密度和速度随机分布共网格模型的重力与地震联合反演
|
摘要
针对重力与地震联合反演存在的问题,结合已有的研究成果,本文研究实现了速度和密度随机分布共网格单元模型的建模技术,以适应密度和速度剧烈变化的复杂模型及联合反演的计算要求.重力正演利用了该网格的二度半体模型,并进一步改进了地震走时的二维射线追踪计算方法,以适用于速度随机分布的网格介质.结合改进的模拟退火算法,实现了这种共网格条件下的重力与地震资料的同步联合反演.模型试验证明了重力与地震联合反演可以准确确定复杂物性界面的密度和速度结构,适用于物性界面不完全一致和物性变化剧烈的复杂模型,并且联合反演结果要优于单独的重力反演.带先验信息约束下的实际资料的联合反演,进一步证明了该方法的适用性和效果,可提高反演精度并减少多解性.
In view of the problems existing in joint inversion of gravity & seismic data and the published research results,we study a model construction method based on common gridded model with random density and velocity distributions to meet the needs of joint inversion and the complicated model with large density and velocity variations.2.5 dimensional gravity forward modeling is fulfilled in accordance with this gridded model.By improving the ray-tracing method in 2 dimensional seismic travel-time computing to suit the gridded media with random velocity distribution,we realize the synchronous joint inversion of gravity & seismic data based on this kind of common gridded model in accordance with the improved very fast simulated annealing algorithm.The model test shows that the joint inversion could accurately determine the density and velocity structures of complicated model with uncommon interface and large variations of density and velocity.Moreover,joint inversion method is clearly superior to the single inversion of gravity data.The joint inversion of the observed data with a priori constraining information also gives good effects,which make it clear that this method is effective and practicable in improving inversion accuracy and reducing ambiguity.
In view of the problems existing in joint inversion of gravity & seismic data and the published research results,we study a model construction method based on common gridded model with random density and velocity distributions to meet the needs of joint inversion and the complicated model with large density and velocity variations.2.5 dimensional gravity forward modeling is fulfilled in accordance with this gridded model.By improving the ray-tracing method in 2 dimensional seismic travel-time computing to suit the gridded media with random velocity distribution,we realize the synchronous joint inversion of gravity & seismic data based on this kind of common gridded model in accordance with the improved very fast simulated annealing algorithm.The model test shows that the joint inversion could accurately determine the density and velocity structures of complicated model with uncommon interface and large variations of density and velocity.Moreover,joint inversion method is clearly superior to the single inversion of gravity data.The joint inversion of the observed data with a priori constraining information also gives good effects,which make it clear that this method is effective and practicable in improving inversion accuracy and reducing ambiguity.
引文
[1]杨辉,戴世坤,宋海斌等.综合地球物理联合反演综述.地球物理学进展,2002,17(2):262～271Yang H,Dai S K,Song H B,et al.Overview of joint inversion of integrated geophysics.Progress in Geophysics(in Chinese),2002,17(2):262～271
[2]敬荣中,鲍光淑,陈绍裘.地球物理联合反演研究综述.地球物理学进展,2003,18(3):535～540Jing R Z,Bao G S,Chen S Q.Areviewof the researches for geophysical combinative inversion.Progress in Geophysics(in Chinese),2003,18(3):535～540
[3]于鹏,王家林,吴健生等.地球物理联合反演的研究现状和分析.勘探地球物理进展,2006,29(2):87～93Yu P,Wang J L,Wu J S,et al.Review and discussions on geophysical joint inversion.Progress in Exploration Geophysics(in Chinese),2006,29(2):87～93
[4]Aleseev A S.Quantitative description and its features of the solution of joint inversion problem.In:Thesis of SEG61st Annual.Beijing:PetroleumIndustry Press,1993.595～596
[5]于鹏,王家林,吴健生等.重力与地震资料的模拟退火约束联合反演.地球物理学报,2007,50(2):529～538Yu P,Wang J L,Wu J S,et al.Constrainedjoint iversion of gravity and seismic data using the simulated annealing algorithm.Chinese J.Geophys.(in Chinese),2007,50(2):529～538
[6]于鹏,王家林,吴健生.二度半长方体组合模型的重力模拟退火反演.地球物理学报,2007,50(3):222～229Yu P,Wang J L,Wu J S.Aninversion of gravity anomalies by using a2.5dimensional rectangle gridded model and the simulated annealing algorithm.Chinese J.Geophys.(in Chinese),2007,50(3):222～229
[7]杨辉,王家林,吴健生等.大地电磁与地震资料仿真退火约束联合反演.地球物理学报,2002,45(5):723～734Yang H,Wang J L,Wu J S,et al.Constrained joint inversion of magnetotelluric and seismic data using simulated annealing algorithm.Chinese J.Geophys.(in Chinese),2002,45(5):723～734
[8]徐果明,卫山,高尔根等.二维复杂介质的块状建模及射线追踪.石油地球物理勘探,2001,36(4):213～219Xu G M,Wei S,Gao E G,et al.Block model-building and ray-tra-tracing in2-D complicated medium.Oil Geophysical Prospecting(in Chinese),2001,36(4):213～219
[9]王家林,王一新,万明浩.石油重磁解释.北京:石油工业出版社,1991Wang J L,Wang Y X,Wan M H.PetroleumInterpretation by Gravity and Magnetic Data(in Chinese).Beijing:Petroleum Lndustry Press,1991
[10]高尔根,徐果明.二维速度随机分布逐步迭代射线追踪方法.地球物理学报,1996,39(增刊):302～308Gao E G,Xu G M.Anew kind of step by stepiterative ray-tracing method.Chinese J.Geophys.(in Chinese),1996,39(Suppl):302～308
[11]陈华根.基于GIS技术的大地电磁—重力模拟退火联合反演研究[博士论文].上海:同济大学地球物理系,2001Chen H G.GIS based joint inversion of magnetotelluric and gravity data using simulated annealing algorithm[Ph.D.thesis](in Chinese).Shanghai:Geophysics Depart ment of Tongji University,2001
[12]陈华根,吴健生,王家林.改进的重力模拟退火反演研究.吉林大学学报(地球科学版),2002,32(3):294～298Chen H G,Wu J S,Wang J L.Research in modified simulated annealing gravity inversion.Journal of Jilin University(Earth Science Edition)(in Chinese),2002,32(3):294～298
[13]陈东敬,于鹏.大地电磁与地震联合反演技术在西亚某区的综合应用.石油物探,2005,5,44(3):251～256Chen D J,Yu P.Integrated application in the area of west Asia using joint inversion technique of magnetotelluric and seismic data.Geophysical Prospecting for Petroleum(in Chinese),2005,5,44(3):251～256
[14]陈永杰,于鹏.大地电磁、地震与重力资料综合反演在徐闻某区的应用.勘探地球物理进展,2005,28(4):271～275Chen YJ,Yu P.Application of integrated joint inversion of magnetotelluric,seismic and gravity data in Xuwen area.Progress in Exploration Geophysics(in Chinese),2005,28(4):271～275
[15]于鹏,王家林,吴健生.大地电磁全频段偏移成像结合反演技术.同济大学学报,2005,33(4):540～544Yu P,Wang J L,Wu J S.Magnetotelluric soubding whole frequency bands migration imaging versus inversion technique.Journal of Tongji University(Natural Science)(in Chinese),2005,33(4):540～544
[2]敬荣中,鲍光淑,陈绍裘.地球物理联合反演研究综述.地球物理学进展,2003,18(3):535～540Jing R Z,Bao G S,Chen S Q.Areviewof the researches for geophysical combinative inversion.Progress in Geophysics(in Chinese),2003,18(3):535～540
[3]于鹏,王家林,吴健生等.地球物理联合反演的研究现状和分析.勘探地球物理进展,2006,29(2):87～93Yu P,Wang J L,Wu J S,et al.Review and discussions on geophysical joint inversion.Progress in Exploration Geophysics(in Chinese),2006,29(2):87～93
[4]Aleseev A S.Quantitative description and its features of the solution of joint inversion problem.In:Thesis of SEG61st Annual.Beijing:PetroleumIndustry Press,1993.595～596
[5]于鹏,王家林,吴健生等.重力与地震资料的模拟退火约束联合反演.地球物理学报,2007,50(2):529～538Yu P,Wang J L,Wu J S,et al.Constrainedjoint iversion of gravity and seismic data using the simulated annealing algorithm.Chinese J.Geophys.(in Chinese),2007,50(2):529～538
[6]于鹏,王家林,吴健生.二度半长方体组合模型的重力模拟退火反演.地球物理学报,2007,50(3):222～229Yu P,Wang J L,Wu J S.Aninversion of gravity anomalies by using a2.5dimensional rectangle gridded model and the simulated annealing algorithm.Chinese J.Geophys.(in Chinese),2007,50(3):222～229
[7]杨辉,王家林,吴健生等.大地电磁与地震资料仿真退火约束联合反演.地球物理学报,2002,45(5):723～734Yang H,Wang J L,Wu J S,et al.Constrained joint inversion of magnetotelluric and seismic data using simulated annealing algorithm.Chinese J.Geophys.(in Chinese),2002,45(5):723～734
[8]徐果明,卫山,高尔根等.二维复杂介质的块状建模及射线追踪.石油地球物理勘探,2001,36(4):213～219Xu G M,Wei S,Gao E G,et al.Block model-building and ray-tra-tracing in2-D complicated medium.Oil Geophysical Prospecting(in Chinese),2001,36(4):213～219
[9]王家林,王一新,万明浩.石油重磁解释.北京:石油工业出版社,1991Wang J L,Wang Y X,Wan M H.PetroleumInterpretation by Gravity and Magnetic Data(in Chinese).Beijing:Petroleum Lndustry Press,1991
[10]高尔根,徐果明.二维速度随机分布逐步迭代射线追踪方法.地球物理学报,1996,39(增刊):302～308Gao E G,Xu G M.Anew kind of step by stepiterative ray-tracing method.Chinese J.Geophys.(in Chinese),1996,39(Suppl):302～308
[11]陈华根.基于GIS技术的大地电磁—重力模拟退火联合反演研究[博士论文].上海:同济大学地球物理系,2001Chen H G.GIS based joint inversion of magnetotelluric and gravity data using simulated annealing algorithm[Ph.D.thesis](in Chinese).Shanghai:Geophysics Depart ment of Tongji University,2001
[12]陈华根,吴健生,王家林.改进的重力模拟退火反演研究.吉林大学学报(地球科学版),2002,32(3):294～298Chen H G,Wu J S,Wang J L.Research in modified simulated annealing gravity inversion.Journal of Jilin University(Earth Science Edition)(in Chinese),2002,32(3):294～298
[13]陈东敬,于鹏.大地电磁与地震联合反演技术在西亚某区的综合应用.石油物探,2005,5,44(3):251～256Chen D J,Yu P.Integrated application in the area of west Asia using joint inversion technique of magnetotelluric and seismic data.Geophysical Prospecting for Petroleum(in Chinese),2005,5,44(3):251～256
[14]陈永杰,于鹏.大地电磁、地震与重力资料综合反演在徐闻某区的应用.勘探地球物理进展,2005,28(4):271～275Chen YJ,Yu P.Application of integrated joint inversion of magnetotelluric,seismic and gravity data in Xuwen area.Progress in Exploration Geophysics(in Chinese),2005,28(4):271～275
[15]于鹏,王家林,吴健生.大地电磁全频段偏移成像结合反演技术.同济大学学报,2005,33(4):540～544Yu P,Wang J L,Wu J S.Magnetotelluric soubding whole frequency bands migration imaging versus inversion technique.Journal of Tongji University(Natural Science)(in Chinese),2005,33(4):540～544
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