Monitoring the Snøhvit Gas Field Using Seabed Gravimetry and Subsidence

Hugo Ruiz; Martha Lien; Martin Vatshelle; Håvard Alnes; Marco Haverl; Henrietta Sørensen

doi:10.3997/1365-2397.fb2022027

ISSN: 0263-5046
E-ISSN: 1365-2397

Monitoring the Snøhvit Gas Field Using Seabed Gravimetry and Subsidence
Authors Hugo Ruiz¹, Martha Lien¹, Martin Vatshelle¹, Håvard Alnes², Marco Haverl², Henrietta Sørensen²
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Affiliations: ¹ OCTIO Gravitude ² Equinor Energy
Source: First Break, Volume 40, Issue 3, Mar 2022, p. 93 - 96
DOI: https://doi.org/10.3997/1365-2397.fb2022027
- Published online: 01 Mar 2022

Abstract

Gravimetry and subsidence surveys are regularly conducted to monitor the gas-producing Snøhvit field. This technology provides insight into reservoir dynamics with lower costs and shorter turn-around time than widespread 4D seismic data. Through two decades, improvements in survey procedures and instrumentation have led to significantly better sensitivity to both gravity changes and subsidence. This has resulted in improved sensitivity to mass changes and compaction throughout the reservoir. In this article, we analyse the evolution of the noise level in the three surveys at Snøhvit in 2007, 2011 and 2019. We present in detail the results for the 2011–2019 time-lapse, and we describe how these measurements are incorporated into the history-matching routines and used to reduce the uncertainty in key reservoir parameters.

EAGE Publications BV

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References

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Monitoring the Snøhvit Gas Field Using Seabed Gravimetry and Subsidence

First Break 40, 93 (2022); https://doi.org/10.3997/1365-2397.fb2022027

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Monitoring the Snøhvit Gas Field Using Seabed Gravimetry and Subsidence

Abstract

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