Retrieval of Body-Wave Reflections Using Ambient Noise Interferometry Using a Small-Scale Experiment
- 25 Downloads
We report the retrieval of body-wave reflections from noise records using a small-scale experiment over a mature oil field. The reflections are obtained by cross-correlation and stacking of the data. We used the stacked correlograms to create virtual source-to-receiver common shot gathers and are able to obtain body-wave reflections. Surface waves that obliterate the body-waves in our noise correlations were attenuated following a standard procedure from active source seismics. Further different strategies were employed to cross-correlate and stack the data: classical geometrical normalized cross-correlation (CCGN), phase cross-correlation (PCC), linear stacking**** and phase weighted stacking (PWS). PCC and PWS are based on the instantaneous phase coherence of analytic signals. The four approaches are independent and reveal the reflections; nevertheless, the combination of PWS and CCGN provided the best results. Our analysis is based on 2145 cross-correlations of 600 s data segments. We also compare the resulted virtual shot gathers with an active 2D seismic line near the passive experiment. It is shown that our ambient noise analysis reproduces reflections which are present in the active seismic data.
KeywordsSeismic interferometry seismic noise cross-correlation body-wave
We thank the Editor, Adrien Oth, and two anonymous reviewers for the constructive comments that improved the original manuscript. We also thank Petrobras for the financial support. AFdN and MS thank CNPq for the Grant 402174/2012-7 (Science without Borders Programme), AFdN thank CNPq for Grant 303817/2014-3. OABD thanks the PRH-ANP-22 (“Programa de Formação em Geologia, Geofísica e Informática no Setor Petróleo & Gás na UFRN”) for his MSc scholarship. The authors also wish to thank the ANP (National Agency of Petroleum, Natural Gas and Biofuels) for the 2D active data used in this work. We wish to thank Flavio Santana for the discussions and his valuable help with the 2D active seismic lines visualization.
- Baskir, E., & Weller, C. E. (1975). Sourceless reflection seismic exploration. Geophysics, 40, 158–159.Google Scholar
- D’hour, V., Schimmel, M., Do Nascimento, A. F., Ferreira, J. M., & Lima Neto, H. C. (2016). Detection of subtle hydromechanical medium changes caused by a small-magnitude earthquake swarm in NE Brazil. Pure and Applied Geophysics (Printed ed.).Google Scholar
- Dias, R. C., Julià, J., & Schimmel, M. (2015). Rayleigh-wave, group-velocity tomography of the Borborema Province, NE Brazil, from ambient seismic noise. Pure and Applied Geophysics, 171, 2863–3174.Google Scholar
- Hanafy, S. M., AlTheyab, A., & Schuster, G. T. (2015). Controlled noise seismology: 85th Annual International Meeting, SEG, Expanded Abstracts, 5102–5106.Google Scholar
- Lin, F., Moschetti, M. P., & Ritzwoller, M. H. (2008). Surface wave tomography of the western United States from ambient seismic noise: Rayleigh and Love wave phase velocity maps. Geophysysical Journal International, 173, 281–298. https://doi.org/10.1111/j1365-1246X.2008.03720.x.CrossRefGoogle Scholar
- Poletto, F., Malusa, M., Miranda, F., & Tinivella, U. (2004). Seismic-while-drilling by using dual sensors in drill strings. Geophysics, 69(5), 1261–1271.Google Scholar
- Schimmel, M. (1999). Phase cross-correlations: Design, comparisons, and applications. Bulletin of the Seismological Society of America, 89(5), 1366–1378.Google Scholar
- Schimmel, M., Stutzmann, E., & Gallart, J. (2011). Using instantaneous phase coherence for signal extraction from ambient noise data at a local to a global scale. Geophysical Journal International, 184(1), 494–506.Google Scholar
- Yang, Y., Ritzwoller, M. H., Lin, F. C., Moschetti, M. P., & Shapiro, N. M. (2008). The structure of the crust and uppermost mantle beneath the western US revealed by ambient noise and earthquake tomography. Journal of Geophysysical Research, 113, B12310. https://doi.org/10.11029/12008JB005833.CrossRefGoogle Scholar
- Yilmaz, Ö. (2001). Seismic data analysis: Processing, inversion and interpretation, of seismic data. Society of Exploration Geophysicists.Google Scholar
- Zhan, Z., Ni, S., Helmberger, D. V., & Clayton, R. W. (2010). Retrieval of moho-reflected shear wave arrivals from ambient seismic noise. Geophysical Journal International, 1, 408–420.Google Scholar