海水分层对水平电偶极子产生电场的影响分析

根据实测海水电导率数据将海水分层,浅海环境模型可等效为空气-3层海水-海床模型。本文基于水平电偶极子电场数学模型,对水平电偶极子在海水分层情况下电场进行仿真计算,并与均匀海水模型中电场进行对比分析。从结果可知,海水分层时电场幅值大于海水均匀时电场幅值,曲线形态一致,电场x分量最大值位置未变,电场z分量最大值位置稍微外移;随着偶极子源深度越深,海水分层对电场幅值影响越大,在海水深度51.2 m,源深度40 m情况下,海水均匀和分层2种模型下电场x分量计算偏差达到13.0%。

The Analysis of the influence on the electric field of horizontal electric dipole from stratified seawater

The seawater is layered according to the measured seawater conductivity data.The shallow sea model is equivalent to air-three layers of the seawater-seabed model.This paper presents the simulating calculation of the HED in layered seawater on the basis of the HED mathematical modelling.And the result is contrasted with the electric field in homogeneous seawater.As the results show,the amplitude of electric field in stratified seawater is greater than that in homogeneous seawater,and curve patterns are both concordant.The maximum position ofx-component of electric field is unchanged,while the excursion of z-component of electric field has occurred.As the depth of dipole source become larger,the influence on electric field from Stratified Seawater is greater.When the depth of seawater is 51.2 m and the depth of source is 40 m,the calculation of deviation ofthe x-component between the two models is 13.0%.