可控源音频大地电磁法三维张量阻抗响应特征研究

发布时间：2018-05-09 13:24

本文选题：CSAMT + 三维数值模拟　；参考：《地球物理学进展》2017年02期

【摘要】：可控源音频大地电磁法(CSAMT)目前实际应用多以单个源采集标量数据为主,这种工作方式限制了CSAMT探测复杂地质构造的能力.随着CSAMT张量观测系统的推出和精细电法勘探的需求增多,CSAMT张量采集逐步受到重视.为了深化对CSAMT三维张量阻抗响应特征的认识,本文基于电场含源控制方程,采用交错网格有限差分法实现了CSAMT的三维正演算法;与二维CSAMT正演结果对比,验证了三维正演的正确性;设计了代表性三维地电模型,计算了标量和张量阻抗,对比和分析了标量和张量阻抗的响应特征.
[Abstract]:The practical application of controllable source audio magnetotelluric method (CSAMT) is mainly to collect scalar data from a single source, which limits the ability of CSAMT to detect complex geological structures. With the introduction of CSAMT Zhang Liang observation system and the increasing demand for fine electrical exploration, the collection of CSAMT Zhang Liang has been paid more and more attention. In order to deepen the understanding of the impedance response characteristics of CSAMT 3D Zhang Liang, based on the electric field source control equation, this paper uses the staggered grid finite difference method to realize the 3D forward algorithm of CSAMT, which is compared with the 2-D CSAMT forward modeling results. The correctness of the 3D forward modeling is verified, and the representative 3D geoelectric model is designed, the scalar impedance and Zhang Liang impedance are calculated, and the response characteristics of scalar and Zhang Liang impedance are compared and analyzed.
【作者单位】：中国地质大学(北京)地球物理与信息技术学院;中国地质大学地下信息探测技术与仪器教育部重点实验室;武警黄金第七支队;
【基金】：国家自然科学基金项目(41374078) 国土资源部地质调查项目(12120113086100和12120113101300)联合资助
【分类号】：P631.325

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