【摘要】 一维反演是当前瞬变电磁数据反演的主要方法之一,但一维反演存在剖面连续性差的问题,因而将横向约束引入三维测网瞬变电磁数据的一维反演。考虑到一般情况下实际测点分布并不严格规则,构建了距离加权相邻点横向约束的拟三维反演方法,利用高斯—牛顿法求解,并采用反射系数递推的方法快速求取雅可比矩阵。该方法能对非规则测网数据加入横向约束,提高模型相邻测点的连续性。模型正演数据和实际数据的测试结果验证了该方法的有效性和实用性。更多还原

【Abstract】 One-dimensional inversion is one of the main methods for processing of TEM data,but usually there is poor continuity on one-dimensional inversion profile.The principle of lateral constraint is introduced to construct quasi-3D transient electromagnetic method(TEM)inversion.Considering that the actual 3 D measuring grid is often not strictly regular,the quasi-3D TEM data inversion is constructed with the distance-weighted adjacent stations lateral constraint,and the Gauss-Newton method is used to solve the inversion equation,which can not only effectively suppressed the irrational model mutation generated by single station 1D inversion,also has no the requirement on the regularity of the 3D measuring grid.The tests of the synthetic data and field data verified the effectiveness of this method.更多还原