• 责任者：Yang Tianchun (College of Civil Engineering ; Hunan University of Science and Technology ; Xiangtan 411201 ; China) ; Wang Yanlong
• 刊名：Xinjiang Petroleum Geology
• 出版年：2013
• 卷期：34(6)
• 关键词：大地电磁法 ; magnetotelluric methods ; 隐伏构造 ; subsurface structure ; 正演模拟 ; forward modelling
• 页码：p.697-701
• 图表：7 illus., 1 table, 11 refs.
• 分类号：1600
• issnNo：ISSN1001-3873
• isbnNo：CN65-1107/TE

     Because of the complexity of hidden geological structures and their apparent resistivity＇ s convergent rate of magnetotellurie （MT） method to true resistivity having influence on simulation precision, this paper makes the forward simulation of impedance phase and apparent resistivity of MT method for hidden faults. The finite element method is used to simulate hidden faults＇ MT anomalies.The appar- ent resistivity and impedance phase of models are calculated, and then the forward modeling results of transverse electric mode and trans- verse magnetic mode are analyzed. The simulation results show that the impedance phase is less than 45° when resistivities decrease with depth, and the impedance phase is bigger than 45° when resistivities increase. Also, the impedance phase can represent the electric charac- teristics of underground media, and its sensitivity is higher than the apparent resistivity. At the same time, the type of hidden geological structure can be distinguished from pseudo-sections of impedance phase.