Emmanuel C.From migration to inversion velocity analysis[J].Geophysics,2017,82(3):S207-S223.
[2]
刘奇琳,刘伊克,常旭.双平方根波动方程偏移速度分析[J].地球物理学报,2009,52(7):1891-1898.LIU Qilin,LIU Yike,CHANG Xu.Wave equation migration velocity analysis by double square method[J].Chinese Journal of Geophysics,2009,52(7):1891-1898.
[3]
徐嘉亮,周东红,贺电波,等.高精度深度域层析速度反演方法[J].石油地球物理勘探,2018,53(4):737-744.XU Jialiang,ZHOU Donghong,HE Dianbo,et al.High-precision velocity tomography inversion in the depth domain[J].Oil Geophysical Prospecting,2018,53(4):737-744.
[4]
Guo B,Schuster G T.Wave-equation migration velocity analysis using plane-wave common-image gathers[J].Geophysics,2017,82(5):S327-S340.
[5]
李江.基于奇异值分解的角度域去噪方法[J].石油物探,2019,58(3):427-432.LI Jiang.Seismic denoising in the angle domain based on singular value decomposition[J].Geophysical Prospecting for Petroleum,2019,58(3):427-432.
[6]
Zhang Y,Biondi B.Moveout based wave equation migration velocity analysis[J].Geophysics,2013,78(2):U31-U39.
[7]
张广智,常德宽,王一惠,等.波动方程叠前深度偏移角度道集求取方法[J].石油地球物理勘探,2016,51(3):529-536.ZHANG Guangzhi,CHANG Dekuan,WANG Yihui,et al.Angle domain common-image gather calculation based on wave equation prestack depth migration[J].Oil Geophysical Prospecting,2016,51(3):529-536.
[8]
李海强,杨国权,李振春,等.基于局部平面波分解的逆时偏移角道集提取方法[J].石油地球物理勘探,2017,52(6):1177-1183.LI Haiqiang,YANG Guoquan,LI Zhenchun,et al.A method for extracting angle-domain common-image gathers based on local plane wave decomposition[J].Oil Geophysical Prospecting,2017,52(6):1177-1183.
[9]
Save P,Biondi B.Wave equation migration velocity analysis 1:Theory[J].Geophysics Prospecting,2004,52(6):593-606.
[10]
Stork C,Symes W.Kinematic artifacts in prestack depthmigration[J].Geophysics,2004,69(2):562-575.
[11]
Biondi B,William S.Angle domain common image gathers for migration velocity analysis by wave field continuation imaging[J].Geophysics,2004,69(5):1283-1298.
[12]
刘守伟,程玖兵,王华忠,等.炮检距域/角度域共成像点该道集与偏移速度的关系[J].地球科学——中国地质大学学报,2007,32(4):575-582.LIU Shouwei,CHENG Jiubing,WANG Huazhong,et al.Relationships between offset domain/angle domain common image gathers and migration velocity[J].Earth Science:Journal of China University of Geosciences,2007,32(4):575-582.
[13]
刘守伟,王华忠,程玖兵,等.时空移动成像条件及偏移速度分析[J].地球物理学报,2008,51(6):1883-1891.LIU Shouwei,WANG Huazhong,CHENG Jiubing,et al.Space-time shift imaging condition and migration velocity analysis[J].Chinese Journal of Geophysics,2008,51(6):1883-1891.
[14]
Zhang K,Li Z C,Zeng T S,et al.Residual curvature migration velocity analysis for angle domain common imaging gather[J].Applied Geophysics,2010,7(1):49-56.
[15]
徐嘉亮,常旭,王一博.角度与剩余深度对剩余速度的敏感性分析[J].地球物理学报,2015,58(8):2927-2934.XU Jialiang,CHANG Xu,WANG Yibo.Sensitivity analysis of the residual depth about the residual velocity in the angle domain[J].Chinese Journal of Geophysics,2015,58(8):2927-2934.
[16]
任芳,李振春,张敏,等.基于角道集的微分相似优化法偏移速度分析[J].物探与化探,2017,41(5):872-880.REN Fang,LI Zhenchun,ZHANG Min,et al.Diffe-rential semblance optimization migration velocity ana-lysis based on angle domain CIGs[J].Geophysical and Geochemical Exploration,2017,41(5):872-880.
高妍.几种速度分析方法的对比分析与应用[J].工程地球物理学报,2014,11(4):436-450.GAO Yan.Comparison of several velocity methods and application[J].Chinese Journal of Engineering Geophysics,2014,11(4):436-450.
[19]
Sava P,Fomel S.Angle-domain common-image ga-thers by wave field continuation methods[J].Geophy-sics,2003,68(3):1065-1074.
[20]
张建彬,林年添,张栋,等.基于非线性函数的速度谱智能拾取[J].地球物理学进展,2016,31(2):856-860.ZHANG Jianbin,LIN Niantian,ZHANG Dong,et al.Intelligent picking of velocity spectrum based on nonlinear function[J].Progress in Geophysics,2016,31(2):856-860.
[21]
Andrea T,Eusebio S,Alessia R,et al.High resolution coherency functional for velocity analysis:An application for subbasalt seismic exploration[J].Geophysics,2013,78(5):U53-U63.
[22]
王珊.层速度求取方法及速度谱横向密度对速度场精度的影响[J].石油地球物理勘探,2016,51(2):355-360,375.WANG Shan.Influences of interval velocity calculation method and spectrum lateral density on velocity field accuracy[J].Oil Geophysical Prospecting,2016,51(2):355-360,375.
[23]
刘国华.高分辨率归一化自举微分相似系数速度分析方法[J].石油物探,2014,53(5):530-536.LIU Guohua.High-resolution velocity analysis based on normalized bootstrapped differential semblance[J].Geophysical Prospecting for Petroleum,2014,53(5):530-536.
[24]
Al-Yahya K.Velocity analysis by iterative profile migration[J].Geophysics,1989,54(6):718-729.
[25]
张军华,藏胜涛,周振晓,等.地震资料信噪比定量计算及方法比较[J].石油地球物理勘探,2009,44(4):481-486.ZHANG Junhua,ZANG Shengtao,ZHOU Zhenxiao,et al.Quantitative computation and comparison of S/N ratio in seismic data[J].Oil Geophysical Prospecting,2009,44(4):481-486.
[26]
郑晓,薄华,孙强.QR分解与特征值优化观测矩阵的算法研究[J].智能系统学报,2015,10(1):149-155.ZHENG Xiao,BO Hua,SUN Qiang.An algorithm for measurement matrix based on QR decomposition and eigenvalue optimization[J].Transactions on Intelligent Systems,2015,10(1):149-155.