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Abstract

Summary

Aiming to unlock the full potential of Abu Dhabi’s exploration and development targets, late 2018 saw the launch of the world’s largest Ocean bottom sensor (OBS) campaign to date, deployed across a surface area of 26,000 square kilometres. In all, over 2 million ocean bottom nodes and sensors were deployed, resulting in approximately 700 billion recorded seismic traces.

The data were acquired in an ultra-shallow water environment, with water depths between 3 – 50m. The regional geology is characterised by: a hard and rugose water bottom; a complex near surface; and a basin scale layer-cake geology with local variations created by channels and karsts, overlaying deeper salt related structures. The complex near surface is defined by a laminated sequence of carbonates, anhydrite and shale layers, exhibiting very high levels of apparent transverse anisotropy and strong velocity inversions.

In the following paper, we will discuss these two topics, FWI and demultiple, in detail and demonstrate that they are the key enablers in delivering a high quality, regional subsurface image from the world’s largest OBS survey.

© EAGE Publications BV
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/content/papers/10.3997/2214-4609.202310700
2023-06-05
2026-02-14

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References

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World’s Largest OBS Processing and Imaging: New Insights to the Ultra-Shallow Water Offshore Abu Dhabi
Conference Proceedings 2023, 1 (2023); https://doi.org/10.3997/2214-4609.202310700
/content/papers/10.3997/2214-4609.202310700
/content/papers/10.3997/2214-4609.202310700
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