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Marine CSEM inversion based on the regularized conjugate gradient method and EM migration
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- Ueda Takumi
- Institute for Geo-resources and Environment, Geological Survey of Japan, AIST
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- Zhdanov Michael S.
- Department of Geology and Geophysics, University of Utah
Bibliographic Information
- Other Title
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- 電磁マイグレーションを用いたTikhonov正則化共役勾配法による海洋CSEM法の逆解析
- デンジ マイグレーション オ モチイタ Tikhonov セイソクカ キョウヤク コウバイホウ ニ ヨル カイヨウ CSEMホウ ノ ギャクカイセキ
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Description
In this paper, we describe an application of the Tikhonov regularization and electromagnetic (EM) migration to an inverse problem of a typical marine controlled-source EM (MCSEM) method used for offshore hydrocarbon exploration.<br> The 3-D modeling and inversion of MCSEM data is a very challenging problem because of the number of computations required in the case of the multi-transmitter and multi-receiver data acquisition systems used in these surveys.<br> To overcome this difficulty, we apply Tikhonov regularized inversion along with the Jacobian matrix computed using the principles of EM migration. In order to obtain a stable solution, we use the conjugate gradient method to solve the iterative regularized inversion. The multigrid quasi-linear approximation developed by Ueda and Zhdanov (2006) is introduced for accelerating the computation, in the forward stage of the iterative inversion.<br> The developed methods are tested on synthetic examples of 3-D MCSEM inversion for the model with the resistive anomaly embedded in the conductive sediment; we have found that the methods can be applied effectively to the interpretation of MCSEM data.<br>
Journal
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- BUTSURI-TANSA(Geophysical Exploration)
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BUTSURI-TANSA(Geophysical Exploration) 62 (3), 295-306, 2009
The Society of Exploration Geophysicists of Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390001206496555904
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- NII Article ID
- 10025643382
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- NII Book ID
- AN10028069
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- ISSN
- 18814824
- 09127984
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- NDL BIB ID
- 10438387
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL Search
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed