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复杂介质可控源电磁勘探数值模拟及反演算法的研究一直是国内外地球物理学者研究的热点。本文对复杂介质可控源电磁勘探快速正反演算法研究进行综述,重点对复杂介质快速正反演算法及应用进行分析,指出高效并行、特殊边界条件或将是其真正实用化的关键,当前仍然是极具挑战的研究方向。着重对未受关注的可控源电磁法复杂介质积分方程法正反演算法及其应用研究,如二维、2.5维快速正反演算法;地面、井筒电磁勘探实例、起伏地形异常场模拟等进行讨论。指出国内积分方程法的研究相对滞后,但应用前景较可观;特别是大尺度隐伏资源勘探领域,高精度、高效电磁勘探正反演需求较迫切。通过体积分方程法快速正反演算例分析,表明该方法可适用于大尺度勘探生产,具有较好实用性。复杂地形模拟,高效正反演算法等是积分方程法实用化的关键。
The research of numerical simulation and inversion algorithm of controllable source electromagnetic prospecting of complex medium has been a hot research topic of geophysicists both at home and abroad. This paper reviews the research of fast forward inversion algorithms for controllable source electromagnetic surveys of complex media. The emphasis is put on the analysis of algorithms and applications of rapid inversion of complex media. It is pointed out that efficient parallel and special boundary conditions may be the key to their practical application. Remains a challenging research direction. Focusing on the undeclared source electromagnetic complex electrokinetic method of complex integral equation method and its application research, such as two-dimensional, 2.5-dimensional fast forward and inverse algorithm; surface, borehole electromagnetic prospecting, anomalous terrain undulation simulation have a discussion. It is pointed out that the research of integral equation method in China is lagging behind, but the application prospect is quite promising. Especially in large-scale hidden resource exploration, the demand of forward and inversion of electromagnetic exploration with high accuracy and efficiency is more urgent. By the method of volume integral equation, a fast forward and inverse numerical example is given, which shows that the method can be applied to large-scale exploration and production with good practicability. Complicated terrain simulation, efficient forward and inverse algorithm is the key to the practical application of integral equation method.