论文部分内容阅读
为了将瞬变电磁水平分量转化成电阻率参数,实现瞬变电磁水平分量视电阻率定义,对不同偏移距下大定源回线瞬变电磁场水平分量响应进行了数值计算和分析,得出水平分量具有与中心点垂直分量相似的函数形态和函数性质,据此,水平分量可以用与中心点垂直分量类似的多项式进行拟合,从而得到多项式形式的感应电动势表达式。根据瞬变电磁晚期近似条件,用水平分量的拟合多项式,定义相应的晚期视电阻率表达式,从而实现水平分量响应到地下介质电阻率参数的转化。通过对模型的计算可知,上述方法可行,结果正确;通过对实测数据的解释可知,水平分量不仅具有纵向分辨力,也具有较好的横向分辨率。
In order to transform the transient electromagnetic horizontal component into resistivity parameter and realize the definition of apparent resistivity of transient electromagnetic horizontal component, numerical calculation and analysis of the horizontal component response of large fixed loop transient electromagnetic field under different offset are carried out. The horizontal component has similar morphological and functional properties as the vertical component of the central point, whereby the horizontal component can be fitted with a polynomial similar to the vertical component of the central point, resulting in a polynomial form of EMF expression. According to the late electromagnetic transient approximation condition, the corresponding late apparent apparent resistivity expression is defined by the fitting polynomial of the horizontal component so that the transformation of the horizontal component response to the resistivity parameter of the underground medium can be realized. Through the calculation of the model, the above method is feasible and the result is correct. Through the interpretation of the measured data, the horizontal component not only has the vertical resolution but also has better horizontal resolution.