李涛, 赵宁, 秦策,等.大地电磁一维时移反演研究[J].河南理工大学学报（自然科学版）,2023,42(6):61-68.

LI T, ZHAO N, QIN C, et al.On the magnetotelluric one-dimensional time-lapse inversion[J].Journal of Henan Polytechnic University(Natural Science) ,2023,42(6):61-68.

大地电磁一维时移反演研究

李涛1, 赵宁1,2, 秦策1, 米晓利3

1.河南理工大学 物理与电子信息学院，河南 焦作  454000;2.河南理工大学 河南省瓦斯地质与瓦斯治理重点实验室-省部共建国家重点实验室培育基地，河南 焦作  454000;3.中国石油集团 东方地球物理勘探有限责任公司，河北 涿州  072750

摘要:针对大地电磁反演法易受环境因素干扰且未考虑时间连续性的问题，基于Tikhonov正则化理论，在传统目标函数后添加时间约束项进行大地电磁时移同时反演研究，通过合成数据模型对比独立反演与同时反演结果。结果表明，两种反演方法均可反映异常体位置信息，但使用同时反演法可有效改善数据缺失对反演结果的影响，且储层电阻率变化过程更连续；同时反演法利用每个时间步长的观测数据，反演结果更精确。

关键词:大地电磁;时移反演;数据缺失;正则化因子;监测技术

doi:10.16186/j.cnki.1673-9787.2021050122

基金项目:中国石油天然气股份有限公司科学研究与技术开发项目（2022DJ5503）；国家自然科学基金资助项目（41904078）；河南省瓦斯地质与瓦斯治理重点实验室-省部共建国家重点实验室培育基地开放基金资助项目（WS2020B11）

收稿日期:2021/05/27

修回日期:2021/10/07

出版日期:2023/11/25

On the magnetotelluric one-dimensional time-lapse inversion

LI Tao1, ZHAO Ning1,2, QIN Ce1, MI Xiaoli3

1.School of Physical and Electrical Engineering，Henan Polytechnic University，Jiaozuo  454000，Henan，China;2.State Key Laboratory Cultivation Base for Gas Geology and Gas Control，Henan Polytechnic University，Jiaozuo  454000，Henan，China;3.Bureau of Geophysical Prospecting Inc.，China National Petroleum Corporation，Zhuozhou  072750，Hebei，China

Abstract:In response to the problem of susceptibility to environmental interference and failure to consider time continuity in the magnetotelluric inversion method，in this paper，time constraint item was added after traditional objective function to carry out the research of time-lapse magnetotelluric simultaneous inversion method based on Tikhonov regularization theory，then the results of independent inversion and simultaneous inversion were compared through panel data model.The results shows both inversion methods can reflect the position information of anomaly body，but the simultaneous inversion method can effectively improve the effect of missing data on inversion results，and the change process of reservoir resistivity is more continuous.It is found that more accurate inversion results can be obtained through the utilization of observation data in each time step in simultaneous inversion method.

Key words:magnetotelluric;time-lapse inversion;data missing;regularization factor;monitoring technology