| Autor: |
A.W. El Kaffas, Stefan L. Helwig, Ø. Frafjord, K. Eide, Kerry Key, David Myer, X. Wu |
| Rok vydání: |
2018 |
| Předmět: |
|
| Zdroj: |
Proceedings. |
| ISSN: |
2214-4609 |
| Popis: |
Summary Vertical-vertical CSEM data collected in the Norwegian Sea with a signal optimized for time domain processing was processed in frequency domain (FD) and in time domain (TD). In FD the data was inverted using the regularized Gauss-Newton style 2D inversion code MARE2DEM. For the TD inversion a modified version of MARE2DEM was used that includes a function for the frequency to time-domain transform. A line from a recently acquired data set from the Norwegian Sea was used as test example. Results of the different processing and inversion schemes were similar. Both recovered a resistivity drop in the shallower section and an increase in resistivity in the Jurassic. An uplift of the Jurassic in the eastern part of the line was also recovered by both methods. Well log data confirms the results. Gamma Ray and resistivity logs indicate an increase of porosity in Cretaceous sediments. The TD inversion shows a more pronounced resistivity in the deeper part of the section. This may be contributed to its higher sensitivity for resistive targets at depth. Computationally the FD inversion is considerably more efficient. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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