频率域电磁法数值模拟进展

Progress in Numerical Simulation of Frequency-domain Electromagnetic Method

频率域电磁法在矿产普查、地球深部结构探查、地质调查、环境和工程勘查等领域都有着广泛的应用。频率域电磁法的数值模拟对提高电磁法的数据解释技术、电磁勘探设计水平,以及研究复杂地质条件下的电磁响应特征具有重要意义。近年来计算技术的进步、数据采集系统的提高和高性能计算机的迅速发展,大大促进了频率域电磁法数值模拟技术的发展,尤其是出现了多种高效的数值算法和并行求解技术,有效提高了频率域电磁场的三维数值模拟的速度和精度,对三维复杂地形地质结构的处理能力也显著提高,使得复杂条件下三维频率域电磁数据的快速反演成为可能。主要介绍了频率域电磁法数值模拟技术、进展,以及相关的线性方程组求解算法的应用,并对各种方法的特点作了分析比较,对未来的发展方向给出展望。

Frequency-domain electromagnetic method is widely used in mineral survey,deep structure exploration of the earth,geological survey,environment and engineering exploration and so on.Numerical modeling of electromagnetic field in frequency-domain is significant to improve the data interpretation technology,the design level of electromagnetic exploration,and the understanding of electromagnetic responses collected in increasingly complex geologic settings.In recent years great progresses have been made in numerical modeling of electromagnetic field in frequency domain due to the rapid development in computing technologies,data acquisition systems and high-performance computers.Advances in efficient numerical algorithms and parallel solving technique in particular greatly improve the speed and accuracy of numerical simulation.And at the same time,the processing ability of 3D complex topographic geological structures was also significantly improved,which made it possible to rapidly inverse 3D complex substructures of the Earth from electromagnetic data collected in frequency-domain.The numerical simulation technology and progress of frequency domain electromagnetic method was focused on,as well as the application of related linear equations solving algorithm were introduced in the study.The characteristics of various methods were analyzed and compared,as well as the prospect of future development.