基于共成像点道集评价的偏移速度建模
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摘要
偏移速度建模的准确性直接影响叠前深度偏移成果的质量。本文以叠前深度偏移为基础,采用批量计算并结合计算机可视化交互方法做层速度分析。交互分析中能实时评判每个速度点的正确性,并根据剩余曲率准则进行动态调整。为了避免单点分析的不足和炮域多射线路径问题的不确定性,利用从交互分析得到的偏移速度进行真振幅叠前深度偏移,抽取共成像点道集,以此评价交互分析的质量,为波动方程叠前深度偏移提供合理、可靠的偏移速度模型。鉴于偏移速度分析的巨大计算量问题,采用多层次并行计算可达到较高效率,更具实用性。实际地震数据处理结果验证了本文偏移速度建模方法的可行性和有效性。
The accuracy of migration velocity modeling directly affects the quality of pre-stack depth migration.Based on pre-stack depth migration,the batch computing and visualization method were used to conduct interval velocity analysis.In interactive analysis the accuracy of every velocity point can be evaluated in real time,and can be adjusted dynamically based on residual curvature criterion.In order to avoid shortage of single point analysis and uncertainty of shot domain multi-ray path problem,the migration velocity picked up from interactive analysis were used to conduct true amplitude pre-stack depth migration,by sorting common imaging point gathers,the quality of interactive analysis was evaluated,so the reasonable and reliable migration model was provided for wave equation pre-stack depth migration.For huge calculation in migration velocity analysis,the multi-layer parallel computing can achieve higher efficiency,and it is more practical.Field seismic data processing results verified feasibility and effectiveness of the migration velocity modeling method introduced in this paper.
The accuracy of migration velocity modeling directly affects the quality of pre-stack depth migration.Based on pre-stack depth migration,the batch computing and visualization method were used to conduct interval velocity analysis.In interactive analysis the accuracy of every velocity point can be evaluated in real time,and can be adjusted dynamically based on residual curvature criterion.In order to avoid shortage of single point analysis and uncertainty of shot domain multi-ray path problem,the migration velocity picked up from interactive analysis were used to conduct true amplitude pre-stack depth migration,by sorting common imaging point gathers,the quality of interactive analysis was evaluated,so the reasonable and reliable migration model was provided for wave equation pre-stack depth migration.For huge calculation in migration velocity analysis,the multi-layer parallel computing can achieve higher efficiency,and it is more practical.Field seismic data processing results verified feasibility and effectiveness of the migration velocity modeling method introduced in this paper.
引文
[1]李振春,姚云霞等.波动方程法共成像点道集偏移速度分析建模.地球物理学报,2003,46(1):86～93
[2]王成祥,张关泉,刘超颖等.速度模型反演的CFP方法.石油地球物理勘探,2003,38(2):139～146
[3]李录明,罗省贤.相移加校正叠前深度偏移及偏移速度分析.石油地球物理勘探,1997,32(1):57～67
[4]李录明,罗省贤.相移加校正变范围三维叠前深度偏移.成都理工学院学报1999,26(4):229～333
[5]刘定进,印兴耀.基于双平方根方程的保幅地震偏移.石油地球物理勘探,2007,42(1):11～16
[6]Prucha M,Biondi B and Symes W W.Angle-domain commoni mage gathers by wave equtation migration.SEG Technical Program Expanded Abstracts,1999,18:824～827
[7]Biondi B and Symes W W.Angle-domain common-i m-age gathers for migration velocity analysis by wave field continuation i maging.Geophysics,2004,69(5):1283～1298
[8]Sava P C,Fomel S.Angle-domain common-i mage gathers by wavefield continuation methods.Geophys-ics,2003,68(3):1065～1074
[9]李振春,朱莉,叶月明等.角度域共成像点道集的提取与叠加成像.石油物探,2008,47(6):565～572
[10]胡英,张研,陈立康.速度建模的影响因素与技术对策.石油物探,2006,45(5):503～507
[11]曹文俊,李振春,韩文功.波动方程叠前深度偏移对速度模型的敏感性分析.天然气工业,2007,27(S1):120～122
[12]勾丽敏,蔡希玲,刘学伟等.噪声对叠前深度偏移层速度精度的影响分析.石油地球物理勘探,2007,42(2):156～163
[13]陈辉,李录明,罗省贤.基于保幅延拓算子的共成像点道集敏感性分析.西南石油大学学报(自然科学版),待刊
[14]罗省贤,李录明.交互三维速度模型建立方法及软件系统的实现.成都理工学院学报,1999,26(1):42～47
[15]罗省贤,李录明.三维叠前深度偏移速度模型建立方法.石油物探,1999,38(4):1～6
[16]李录明,罗省贤.SSR与DSR组合的波动方程速度建模方法及应用.石油地球物理勘探,2009,44(5):630～636
[2]王成祥,张关泉,刘超颖等.速度模型反演的CFP方法.石油地球物理勘探,2003,38(2):139～146
[3]李录明,罗省贤.相移加校正叠前深度偏移及偏移速度分析.石油地球物理勘探,1997,32(1):57～67
[4]李录明,罗省贤.相移加校正变范围三维叠前深度偏移.成都理工学院学报1999,26(4):229～333
[5]刘定进,印兴耀.基于双平方根方程的保幅地震偏移.石油地球物理勘探,2007,42(1):11～16
[6]Prucha M,Biondi B and Symes W W.Angle-domain commoni mage gathers by wave equtation migration.SEG Technical Program Expanded Abstracts,1999,18:824～827
[7]Biondi B and Symes W W.Angle-domain common-i m-age gathers for migration velocity analysis by wave field continuation i maging.Geophysics,2004,69(5):1283～1298
[8]Sava P C,Fomel S.Angle-domain common-i mage gathers by wavefield continuation methods.Geophys-ics,2003,68(3):1065～1074
[9]李振春,朱莉,叶月明等.角度域共成像点道集的提取与叠加成像.石油物探,2008,47(6):565～572
[10]胡英,张研,陈立康.速度建模的影响因素与技术对策.石油物探,2006,45(5):503～507
[11]曹文俊,李振春,韩文功.波动方程叠前深度偏移对速度模型的敏感性分析.天然气工业,2007,27(S1):120～122
[12]勾丽敏,蔡希玲,刘学伟等.噪声对叠前深度偏移层速度精度的影响分析.石油地球物理勘探,2007,42(2):156～163
[13]陈辉,李录明,罗省贤.基于保幅延拓算子的共成像点道集敏感性分析.西南石油大学学报(自然科学版),待刊
[14]罗省贤,李录明.交互三维速度模型建立方法及软件系统的实现.成都理工学院学报,1999,26(1):42～47
[15]罗省贤,李录明.三维叠前深度偏移速度模型建立方法.石油物探,1999,38(4):1～6
[16]李录明,罗省贤.SSR与DSR组合的波动方程速度建模方法及应用.石油地球物理勘探,2009,44(5):630～636
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