基于近似零范数稀疏恢复的迭代解法的三维重力反演

作者：孟兆海,徐学纯,黄大年

摘要：This research proposes a novel three-dimensional gravity inversion based on sparse recovery in compress sensing.Zero norm is selected as the objective function,which is then iteratively solved by the approximate zero norm solution.The inversion approach mainly employs forward modeling;a depth weight function is introduced into the objective function of the zero norms.Sparse inversion results are obtained by the corresponding optimal mathematical method.To achieve the practical geophysical and geological significance of the results,penalty function is applied to constrain the density values.Results obtained by proposed provide clear boundary depth and density contrast distribution information.The method's accuracy,validity,and reliability are verified by comparing its results with those of synthetic models.To further explain its reliability,a practical gravity data is obtained for a region in Texas,USA is applied.Inversion results for this region are compared with those of previous studies,including a research of logging data in the same area.The depth of salt dome obtained by the inversion method is 4.2 km,which is in good agreement with the 4.4 km value from the logging data.From this,the practicality of the inversion method is also validated.

发文机构：Tianjin Navigation Instrument Research Institute College of Earth Sciences College of Instrumentation and Electrical Engineering Key Laboratory of Petroleum Resources Research

关键词：Three-dimensionalgravityinversionSPARSErecoveryAPPROXIMATEzeroNORMITERATIVEmethoddensityconstraintPENALTYfunction

分类号： O[理学]