地震-重力联合反演及效果——以天津—北京—赤城地震探测剖面为例
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摘要
充分运用地震与重力场不同方法的优点,以天津—北京—赤城高精度、高分辨率人工地震探测剖面(DSS)为例,采用地震解释模型结果为约束,通过正反演拟合,获得剖面上密度结构,再对剖面两侧地震解释的模型结果重新进行拟合修正.实践表明,用重力-地震相互约束开展联合反演,可以克服单一方法存在的缺陷和不足,使获得的结果更接近研究区的实际情况.
This paper makes full use of the merits of different methods in analyzing seismic and gravity fields.Taking the Tianjin——Beijing——Chicheng high-precision and high-resolution deep seismic sounding profile(DSS) as an example and using the model of seismic interpretation as a constraint,the paper conducted forward and inverse data fitting and obtained the density structure of the profile.Then re-fitted and amended the model result of the seismic interpretation of both sides of the profile.Practice has shown that,with joint inversion of seismic and gravity data,the shortcomings and deficiencies of a single method are overcomed,so that the obtained results are closer to the actual situation of the studied area.
This paper makes full use of the merits of different methods in analyzing seismic and gravity fields.Taking the Tianjin——Beijing——Chicheng high-precision and high-resolution deep seismic sounding profile(DSS) as an example and using the model of seismic interpretation as a constraint,the paper conducted forward and inverse data fitting and obtained the density structure of the profile.Then re-fitted and amended the model result of the seismic interpretation of both sides of the profile.Practice has shown that,with joint inversion of seismic and gravity data,the shortcomings and deficiencies of a single method are overcomed,so that the obtained results are closer to the actual situation of the studied area.
引文
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嘉世旭,张成科,赵金仁,方盛明,刘志,赵俊猛.2009.华北东北部裂陷盆地与燕山隆起地壳结构[J].地球物理学报,52(1):99--110.
敬荣中,鲍光淑,陈绍裘.2003.地球物理联合反演综述[J].地球物理学进展,18(3):535--540.
李雄.1992.地震-重力联合反演:不同的实现方式[J].天然气地球科学,3(5):37--42.
Barton PJ.1986.The relationship between seismic velocity and densityinthe continental crust:Auseful constrain-[J].Geophys J R Astr Soc,87(1):195--208.
Pedersen L B.1977.Interpretation of potential field data,a generalized inverse approach[J].Geophys Prosp,25(5):199--230.
Ramussen R.1979.End correctionin potential field modeling[J].Geophys Prosp,27(4):749--760.
冯锐,严惠芬,张若水.1986.三维位场的快速反演方法及程序设计[J].地质学报,60(4):390--403.
嘉世旭,刘昌铨.1988.动力学射线追踪方法及其在二维非均匀介质理论地震图计算中的应用[M].北京:地质出版社:277--286.
嘉世旭,张成科,赵金仁,方盛明,刘志,赵俊猛.2009.华北东北部裂陷盆地与燕山隆起地壳结构[J].地球物理学报,52(1):99--110.
敬荣中,鲍光淑,陈绍裘.2003.地球物理联合反演综述[J].地球物理学进展,18(3):535--540.
李雄.1992.地震-重力联合反演:不同的实现方式[J].天然气地球科学,3(5):37--42.
Barton PJ.1986.The relationship between seismic velocity and densityinthe continental crust:Auseful constrain-[J].Geophys J R Astr Soc,87(1):195--208.
Pedersen L B.1977.Interpretation of potential field data,a generalized inverse approach[J].Geophys Prosp,25(5):199--230.
Ramussen R.1979.End correctionin potential field modeling[J].Geophys Prosp,27(4):749--760.
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