Lithologic Reservoirs >

2011 , Vol. 23 >Issue 6: 93 - 96

DOI: https://doi.org/10.3969/j.issn.1673-8926.2011.06.017

Three-parameter AVO inversion method based on modified Cauchy distribution

  • KANG Yuanyuan ,
  • SHAO Xianjie ,
  • SHI Lei ,
  • SHAN Yu ,
  • YU Hang
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  • Research Institute of Petroleum Exploration & Development-Northwest， PetroChina， Lanzhou 730020， China

Online published: 2011-12-20

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Abstract

Three-parameter AVOwaveforminversion can be used to estimate P-wave velocity reflectivity, S-wave velocity reflectivity and density reflectivity simultaneously. But the method is often ill posed and difficult to get a high resolution result. Based on Bayesian procedure, combined with seismic deconvolution frame, a priori constrained method based on modified Cauchy distribution is proposed. This method has a strong ability of antinoise. It can improve the stability of inversion, recover the sparsity of reflectivity sequence very well, protect information of weak reflection body excellently, and offer a result with high resolution. The simulation test shows that inversion parameters are almost perfectly retrieved quickly.

Key words： coalbed methane; perspectives; ranking; comprehensive evaluation

Cite this article

KANG Yuanyuan , SHAO Xianjie , SHI Lei , SHAN Yu , YU Hang . Three-parameter AVO inversion method based on modified Cauchy distribution[J]. Lithologic Reservoirs, 2011 , 23(6) : 93 -96 . DOI: 10.3969/j.issn.1673-8926.2011.06.017

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