基于双曲线密度模型的频率域界面反演

密度界面反演是位场数据处理解释的重要方法之一。为了适应地层岩石密度随深度变化的特点，提高密度界面的反演精度，文中以双曲线密度界面模型为基础，从理论上推导了该密度模型的界面频率域正、反演公式，给出了反演方法的迭代计算过程。模型试验表明本文方法更适用于变密度地层界面的反演，其精度明显高于常密度界面的Parker-Oldenburg（简称PO）法。虎林盆地基底深度反演结果得到了大地电磁测深资料反演的佐证，且多处凸起和凹陷特征与前人研究成果可相互验证，进一步证明了本文方法的合理性和实用性。

Interface inversion in the frequency domain based on the hyperbolic density model

The density interface inversion is one of the most important methods for processing and analyzing potential field data.In order to adapt to strata density change with the depth and enhance the density interface inversion,we propose in this paper an interface inversion in the frequency domain based on the hyperbolic density interface model.The formulas of the interface forward modeling and inversion in the frequency domain are derived under the density model,and the iterative calculation process of the inversion is listed.The model test shows that the proposed method is more sui-table for the interface inversion of variable-density strata and its accuracy is higher than that of the Parker-Oldenburg method which is suitable for constant density interface.In the real data processing in Hulin Basin,the effectiveness and practicality of the proposed method are proved by the evidences of MT sounding and previous studies.