井间层析成像混合最短射线追踪旅行时反演
|
摘要
传统的曲射线追踪方法存在一定的缺陷,弯曲法得到的旅行时可能收敛到局部最小而不是全局最小。为了使其得到较好的射线路径,本文介绍一种方法对弯曲法进行修改。其起始猜测路径采用由SPR得到的曲折射线,这样既可以获得全局最小走时,又避免了SPR方法的射线路径不够光滑,相当于对SPR所得射线路径做平滑处理。射线追踪路径实例和井间地震层析成像模型反演表明,这种混合方法效果很好。
The travel time by the bending method may be restricted to the local minimum instead of the whole minimum because there are certain drawbacks with the traditional ray tracing method. In order to get a better ray path. The paper introduces a method that can modify the bending method. The initial guess path will use the refraction ray from the shortest path ray(SPR)method, which not only can obtain the overall minimum travel time,but also can prevent the not enough smooth ray path by SPR method, because the method has smoothened the ray path from the SPR method. The hybrid method has a good effect on the ray tracing cases and the crosshole seismic tomography.
The travel time by the bending method may be restricted to the local minimum instead of the whole minimum because there are certain drawbacks with the traditional ray tracing method. In order to get a better ray path. The paper introduces a method that can modify the bending method. The initial guess path will use the refraction ray from the shortest path ray(SPR)method, which not only can obtain the overall minimum travel time,but also can prevent the not enough smooth ray path by SPR method, because the method has smoothened the ray path from the SPR method. The hybrid method has a good effect on the ray tracing cases and the crosshole seismic tomography.
引文
[1]John Vidale.Finite-difference calculation of travel ti mes[J].Bulletion of the Seismic Society of Ameri-ca,78(6):2062~2076.
[2]赵连锋.井间地震波速与衰减联合层析成像方法研究[D].成都理工大学,2002.
[3]吴律.层析成像及其在井间地震中的应用[M].北京:石油工业出版社,1993.82~94.
[4]TJ Moser.Shortest path calculation of seismic rays[J].Geophysics,1991,56(1):59~67.
[5]武斌,严忠琼,曹俊兴.平方慢度解析射线追踪层析成像[J].工程地球物理学报,2005,2(2):109~113.
[6]John E Vidale.Finite-difference calculation of travel ti me in three di mensions[J].Geophysics,1990,55(5):521~526.
[7]Qin F,Olsen K B,Cai W,et al.Finite-difference so-lution of eikonal equation along expanding wavefronts[J].Geophysics,1992,57(3):478~487.
[8]赵改善,郝守玲,杨尔皓,等.基于旅行时线性插值的地震射线追踪算法[J].石油物探,1998,37(2):14~24.
[9]张霖斌,刘迎曦,赵振峰,等.有限差分法射线追踪[J].石油地球物理勘探,1993,28(6):673~677.
[10]Robert L Coultrip.High accuracy wavefront tracing travelti me calculation[J].Geophysics,1993,58(2):284~292.
[11]刘洪,李幼铭.计算最小走时和射线路径的界面网全局方法[J].地球物理学报,1995,38(6):823~831.
[12]HarmJ A Van Avendonk,Alistair J Harding,John A Orcutt,et al.Hybrid shortest path and ray ben-ding method for travel and raypath calculations[J].Geophysics,2001,66(2):648~653.
[13]雷栋,胡祥云.地震层析成像方法综述[J].地震研究,2006,29(4):418~426.
[14]Michael J Jackson,Dary R Tweeton.3DTOM:Three-Di mension Geophysical Tomography[R].Bureau of Mines,1996.
[15]王辉,常旭.基于图形结构的三维射线追踪方法[J].地球物理学报,2000,43(4):534~541.
[16]张云姝,顾汉明,师学明.基于MOSER曲射线追踪的SIRT声波层析成像[J].工程地球物理学报,2005,2(3):167~176.
[2]赵连锋.井间地震波速与衰减联合层析成像方法研究[D].成都理工大学,2002.
[3]吴律.层析成像及其在井间地震中的应用[M].北京:石油工业出版社,1993.82~94.
[4]TJ Moser.Shortest path calculation of seismic rays[J].Geophysics,1991,56(1):59~67.
[5]武斌,严忠琼,曹俊兴.平方慢度解析射线追踪层析成像[J].工程地球物理学报,2005,2(2):109~113.
[6]John E Vidale.Finite-difference calculation of travel ti me in three di mensions[J].Geophysics,1990,55(5):521~526.
[7]Qin F,Olsen K B,Cai W,et al.Finite-difference so-lution of eikonal equation along expanding wavefronts[J].Geophysics,1992,57(3):478~487.
[8]赵改善,郝守玲,杨尔皓,等.基于旅行时线性插值的地震射线追踪算法[J].石油物探,1998,37(2):14~24.
[9]张霖斌,刘迎曦,赵振峰,等.有限差分法射线追踪[J].石油地球物理勘探,1993,28(6):673~677.
[10]Robert L Coultrip.High accuracy wavefront tracing travelti me calculation[J].Geophysics,1993,58(2):284~292.
[11]刘洪,李幼铭.计算最小走时和射线路径的界面网全局方法[J].地球物理学报,1995,38(6):823~831.
[12]HarmJ A Van Avendonk,Alistair J Harding,John A Orcutt,et al.Hybrid shortest path and ray ben-ding method for travel and raypath calculations[J].Geophysics,2001,66(2):648~653.
[13]雷栋,胡祥云.地震层析成像方法综述[J].地震研究,2006,29(4):418~426.
[14]Michael J Jackson,Dary R Tweeton.3DTOM:Three-Di mension Geophysical Tomography[R].Bureau of Mines,1996.
[15]王辉,常旭.基于图形结构的三维射线追踪方法[J].地球物理学报,2000,43(4):534~541.
[16]张云姝,顾汉明,师学明.基于MOSER曲射线追踪的SIRT声波层析成像[J].工程地球物理学报,2005,2(3):167~176.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心