Constraining magnetic amplitude inversion with magnetotelluric data to image volcanic units
- Kaijun Xu (Department of Geophysics, China University of Petroleum (EastChina), Qingdao, Shandong, China) | Yaoguo Li (Center for Gravity, Electrical, and Magnetic Studies, Colorado School of Mines, Golden, CO, USA)
- Document ID
- Society of Exploration Geophysicists
- SEG International Exposition and Annual Meeting, 15-20 September, San Antonio, Texas, USA
- Publication Date
- Document Type
- Conference Paper
- 2019. Society of Exploration Geophysicists
- Magnetotelluric, Volcanics, Magnetics
- 1 in the last 30 days
- 12 since 2007
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We present a method to constrain magnetic inversions by magnetotelluric (MT) sounding data at sparse locations for the purpose of imaging volcanic units in the gas exploration. Magnetic data are a cost-efficient means to map volcanic units but lack the necessary depth information. MT data can provide the required depth information. Integrating MT with 3D magnetic amplitude inversion therefore leads to better recovered effective susceptibility. We have found that the magnetic amplitude inversion with the structural constraint from the 1D blocky inversions at even a small number of MT stations can dramatically improve the inverted effective susceptibility model and help better image the distribution of the volcanics. We demonstrate the approach using a case study from Dayangshu Basin in China.
Presentation Date: Monday, September 16, 2019
Session Start Time: 1:50 PM
Presentation Time: 2:15 PM
Location: Poster Station 1
Presentation Type: Poster
|File Size||742 KB||Number of Pages||5|
Ekblom,H.,1973,Calculation of linear best Lp-approximations:BIT,13,292–300,doi:10.1007/BF01951940.
Li,Y.,S. E.Shearer,M. M.Haney, andN.Dannemiller,2010,Comprehensive approaches to 3D inversion of magnetic data affected by remanent magnetization:Geophysics,75,no.1,L1–L11,doi:10.1190/1.3294766.
Li,Y.,Z.He, andY.Liu,2012,Application of magnetic amplitude inversion in exploration for volcanic units in a basin environment:Geophysics,77,no.5,B219–B225,doi:10.1190/geo2012-0008.1.
Song,X.,Q.Ran,Y.Sun,Y.Wang,L.Yan,F.Chen,2010,Fine description and geologic modeling for volcanic gas reservoirs:Petroleum Exploration and Development,37,458–465,doi:10.1016/S1876-3804(10)60047-X.
Sun,J., andY.Li,2014,Adaptive Lpinversion for simultaneous recovery of both blocky and smooth features in a geophysical model:Geophysical Journal International,197,282–899,doi:10.1093/gji/ggu067.
Tang,H.,X.Zhao,M.Shao,X.Sun,Y.Zhang,P.Cryton,2017,Reservoir origin and characterization of gas pools in intrusive rocks of the Yingcheng Formation, Songliao Basin, NE China:Journal of Petroleum Science and Engineering,84,148–159,doi:10.1016/j.marpetgeo.2017.03.016.