| 张弘宇,温建亮,张富明.有限差分法二维地电构造模型大地电磁法正演模拟[J].矿产勘查,2019,(8):1988-1992 |
| 有限差分法二维地电构造模型大地电磁法正演模拟 |
| Finite difference method two-dimensional geoelectric structure model forward modeling of magnetotelluric method |
| 投稿时间：2019-03-26 |
| DOI： |
| 中文关键词: 有限差分法 二维正演 构造 模型 |
| 英文关键词: finite difference method, two-dimensional forward modeling, construction, model |
| 基金项目:山西省财政补助科研项目(编号:2019-07)资助。 |
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| 中文摘要: |
| 为有效地对二维地电模型进行有限差分正演计算,利用均匀网格差分法对大地电磁地电模型进行数值模拟。从磁场分量导出边值问题公式,利用差分法推导出二维大地电磁法矩阵,正演结果能有效准确地验证均匀网格差分正演算法,分析得出了最佳的网格间距,该异常响应的横向位置与实际模型一致,可较好地反映出围岩和异常体的数值。同时,阻抗相位拟断面图能更好的反映出异常体的分布位置,且能识别异常体为高导体。 |
| 英文摘要: |
| In order to effectively perform the finite difference forward calculation on the two-dimensional geoelectric model, the numerical simulation of the magnetotelluric geoelectric model is carried out by the uniform grid difference method. The boundary value problem formula is derived from the magnetic field component, and the two-dimensional magnetotelluric method matrix is derived by the difference method. The forward model can effectively and accurately verify the uniform grid differential forward algorithm, and the optimal grid spacing is obtained. The lateral position of the response is consistent with the actual model, which better reflects the values of surrounding rock and anomalous body. At the same time, the impedance phase pseudo-section can better reflect the distribution position of the anomalous body, and can identify the abnormal body as a high conductor. |
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