Abstract
Borehole acoustic reflection logging can provide high resolution images of near-borehole geological structure. However, the conventional seismic migration and imaging methods are not effective because the reflected waves are interfered with the dominant borehole-guided modes and there are only eight receiving channels per shot available for stacking. In this paper, we apply an equivalent offset migration method based on wave scattering theory to process the acoustic reflection imaging log data from both numerical modeling and recorded field data. The result shows that, compared with the routine post-stack depth migration method, the equivalent offset migration method results in higher stack fold and is more effective for near-borehole structural imaging with low SNR acoustic reflection log data.
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References
Bancroft, J. C., Geiger, H. D., and Margrave, G. F., 1998, The equivalent offset method of prestack time migration: Geophysics, 63(6), 2042–2053.
Chabot, L, Henley, D.C., Brown, R.J. and Bancroft, J.C., 2002, Single-well seismic imaging using the full waveform of an acoustic sonic: SEG Int’l Exposition and 72nd Annual Meeting, Salt Lake City, Utah.
Docherty, P., 1991, A brief comparison of some Kirchhoff integral formulas for migration and inversion: Geophysics, 56(8), 1164–1169.
Hornby, B. E., 1989, Imaging of near-borehole structure using full-waveform sonic data: Geophysics, 54(6), 747–757.
Tang, X. M., 2004, Imaging near-borehole structure using directional acoustic-wave measurement: Geophysics, 69(6), 1378–1386.
Tang, X. M., Zheng, Y., and Patterson, D., 2007, Processing array acoustic-logging data to image near-borehole geological structures: Geophysics, 72(2), E87–E97.
Tao, G., He, F. J., Wang, B., Wang, H., and Li, L. S., 2008a, Applying the acoustic reflection image logging to the 3-D waveform simulation method research both in the homogeneous and the heterogeneity formations: Science in China Series D: Earth Sciences, 38(1), 166–173.
Tao, G., He, F. J., Yue, W. Z., and Chen, P., 2008b, Processing of array sonic logging data with multi-scale STC technique: Petroleum Science, 5(3), 238–241.
Wang, N. X., Su, H., Liu, W. M., and Ou, Y., 1998, The reflected acoustic wave imaging analysis in the acoustic full-wave logging: Well Logging Technology (in Chinese), 22(4), 278–283.
Wang, Y., Zhu, Y. P., and Yang, H. Z., 2000, The research on applying the common scatter point imaging to process the 3-D seismic data with low signal-noise ratio: Oil Geophysical Prospecting, 35(1), 20–26.
Wang, W., Yin, J. J., Liu, X. W., Zhao, J. M., Wang, B., and Huang, Y., 2007, Equivalent migration method and its application: Chinese Journal of Geophysics, 50(6), 1823–1830.
Yin, J. J., Wang, W., Wang, B., Liu, X. W., Li, W. H., and Zhao, Z. W., 2007, The research on the multiple wave attenuation technique based on the scatter imaging: Geophysical Prospecting for Petroleum, 46(4), 319–323.
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This work was supported by the National Natural Science Foundation of China (Grant No. 50674098), the 863 Program (Grant No. 2006AA06Z207 & 2006AA06Z213), and the 973 Program (Grant No. 2007CB209601).
Zhang Tiexuan holds a B.S. degree in Well Logging from China University of Petroleum-East China and a Masters degree in Geological Engineering from China University of Petroleum-Beijing. Now she is studying for her PhD degree in geological resources and geological engineering at the University of Petroleum-Beijing. She is currently concentrating on acoustic logging and wireline formation testing and, at the same time, undertaking well logging method research for heavy oil reservoirs.
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Zhang, T., Tao, G., Li, J. et al. Application of the equivalent offset migration method in acoustic log reflection imaging. Appl. Geophys. 6, 303–310 (2009). https://doi.org/10.1007/s11770-009-0041-y
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DOI: https://doi.org/10.1007/s11770-009-0041-y