瞬变电磁数据一维反演的初值选取研究

 在进行瞬变电磁数据一维反演时，如何合理选取初值对反演结果影响较大。文中利用视纵向电导能够划分电性层位的优势，根据视深度—视纵向电导曲线特征，结合视深度—似电阻率和视深度—全区电阻率曲线，相互对比，确定曲线拐点；根据拐点个数给出层数，再利用拐点对应的坐标值选取层参数。以此作为一维线性反演的初始模型进行反演。试算结果表明，当初值选取合理时，利用常规的线性反演方案就可使反演曲线获得快速、稳定收敛和等值性减小的效果。

Studies on initial parameter selection of one-dimensional inversion for Transient Electromagnetic Data

When conducting transient electromagnetic one-dimensional inversion, how to select initial value has a great impact on inversion result. In this paper the advantage of apparent vertical conductance classifying electrical property layer was utilized, then based on characteristics of apparent depth-apparent vertical conductance curve and by integrating apparent depth-apparent resistivity with apparent depth-smoking-ring resistivity curve, the curves were correlated and analyzed and the turning points of the c...