Publication Type |
Journal Article |
School or College |
College of Mines & Earth Sciences |
Department |
Geology & Geophysics |
Creator |
Zhdanov, Michael S. |
Other Author |
Gribenko, A. |
Title |
Rigorous 3D inversion of marine CSEM data based on the integral equation method |
Date |
2007 |
Description |
Marine controlled-source electromagnetic (MCSEM) surveys have become an important part of offshore petroleum exploration. However, due to enormous computational difficulties with full 3D inversion, practical interpretation of MCSEM data is still a very challenging problem. We present a new approach to 3D inversion of MCSEM data based on rigorous integral-equation (IE) forward modeling and a new IE representation of the sensitivity (Fréchet derivative matrix) of observed data to variations in sea-bottom conductivity. We develop a new form of the quasi-analytical approximation for models with variable background conductivity (QAVB) and apply this form for more efficient Fréchet derivative calculations. This approach requires just one forward modeling on every iteration of the regularized gradient-type inversion algorithm, which speeds up the computations significantly. We also use a regularized focusing inversion method, which provides a sharp boundary image of the petroleum reservoir. The methodology is tested on a 3D inversion of the synthetic EM data representing a typical MCSEM survey conducted for offshore petroleum exploration. |
Type |
Text |
Publisher |
Society of Exploration Geophysicists |
Journal Title |
Geophysics |
Volume |
72 |
Issue |
2 |
First Page |
WA73 |
DOI |
10.1190/1.2435712 |
citatation_issn |
168033 |
Language |
eng |
Bibliographic Citation |
Gribenko, A., & Zhdanov, M. (2007). Rigorous 3D inversion of marine CSEM data based on the integral equation method. Geophysics, 72(2), WA73-WA84. |
Rights Management |
(c)Society of Exploration Geophysicists [Include link to article] |
Format Medium |
application/pdf |
Format Extent |
1,094,741 bytes |
Identifier |
ir-main,13925 |
ARK |
ark:/87278/s6223bwr |
Setname |
ir_uspace |
ID |
702595 |
Reference URL |
https://collections.lib.utah.edu/ark:/87278/s6223bwr |