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Volume 42, Issue 5
  • ISSN: 0263-5046
  • E-ISSN: 1365-2397

Abstract

Abstract

Multi-component data recorded during Ocean-Bottom Seismic (OBS) surveys captures both PP and PS events. PP and PS images provide complementary information about reservoir properties. The quality of both these types of images depends on the accuracy of the P-wave and S-wave velocity models, and , respectively. In this paper, focusing on data from a shallow water OBS survey in the Central North Sea, we show, first, how a high-resolution 65 Hz model, obtained using Time-Lag FWI, can improve the imaging from the shallow to the deep. Similar improvements are then shown for PS data using a 30 Hz model obtained from PS reflection-FWI. The most remarkable achievement is the flattening of the undulating chalk and top reservoir surfaces on both the and FWI Images, obtained from PP and PS data, respectively, which was confirmed by drilling observations. These derived and FWI Images reduce the uncertainty in reservoir characterisation.

EAGE Publications BV
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/content/journals/10.3997/1365-2397.fb2024037
2024-05-01
2025-07-11

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References

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/content/journals/10.3997/1365-2397.fb2024037
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Increasing P-Wave and S-Wave Velocity Resolution with FWI — a North Sea Shallow Water Case Study
First Break 42, 37 (2024); https://doi.org/10.3997/1365-2397.fb2024037
/content/journals/10.3997/1365-2397.fb2024037
/content/journals/10.3997/1365-2397.fb2024037
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  • Article Type: Research Article

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