摘要
对瞬变电磁 (TEM)资料进行反演时 ,采用观测磁场而不用视电阻率 ,避免了由于TEM视电阻率定义而引起的误差 ,并且由源象磁场和观测磁场之间的拟合进行反演使反演结果受非均匀性影响较小 ;将反演结果构置出地电模型 ,计算出它的MT曲线作为静位移校正的参考曲线 ,使它用于MT静位移校正更为可靠 ,同时也解决了两种电磁资料从时间域到频率域的转换问题 .由此实现用TEM反演的方法进行MT静位移的识别和校正 .实例表明 ,这种方法对MT静位移的识别和校正十分有效 .
The inversion for TEM data using the observed magnetic fields instead of using the apparent resistivities avoids the errors caused by the definition of the TEM apparent resistivity. In addition, the inversed results by fitting the magnetic fields of the transmitter source's image to those of the observed magnetic fields are relatively less affected by the conductivity inhomogeneity. The MT apparent curves calculated from the geo-electric model constructed with the TEM inversion results, serve as reference curves for the more reliable correction of MT static shift, and also actualize the transformation from time domain to frequency domain between these two kinds of electromagnetic data. Therefore, TEM inversion can be applied to the correction of the MT static shift. Many field studies show that this method is very effective for the judgment and correction of the MT static shift.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
2001年第6期609-614,共6页
Earth Science-Journal of China University of Geosciences
基金
原煤炭工业部国家Ⅱ类科研项目
甘肃省科委资助项目
