Large-scale parallel 3D inversion of frequency and time-domain AEM data
- Martin Cuma (University of Utah) | Michael Zhdanov (University of Utah) | Leif Cox (TechnoImaging)
- Document ID
- Society of Exploration Geophysicists
- 2016 SEG International Exposition and Annual Meeting, 16-21 October, Dallas, Texas
- Publication Date
- Document Type
- Conference Paper
- 2016. Society of Exploration Geophysicists
- 3D, Parallel, Electromagnetic, Airborne survey, Inversion
- 0 in the last 30 days
- 10 since 2007
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3D inversion of airborne electromagnetic data is a challenging task due to the large amounts of data collected over relatively large areas. In this paper we detail an inversion algorithm based on a moving sensitivity domain approach using the integral equation method coupled with a multistep regularized conjugate gradient inversion. To tackle the computational demands, along with the reduction of the problem due to the moving sensitivity domain approach, we also parallelize the problem over the data using Message Passing Interface (MPI) and OpenMP. The workflow of the interpretation includes 1D inversion to obtain a background structure that serves as an input to the 3D inversion. The background is either a half-space, unique under each data point, in the case of frequency domain, or layered background in the case of time domain inversion. We demonstrate the effectiveness of the developed method and computer software by 3D inversion examples of frequency and time domain airborne EM surveys.
Presentation Date: Tuesday, October 18, 2016
Start Time: 1:25:00 PM
Presentation Type: ORAL
|File Size||1 MB||Number of Pages||5|
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