CAJ | 학술논문

介绍一种海洋可控源电磁场一维反演方法，海洋可控源电磁一维正演是通过汉克尔变换求得的。采用正则化高斯?牛顿法对海洋可控源电场分量和磁场分量进行反演。在一维典型海底高阻模型上进行反演方法的正确性和有效性验证。结果表明：高斯?牛顿反演方法在反演初期收敛很快，数据拟合误差在10次反演迭代内即可下降到2.0左右，在反演后期收敛放缓并出现震荡收敛现象；但在20多次迭代收敛，反演结果能较好指示高阻薄层的位置，与理论模型吻合较好。
개소일충해양가공원전자장일유반연방법，해양가공원전자일유정연시통과한극이변환구득적。채용정칙화고사?우돈법대해양가공원전장분량화자장분량진행반연。재일유전형해저고조모형상진행반연방법적정학성화유효성험증。결과표명：고사?우돈반연방법재반연초기수렴흔쾌，수거의합오차재10차반연질대내즉가하강도2.0좌우，재반연후기수렴방완병출현진탕수렴현상；단재20다차질대수렴，반연결과능교호지시고조박층적위치，여이론모형문합교호。
An one-dimensional inversion algorithm for marine controlled-source electromagnetic (CSEM) data was presented. The Hankel transform was used to implement marine CSEM one-dimensional (1D) forward modeling. The regularized Gauss-Newton (GN) method was applied to invert both the electric and magnetic field data. A 1D canonical model with a high resistivity thin reservoir layer was used to test our inversion algorithm. The inversion results of synthetic data show that the Gauss-Newton method converges fast at the first iterative stage, and the misfit reduces by about 2.0 with less than 10 iterations of inversion. After a few iterations, the convergence slows down and the data misfit decays oscillate at the final stage of inversion. However, the inversion converges after more than 20 iterations. The inversion results are close to those of the real models well.