›› 2009, Vol. 30 ›› Issue (12): 3710-3714.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Improvement of Whitcombe’s extended elastic impedance formula

YUAN Chun-fang1, 2 PENG Su-ping1, 2, LÜ Yan1, WANG Xiao-wei1, CAI Li-wen1   

  1. 1. School of Geosciences and Surveying Engineering, China University of Mining & Technology, Beijing 100083, China; 2. State Key Laboratory of Coal Resources and Mine Safety, China University of Mining & Technology, Beijing 100083, China
  • Received:2009-06-19 Online:2009-12-10 Published:2010-01-18

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Abstract:

When elastic impedance is used in practice, it needs to estimate the incidence angle, (whereθ is the incident angle) may exceed unity because of the existence of errors, which makes elastic impedance inversion extremely unstable. Used substitute for (Whitcombe et al., 2002) derived the extended elastic impedance, improved the stability of elastic impedance inversion. Based on the three term Zoeppritz equation (Aki and Richards, 1980), this article improves Whitcombe's extended elastic impedance. The improved extended elastic impedance increases the computational precision.

Key words: acoustic impedance, inversion, elastic impedance, extended elastic impedance

CLC Number: 

  • TU 235.1
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