Joint inversion of time-frequency electromagnetic and magnetotelluric data

被引：0

作者：

Hu Z. ^{[1
]}

Liu X. ^{[1
]}

Wang Z. ^{[1
]}

He Z. ^{[2
,3
]}

Yang J. ^{[1
]}

机构：

[1] GME and Geochemical Surveys, BGP Inc., CNPC, Hebei, Zhuozhou

[2] Department of Earth and Space Sciences, Southern University of Science and Technology, Guangdong, Shenzhen

[3] Shenzhen Key Laboratory of Deep Offshore Oil and Gas Exploration Technology, Southern University of Science and Technology, Guangdong, Shenzhen

来源：

Shiyou Diqiu Wuli Kantan/Oil Geophysical Prospecting | 2023年 / 58卷 / 03期

关键词：

joint inversion; magnetotelluric; misfit data weighting; time-frequency electromagnetic;

D O I：

10.13810/j.cnki.issn.1000-7210.2023.03.025

中图分类号：

P3 [地球物理学];

学科分类号：

0708 ;

摘要：

The time-frequency electromagnetic method is a controlled-source electromagnetic method, which has a strong anti-interference ability and a high resolution for the electrical layer in the middle and shallow layers. However, it is limited by the lowest excitation frequency and has a limited reflection of the deep layer. The magnetotelluric method is a natural source electromagnetic method, which features low measurement frequency and large detection depth. Hence, the two methods are complementary. In this paper, on the basis of Occam's inversion algorithm, a new joint weighting method is proposed for the joint inversion between time-frequency electromagnetic and magnetotelluric data. The data of model and field tests show that the joint inversion of time-frequency electromagnetic and magnetotelluric data can improve the resolution of shallow electrical anomalies, optimize the detection accuracy of deep electrical layers, and improve the ability of electromagnetic exploration to solve geological problems. © 2023 Science Press. All rights reserved.

引用

页码：720 / 727

页数：7