Angle-Domain Gathers Computation Using Poynting Vector of Two-Way Acoustic Wave Equation

Abstract:

Based on two-way acoustic wave equation, we present a method for computing angle-domain common-image gathers for reverse time migration. The method calculates the propagation direction of source wave-fields and receiver wave-fields according to expression of energy flow density vectors (Poynting vectors) of acoustic wave equation in space-time domain to obtain the reflection angle, then apply the normalized cross-correlation imaging condition to achieve the angle-domain common-image gathers. The angle gathers obtained can be used for migration velocity analysis, AVA analysis and so on. Numerical examples and real data examples demonstrate the effectiveness of this method.

• Periodical: Advanced Materials Research (Volumes 962-965)
• Pages: 2984-2987
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.962-965.2984
• Online since: June 2014
• Authors: Jia Jia Yang, Bing Shou He*, Ting Chen
• Keywords: Angle-Domain Gathers, AVA, Poynting Vector, Reverse-Time Migration

References

[1] Whitemore, N. D., Iterative depth migration by backward time propagation. Expanded Abstracts of 53rd SEG Annual International Meeting(1983), p.827~830.

DOI: 10.1190/1.1893867

[2] Loewenthal, D. and Mulfti, I. R., Reverse time migration in spatial frequency domain. Geophysics(1983), p.627~635.

DOI: 10.1190/1.1441493

[3] Memechan, G. A., Migration by extrapolation of time dependent boundary values. Geophysical Prospecting(1983), p.413~420.

DOI: 10.1111/j.1365-2478.1983.tb01060.x

[4] Chattopadhyay, S. and Mcmechan, G. A., Imaging conditions for prestack reverse-time migration. Geophysics(2008), p. S81~S89.

DOI: 10.1190/1.2903822

[5] Bingshou, H., Huixing, Z, Xiucheng, W and Meinian, C., Imaging conditions for two-way acoustic wave equation pre-stack reverse-time depth migration(2010), p.237~243 (In Chinese).

[6] Paul, S and Sergey, F., Angle-domain common-image gathers by wavefield continuation method. Geophysics(2003), p.1065~1074.

DOI: 10.1190/1.1581078

[7] Thomas, A. D. and Graham, A. W., RTM angle gathers using Poynting vectors. SEG San Antonio 2011 Annual Meeting(2011), p.3109~3113.

DOI: 10.1190/1.3627841

[8] Yongguang, M and Zhenglin, P., 3D complex mudium seismic numerial simulation. Beijing: Petroleum Industry Press(2005), p.34~44 (In Chinese).

[9] Liangguo, D., Zaitian, M., et al., A staggered-grid high-order difference method of one-order elastic wave equation. Chinese Journal of Geophysics(2000), p.411~419 (In Chinese).

DOI: 10.1002/cjg2.107

[10] Berenger, J. P., A pergectly matched layer for the absorption of electromagnetic waves. Journal of Computational Physics(1994), p.185~200.

DOI: 10.1006/jcph.1994.1159

[11] Peng, G., Bingshou, H. and Min, G., Acoustic equation pre-stack reverse-time migration imaging condition based on Poynting vector. Journal of China Coal Society(2011), p.1290~1295 (In Chinese).