Least square migration of synthetic aperture data for towed streamer electromagnetic survey
- Xiaolei Tu (University of Utah) | Michael S. Zhdanov (University of Utah)
- 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
- Electrical/resistivity, Imaging, Electromagnetics, Salt dome, Migration
- 4 in the last 30 days
- 5 since 2007
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Efficient data acquisition technique capable of collecting a large volume of electromagnetic (EM) data over extensive areas rapidly and economically. However, the interpretation of TSEM data is still a challenging problem. We propose to solve this problem by migrating the optimal synthetic aperture (OSA) data for TSEM survey. We first represent the OSA data as the solution of Lippmann-Schwinger equation, and then demonstrate that the migration of OSA data is just the inner product of the backward-propagated and forward-propagated EM fields. The migration problem was solved iteratively within the general framework of the reweighted regularized conjugate gradient method. The proposed method was tested with two synthetic models. We also applied it to the dataset collected in the Barents Sea and revealed a resistive layer at a depth of about 500 m.
Presentation Date: Monday, September 16, 2019
Session Start Time: 1:50 PM
Presentation Time: 2:15 PM
Location: Poster Station 6
Presentation Type: Poster
|File Size||518 KB||Number of Pages||5|
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