Detection of coalbed fractures with P-wave azimuthal AVO in 3-D seismic exploration

详细信息    查看全文

• 作者：Guofa Li (1)
  Suping Peng (1)
  Bingshou He (1)
  Xiaobo Peng (1)
  Chunfang Yuan (1)
  Chaoyuan Hu (1)
  
• 关键词：seismic exploration ; azimuthal AVO ; anisotropy ; coalbed fracture ; reflection amplitude
• 刊名：Chinese Science Bulletin
• 出版年：2005
• 出版时间：January 2005
• 年：2005
• 卷：50
• 期：1-supp
• 页码：146-150
• 全文大小：638KB
• 参考文献：1. Zhang, T. E., Wen, T. W., Lu, S. Z., Basic Knowledge to Prevent Coal and Gas from Exploding (in Chinese), Beijing: Coal Industry Press, 1990, 7鈥?.
  2. Luo, S. X., Li, L. M., Method and application of predicting medium fracture based on shear-wave separating theory, Journal of Chengdu University of Technology, 2003, 30(1): 52鈥?9.
  3. Peng, C. B., Research of fracture distribution by S-wave split in physical model, Chinese Journal of Geophysics, 1989, 32(suppl): 163鈥?73.
  4. Wei, J. X., S-wave split of rock and observation of anisotropy, Geophysical Prospecting for Petroleum, 1993, 32(1): 60鈥?7.
  5. Assad, J. M., A physical model study of microcrack-induced anisotropy, Geophysics, 1992, 57(12): 1562鈥?570. CrossRef
  6. Liu, M., Gou, J. W., Yu, G. M., Search gas reservoir of coal bed gas with seismic anisotropism of coalbed fracture, Coal Geology of China, 2001, 13(3): 57鈥?8.
  7. Tatham, R. H., A physical model study of shear-wave splitting and fracture intensity, Geophysics, 1999, 57(4): 647鈥?52. CrossRef
  8. Zhang, F., He, Z. H., Hong, D. J. et al., Physical model experiment of wave field characteristic relating to reservoir fracture, Oil Geophysical Prospecting, 1999, 34(6): 675鈥?81.
  9. Gan, W. Q., Dong, L. G., Ma, Z. T., Numerical modeling and study of S-wave splitting in fracture media, Journal of Tongji university, 2000, 28(5): 547鈥?51.
  10. Li, G. F., Peng, S. P., He, B. S., The key Problems and its solutions in processing converted-wave seismic data, Journal of china university of mining and technology, 2005, 34(1): 41鈥?5.
  11. Yu, J., Hu, J. X., Prestack migration deconvolution + AVO inversion, Expanded Abstracts of 73th SEG Annual Mtg, 2003, 227鈥?30.
  12. Thomsen, L., Elastic anisotropy due to aligned cracks in porous rock, Geophysical Prospecting, 1995, 43(3): 805鈥?29. CrossRef
  13. Lynn, H. B., Bates, C. R., The effect of azimuthal anisotropy in P-wave 3-D seismic, Expanded Abstracts of 65th SEG Annual Mtg, 1995, 727鈥?30.
  14. Krasovec, M. L., Rodi, W., Toksoz, M. N., et al., Sensitivity analysis of amplitude variation with offset (AVO) in fractured media, Expanded Abstracts of 68th SEG Annual Mtg, 1998, 910鈥?13
  15. Liu, Y., Azimuthal AVO in anisotropic medium, Oil Geophysical Prospecting, 1999, 34(3): 260鈥?67.
  16. Gui, Z. X., He, Z. H., The influence fro P-wave by fracture parameter and the research of feasibility about the fracture determining, Computing Techniques for Geophysical and Geochemical Exploration, 2003, 25(1): 35鈥?8
  17. Schoenberg, M., Douma, J., Elastic wave propagation in media with parallel fractures and aligned cracks, Geophysical Prospecting, 1988, 36: 571鈥?90. CrossRef
  18. Xie, G. S., Simulation of elastic waves in fracture medium, Oil Geophysical Prospecting, 1994, 29(5): 538鈥?44.
  19. Gui, Z. X., He, Z. H., The simulating and characters of P-wave seismic record in the fracture medium, Chinese Journal of Computational Physics, 2004, 21(1): 91鈥?4.
  20. Thomsen, L., Weak elastic anisotropy, Geophysics, 1986, 51(10): 1954鈥?966. CrossRef
  21. Ruger, A., P-wave reflection coefficients for transversely isotropic models with vetical and horizontal axis of symmetry, Geophysics, 1997, 62(3): 713鈥?21. CrossRef
  22. Ruger, A., Variation of P-wave reflectivity with offset and azimuth in anisotropic media, Geophysics, 1998, 63(3): 935鈥?47. CrossRef
  23. Mallick, S., Craft, K. L., Meister, L. J. et al., Determination of the principal directions of azimuthal anisotropy from P-wave seismic Data, Geophysics, 1998, 63(2): 692鈥?06. CrossRef
  24. Lynn, H. B, Simon, M., Bates, C. R. et al., Azimuthal anisotropy in P-wave 3-D (multiazimuth)data, The Leading Edge, 1996, 923鈥?28.
  25. Montoya, P., Fisher, W., Estimation of fracture orientation and relative intensity using azimuthal variation of P-wave AVO responses and oriented core data in the Tacata Field, Venezuela, Expanded Abstracts of 72th SEG Annual Mtg, 2002, 277鈥?80.
  26. Ji, Y. X., Detection of fractured reservoir with seismic data, Progress in Exploration Geophysics, 2002, 25(5): 28鈥?5.
  27. Antonio, C. B., Ramos, A. C. B., Thomas, L. D. et al., 3-D AVO analysis and modeling applied to fracture detection in coalbed methane reservoirs, Geophysics, 1997, 62(6): 1683鈥?695. CrossRef
  28. Xong, J. L, Zhang, B. Q., Li, G. F., Azimuthal AVO inversion of 3-D P-wave and analysis of resistibility to noise, Expanded Abstract CPS/SEG International Conference, 2004, 785鈥?90.
  29. Zhu, P. M., Wang, J. Y., Inverting reservoir fracture density using P-wave AVO data, Geophysical Prospecting for Petroleum, 2001, 40(2): 2鈥?2.
  30. Swan, H. W., Amplitude and phase correction for AVO analysis, Expanded Abstracts of 72th SEG Annual Mtg, 2002, 277鈥?80.
  
• 作者单位：Guofa Li (1)
  Suping Peng (1)
  Bingshou He (1)
  Xiaobo Peng (1)
  Chunfang Yuan (1)
  Chaoyuan Hu (1)
  
  1. School of Resources and Safety Engineering, China University of Mining and Technology, 100024, Beijing, China
  
• ISSN：1861-9541

文摘

The detection of fractures is important for production and safety in coal fields. Subsurface fractures result in azimuthal anisotropy of the seismic wave, and the amplitude of reflection wave varies with offset and azimuth. In case of weak anisotropy, the reflection coefficients of P-wave are concisely denoted as the analytic function of fracture parameters. For the purpose of predicting the coalbed fracture distribution through analyzing variation of the reflection amplitudes with offset and azimuth, 3-D seismic data with full-azimuth were acquired in a coal field in Huainan, Anhui Province. The careful analysis and process of seismic data showed that the reflection amplitude of the primary coalbed varied with azimuth in much consistent with the theoretical model. The conclusion was drawn that the coal-bed fracture in this coal field could be predicted through the method of the P-wave azimuthal AVO.