Abstract
We investigate the deep subsurface structure below the artificial reservoir at the Soultz Hot Dry Rock (HDR) site in France by a reflection method which uses acoustic emission (AE) as a wave source. In this method, we can detect reflected waves by examining the linearity of a three-dimensional hodogram. Additionally for imaging a deep subsurface structure, we employ a three-dimensional inversion with a restriction of wave polarization angles and with a compensation for a heterogeneous source distribution.
We analyzed 101 AE wave forms observed at the Soultz site during the hydraulic testing in 1993. Some deep reflectors were revealed by this method. The bottom of the artificial reservoir that is presumed from all of the AE locations in 1993 was delineated at the depth of about 3900 m as a reflector. Other deeper reflectors were detected below the reservoir, which would not have been detected using conventional methods. Furthermore these reflectors agreed with the results of the tri-axial drill-bit VSP (Asanuma et al, 1996).
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References
Asanuma, H., Park, J. N., Niitsuma, H., and Baria, R. (1996), Characterization of Subsurface Structure at Soultz-sous-Forêts, France by Triaxial Drill-bit VSP, SEG Expanded Abstracts, 202–205,
Baria, R., Garnish, J., Baumgärtner, J., Gérad, A., and Jung, R. (1995), Recent Developments in the European HDR Research Programme at Soultz-sous-Forêts (France), Proc. World Geotherm. Cong., 2631–2637.
Baria, R., Gérad, A., Baumgärtner, J., and Garnish, J. (1996), Progress at the European HDR Site at Soultz, France, Proc. 3rd International HDR Forum, 73–74.
Berkhout, A. J., Seismic Migration—Imaging of Acoustic Energy by Wave Field Extrapolation, vol. 14A, Theoretical Aspects (Elsevier, Amsterdam and New York 1980).
Iio, Y. (1984), Micro-Fracture Induced by an Explosion, J. Seism. Soc. Japan 37, 109–118 (in Japanese).
Nagano, K., Niitsuma, H., and Chubachi, N., A new automatic AE source location algorithm for downhole triaxial AE measurement. In Progress in Acoustic Emission III (eds. Yamaguchi, K. et al.). (The Japanese Soc. for NDI 1986), pp. 396–406.
Niitsuma, H., Nakatsuka, K., Chubachi, N., Yokoyama, H., and Takanohashi, M. (1985), Acoustic Emission Measurement of Geothermal Reservoir Cracks in Takinoue (Kakkonda) Field, Japan, Geothermics 14, 525–538.
Samson, J. C. (1977), Matrix and Stokes Velocity Representations of Detectors for Polarized Waveforms: Theory, with Some Applications to Teleseismic Waves, Geophys. J. R. Astr. Soc. 51, 583–603.
Soma, N., and Niitsuma, H. (1997), Identification of Structures within the Deep Geothermal Reservoir of the Kakkonda Field (Japan) by a Reflection Method Using Acoustic Emission as a Wave Source, Geothermics 26, 43–64.
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© 1997 Springer Basel AG
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Soma, N., Niitsuma, H., Baria, R. (1997). Estimation of Deeper Structure at the Soultz Hot Dry Rock Field by Means of Reflection Method Using 3C AE as Wave Source. In: Talebi, S. (eds) Seismicity Associated with Mines, Reservoirs and Fluid Injections. Pageoph Topical Volumes. Birkhäuser, Basel. https://doi.org/10.1007/978-3-0348-8814-1_17
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DOI: https://doi.org/10.1007/978-3-0348-8814-1_17
Publisher Name: Birkhäuser, Basel
Print ISBN: 978-3-7643-5878-5
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