瞬变电磁测深法在大地电磁测深曲线静校正中的应用

Application of transient electromagnetic sounding technique to static correction of MT curves

1. 地矿部西北石油地质局, 乌鲁木齐 830011;2. 西安地质学院, 西安 710054

Northwest Bureau of Petroleum Gcology, Urumqi 830011

针对大地电磁测深(MT)中视电阻率曲线的静态畸变问题, 作者提出了用瞬变电磁测深(TEM)校正MT曲线静态位移的方法技术, 并利用此技术在塔里木盆地北部开展了MT实测资料的静校研究。通过对静校前后MT资料的解释对比分析, 说明了用TEM法校正MT曲线静态位移的有效性。

To handle the static shift of apparent resistivity eurves in magnetotelluric (MT) sounding, the paper proposes to correct the static shift by means of transient electromagnetic (TEM) sounding.The technique has been appied to the study of thec static correction for the field MT data from northern Tarim Basin. The comparison between the corrected and uncorrected MT data show that it is effective using thc TEM technique to correct the static shift of the MT curves.