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Abstract

Summary

We demonstrate in this geothermal exploration case study performed in The Netherlands that ambient noise seismic interferometry (ANSI) can be an effective and efficient method for obtaining surface wave dispersion curves, leading to shallow shear-wave velocity-depth profiles that can improve imaging of deep structures. As the ANSI method requires a relatively small fraction of the cost of an active seismic survey, it could be a valuable addition to future subsurface exploration.

A velocity transition was found at a depth of ~55 m, which correlates very well with the transition found in borehole studies. The shear-wave velocities found in this study can be used not only for improved structural imaging of geothermal reservoir potential, but also for computing rigidity and shear modulus of the shallow subsurface, which are vital properties for the construction industry.

Furthermore, it is shown that merging passive and active data enhances the frequency-bandwidth of the data, thereby increasing the resolution of shear-wave velocity-versus-depth profiles in the subsurface.

© EAGE Publications BV
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/content/papers/10.3997/2214-4609.201802603
2018-09-09
2024-04-19

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Near-Surface Shear-Wave Velocity Profiling with Ambient Noise Seismic Interferometry for Geothermal Exploration
Conference Proceedings 2018, 1 (2018); https://doi.org/10.3997/2214-4609.201802603
/content/papers/10.3997/2214-4609.201802603
/content/papers/10.3997/2214-4609.201802603
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