4D Seismic Modelling Applied to CO2 Leak Detection: Sensitivity Analysis - Part A

C. Le Magoarou; E. Schissele-Rebel; P. Thore

doi:10.3997/2214-4609.202021056

4D Seismic Modelling Applied to CO2 Leak Detection: Sensitivity Analysis - Part A
Authors C. Le Magoarou¹, E. Schissele-Rebel¹, P. Thore¹
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Publisher: European Association of Geoscientists & Engineers
Source: Conference Proceedings, 1st Geoscience & Engineering in Energy Transition Conference, Nov 2020, Volume 2020, p.1 - 5
DOI: https://doi.org/10.3997/2214-4609.202021056

Abstract

Summary

When injecting CO2 in a reservoir interval, one of the main risk to monitor is the possibility of a leak into an upper reservoir interval through a fault or a legacy well. This paper presents a 1D sensitivity study on the key parameters accounting for the leak detectability using time-lapse seismic: the ambient noise and the repeatability of the acquisition device used. Dealing with thin layers of CO2 also raises new concerns on the reliability of the amplitude, thickness and position of the detected anomaly because of the tuning phenomena. The tuning thickness is a function of the frequency of the wavelength used in the modelling process as it is equal to a fourth of the dominant frequency.

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2020-11-16

2024-04-28

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References

Arts, R., Eiken, O., Chadwick, Α., Zweigel, P., van der Meer, L., and Zinszner, B.
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4D Seismic Modelling Applied to CO2 Leak Detection: Sensitivity Analysis - Part A

Conference Proceedings 2020, 1 (2020); https://doi.org/10.3997/2214-4609.202021056

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4D Seismic Modelling Applied to CO2 Leak Detection: Sensitivity Analysis - Part A

Abstract

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The natural combination of full and image‐based waveform inversion

Poststack diffraction imaging using reverse‐time migration

Characterizing the effect of elastic interactions on the effective elastic properties of porous, cracked rocks

Fracture detection by Gaussian beam imaging of seismic data and image spectrum analysis

Laboratory measurements of guided‐wave propagation within a fluid‐saturated fracture