Abstract：In view of the fact that three-dimensional curved surface continuation is of significance to accurate processing and interpretation of magnetic data, but remains difficult to achieve, I propose curved surface continuation technique using finite element moment method. I use isoparametric finite element dissection and least square moment method to perform discretization of continuation equation into real full inconsistent equation system, which is then solved by using conjugate gradient method. This technique can be directly used in upward and downward continuations of potential field data in an irregular observation grid on an undulating surface, with potentiol field data reduced to a horizontal plane in downward continuation. The technique brings higher accuracy, clearer resolution and better fidelity than others do. The program can be conveniently applicable for data processings in various complex conditions and works on various computers regardless of their sizes. The processings of model data and real data prove this technique effective and practical.
李家康. 有限元矩量法三维位场曲面延拓[J]. 石油地球物理勘探, 1992, 27(4): 482-492.
Li Jiakang. Curved surface continuation of three-dimensional potential field data by using finite element moment method. OGP, 1992, 27(4): 482-492.
