海洋可控源电磁法正反演及应用研究进展

Abstract

海洋可控源电磁法（MCSEM）是海底资源勘探中的一种重要方法. 该方法克服了天然场源电磁法信号弱、高频信息不足的缺点，并具有探测范围广、效率高、成本较低等优势，因此在海底资源和能源勘探中展现出巨大的潜力. 本文首先简要回顾了海洋可控源电磁法的工作原理及技术发展，然后聚焦于三维正反演数值模拟的最新研究动态，详细梳理了海洋可控源电磁法的正反演方法，其中地质引导或者地震结果引导的海洋电磁反演或者联合反演，可以降低反演多解性，比反演单一观测数据在地质解释上更有优势. 并介绍了其在海底石油、天然气水合物、多金属矿勘探等领域的应用实例. 针对当前研究现状，本文提出了海洋可控源电磁法未来发展的关键方向：提高算法的计算精度和效率，深入研究三维各向异性正反演模型，以及提升数据处理技术. 这些战略性的建议旨在推动海洋电磁法技术的持续进步，为海底资源的精准勘探提供理论支撑和实践指导.

Alternate abstract:

Marine controlled-source electromagnetic method (MCSEM) is an important technique in seabed resource exploration. This method overcomes the shortcomings of natural field electromagnetic methods, such as weak signals and insufficient high-frequency information, and offers advantages such as wide detection range, high efficiency, and low cost. Therefore, it shows great potential in seabed resource and energy exploration. This paper first provides a brief review of the working principle and technological development of the MCSEM method, then focuses on the latest research trends in three-dimensional forward and inversion numerical simulation, elaborates on the forward and inversion methods of MCSEM, among them, geologically-guided or seismically-results-guided marine electromagnetic inversion or joint inversion can reduce the inversion multiplicity and be more advantageous than a single inversion observation data in geological interpretation. and presents application examples of the method in seabed oil, natural gas hydrates, and polymetallic mineral exploration. Based on the current state of research, this paper proposes key directions for the future development of MCSEM: improving the computational precision and efficiency of algorithms, conducting in-depth studies on three-dimensional anisotropic forward and inverse models, and enhancing data processing techniques. These strategic suggestions aim to promote the continuous advancement of marine electromagnetic technology and provide theoretical support and practical guidance for precise seabed resource exploration.