改进的大地电磁与地震资料联合反演方法在黔中隆起区的适用性研究
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摘要
为了解决复杂地质问题以及大地电磁(MT)与地震资料联合反演存在的问题,结合已有研究成果,利用基于不同物性参数随机分布共网格模型的大地电磁与地震资料同步联合反演技术,对黔中隆起地震资料品质低,且构造复杂的典型地段的实际资料进行了联合反演。根据研究区实际情况,利用两种地质解释方案建立了联合反演的初始速度模型和电性模型,并进行了联合反演和综合解释。将反演结果与已有方法得到的结果进行对比表明,改进的联合反演方法适用于物性剧烈变化的复杂地质模型条件,在先验信息的约束下,改进后的联合反演方法在确定复杂物性条件下的电性和速度结构方面能够提供更合理的解释方案和物性参数,为目前研究区难以推断的古生界目的层的分布及基本构造特征的判断提供了参考依据和技术手段。
In order to solve the problems existing in joint inversion of magnetotelluric(MT) and seismic data,combining with some research achievements,a synchronous joint inversion of MT and seismic data based on common gridded model with random physical property distributions was proposed and applied to inverse the actual data in the area with complex structures of middle Guizhou uplift. In terms of the conditions of the area,two geologic interpretation schemes were used to establish initial velocity model and resistivity model,carry put joint inversion and integrated interpretatioa The obtained results were compared with the results from existing method,which showed that the improved joint method is suitable to the complex geologic model with strong variable physical properties. Meanwhile,with the restraint of prior information,the improved joint inversion method can provide more reasonable interpretation scheme and physical parameters to identify electric properties and velocity structure with complex physical properties, which provides basis and supports for the determination of Paleozoic target and basic structural features in the research area hard to be identified.
In order to solve the problems existing in joint inversion of magnetotelluric(MT) and seismic data,combining with some research achievements,a synchronous joint inversion of MT and seismic data based on common gridded model with random physical property distributions was proposed and applied to inverse the actual data in the area with complex structures of middle Guizhou uplift. In terms of the conditions of the area,two geologic interpretation schemes were used to establish initial velocity model and resistivity model,carry put joint inversion and integrated interpretatioa The obtained results were compared with the results from existing method,which showed that the improved joint method is suitable to the complex geologic model with strong variable physical properties. Meanwhile,with the restraint of prior information,the improved joint inversion method can provide more reasonable interpretation scheme and physical parameters to identify electric properties and velocity structure with complex physical properties, which provides basis and supports for the determination of Paleozoic target and basic structural features in the research area hard to be identified.
引文
[1]王家林,吴健生,于鹏,等.2004年度黔中隆起及其周缘MT资料处理与解释成果报告[R].上海:同济大学海洋与地球科学学院地球物理系,2005
[2]于鹏,张罗磊,王家林,等.重磁电震资料联合反演黔中隆起物性结构[J].同济大学学报,2008,36(4): 406-412
[3]杨辉,戴世坤,宋海斌,等.综合地球物理联合反演综述[J].地球物理学进展,2002,17(2):262-271
[4]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[J].勘探地球物理进展,2006,29(2): 87-93
[5]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[J].地球物理学报,2002,45(5): 723-734
[6]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[J].石油物探,2005,44(3): 251-256
[7]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[J].勘探地球物理进展,2005,28 (4):271-275
[8]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[J].地球物理学报,2007,50(2): 529-538
[9]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[J].石油地球物理勘探,2001,36(4): 213-219
[10]于鹏,王家林,吴健生.MT、地震与重磁资料联合反演黔中隆起物性和地质结构[C]//第七届中国国际地球电磁学术讨论会论文集,成都,2005:298-301
[11]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[J].地球物理学报,2007,50(3): 222-229
[12]于鹏,戴明刚,王家林,等.密度和速度随机分布共网格模型的重力与地震联合反演[J].地球物理学报, 2008,51(3):845-852
[13]陈华根,吴健生,王家林.改进的重力模拟退火反演研究[J].吉林大学学报(地球科学版),2002,32(3): 294-298
[14]于鹏,戴明刚,王家林,等.电阻率和速度随机分布的MT与地震联合反演[J].地球物理学报,2009,52 (4):1089-1097
[15]高尔根,徐果明.二维速度随机分布逐步迭代射线追踪方法[J].地球物理学报,1996,39(S1):302-308
[16]万桂梅,汤良杰,郭彤楼,等.黔中隆起及邻区分带性变形特征[J].地质学报,2008,82(3):316-320
[17]于鹏,王家林,吴健生.有限差分法大地电磁多参数偏移成像[J].地球物理学报,2001,44(4):552-562
[18]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[J].同济大学学报,2005,33(4):540-544
[2]于鹏,张罗磊,王家林,等.重磁电震资料联合反演黔中隆起物性结构[J].同济大学学报,2008,36(4): 406-412
[3]杨辉,戴世坤,宋海斌,等.综合地球物理联合反演综述[J].地球物理学进展,2002,17(2):262-271
[4]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[J].勘探地球物理进展,2006,29(2): 87-93
[5]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[J].地球物理学报,2002,45(5): 723-734
[6]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[J].石油物探,2005,44(3): 251-256
[7]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[J].勘探地球物理进展,2005,28 (4):271-275
[8]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[J].地球物理学报,2007,50(2): 529-538
[9]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[J].石油地球物理勘探,2001,36(4): 213-219
[10]于鹏,王家林,吴健生.MT、地震与重磁资料联合反演黔中隆起物性和地质结构[C]//第七届中国国际地球电磁学术讨论会论文集,成都,2005:298-301
[11]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[J].地球物理学报,2007,50(3): 222-229
[12]于鹏,戴明刚,王家林,等.密度和速度随机分布共网格模型的重力与地震联合反演[J].地球物理学报, 2008,51(3):845-852
[13]陈华根,吴健生,王家林.改进的重力模拟退火反演研究[J].吉林大学学报(地球科学版),2002,32(3): 294-298
[14]于鹏,戴明刚,王家林,等.电阻率和速度随机分布的MT与地震联合反演[J].地球物理学报,2009,52 (4):1089-1097
[15]高尔根,徐果明.二维速度随机分布逐步迭代射线追踪方法[J].地球物理学报,1996,39(S1):302-308
[16]万桂梅,汤良杰,郭彤楼,等.黔中隆起及邻区分带性变形特征[J].地质学报,2008,82(3):316-320
[17]于鹏,王家林,吴健生.有限差分法大地电磁多参数偏移成像[J].地球物理学报,2001,44(4):552-562
[18]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[J].同济大学学报,2005,33(4):540-544
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