摘要
采用有限差分方法,对水平电偶极子源在海洋二维介质情况下电磁响应进行数值模拟。利用油气高阻异常体模型的数值模拟结果,研究MVO(Magnitude Versus Offset)曲线解释方法的有效性,进而分析高阻油气异常体的水平位置的变化,对电场和磁场幅值的MVO曲线产生的影响,得出了通过MVO曲线定性分析高阻油气异常体相对水平位置的方法。本研究可为海洋可控源电磁法数据的定性分析提供部份理论依据。
Finite difference method is applied to simulate the electromagnetic response to horizontal electric dipole source in 2-dimensional marine geologic structure.By utilizing simulation results of high-resistance hydrocarbon anomalies model,effectiveness of magnitude versus offset(MVO) curve explanation method is confirmed,and influ- ence on MVO curve of electric field amplitude and magnetic field amplitude by changing horizontal position of high-resistance hydrocarbon anomalies is analyzed,the method of qualitative analysis of relative horizontal position of high-resistance hydrocarbon anomalies is obtained.Accordingly, this article can provide a theoretical basis for qualitative analysis of marine controlled-source electromagnetic data.
出处
《物探化探计算技术》
CAS
CSCD
2012年第2期162-166,7,共5页
Computing Techniques For Geophysical and Geochemical Exploration
基金
国家科技重大专项(2011ZX05025-001-08)
关键词
海洋可控源电磁探测
MVO曲线
电偶极子源
空气波
marine controlled-source electromagnetic survey(MCSEM)
magnitude versus offset(MVO) curve
horizontal electric dipole source(HED)
airwaves
