Hostname: page-component-76fb5796d-vvkck Total loading time: 0 Render date: 2024-04-25T09:06:57.171Z Has data issue: false hasContentIssue false
  • English
  • Français

Inverse-Ray Imaging of 2D Layered Structures from Seismic Reflection Data

Published online by Cambridge University Press:  05 May 2011

Tan K. Wang  and
S. C. Tan
Tan K. Wang*
Affiliation:
Institute of Applied Geophysics, National Taiwan Ocean University, Keelung, Taiwan 20224, R.O.C., tkwang@mail.ntou.edu.tw
S. C. Tan*
Affiliation:
Institute of Applied Geophysics, National Taiwan Ocean University, Keelung, Taiwan 20224, R.O.C., tkwang@mail.ntou.edu.tw
*
*Associate Professor
**M.S. student
Get access

Abstract

Shooting angle of an inverse ray for imaging 2D multi-layered structures from reflected travel-times is derived in a closed form. By considering the normal incidence of two neighboring rays reflected at interfaces when sources are at the same locations as receivers, the traveling distance and direction of two inverse-rays are determined successively from the lowermost layer to the uppermost layer. This approach is similar to and also confirmed with the Huygens' principle that the equal travel-time along a wave front (perpendicular to the rays) is conserved. The closed-form solution of the inverse rays is further applied to image a complex structure of a ramp-flat fault with eleven layers. The results demonstrate that the inverse-ray imaging from travel-time picks of all layers is superior to that picked by a layer-stripping approach.

Keywords

Inverse rayReflected waveTravel timeRamp-flat fault
Type
Articles
Information
Journal of Mechanics , Volume 19 , Issue 1 , March 2003 , pp. 191 - 196
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2003

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1Keydar, S., Koren, Z., Kosloff, D. and Landa, E., “Optimum Time-to-Depth Conversion,” Geophysics, 54, pp. 1001–1005 (1989).CrossRefGoogle Scholar
2May, B. T. and Covey, J. D., “An Inverse Ray Method for Computing Geologic Structures from Seismic Reflections — Zero-Offset Case,” Geophysics, 46, pp. 268–287 (1981).CrossRefGoogle Scholar
3Feng, R. and McEvilly, T. V., “Interpretation of Seismic Reflection Profiling Data for the Structure of the San Andreas Fault Zone,” Bull. Seism. Soc. Am., 73, pp. 1701–1720 (1983).CrossRefGoogle Scholar
4Warner, M., “Migration — Why Doesn't It Work for Deep Continental Data.” Geophys. J. R. Astr. Soc., 89, pp. 21–26 (1987).CrossRefGoogle Scholar
5Raynaud, B., “A 2-D, Ray-Based, Depth Migration Method for Deep Seismic Reflections,” Geophys. J., 93, pp. 163–171 (1988).CrossRefGoogle Scholar
6Rimando, P. M. and Manuel, G. A., “Depth Conversion in Geologically Complex Structures: Case Study in Offshore Southwest Palawan,” J. Asi. Earth Sci., 15, pp. 241–250 (1997).CrossRefGoogle Scholar
7Chang, K. C., Wang, T. K., Liu, C. S. and Ko, W. K., “Application of the 2D Time to Depth Transformation on a 3D Layered Model of Hoping Basin in Ryukyu Forearc,” EOS, Trans. Am. Geophys. Un., 79, p. W69 (1998).CrossRefGoogle Scholar
8Tan, S. C., “Imaging of 2D Complex Structures from Inverse Rays,” M. S. Thesis, in Chinese, Institute of Applied Geophysics, National Taiwan Ocean University, Taiwan, R.O.C. (2000).Google Scholar
9Yilmaz, O., Seismic Data Analysis: Processing, Inversion, and Interpretation of Seismic Data, Series: Investigations in Geophysics, No. 10, Doherty, S. F., ed., Society of Exploration Geophysicists, Tulsa, U.S.A., pp. 288–1906 (2001).CrossRefGoogle Scholar
10McClay, K. R., “2D and 3D Analogue Modeling of Extensional Fault Structures: Templates for Seismic Interpretation,” Pet. Geo., 1, pp. 163–178 (1995).CrossRefGoogle Scholar
11Wang, T. K., “Imaging of Tectonic Structures from 3D Inverse-Ray Method: Application to a Ryukyu Forearc Basin,” Joint Geosciences Assembly, OCEANS, Taiwan, R.O.C., pp. B-4–B-5 (2001).Google Scholar