一种基于修正Cauchy 分布的高分辨率AVO 三参数反演方法
网络出版日期: 2011-12-20
基金资助
国家“973”项目“非均质储层预测”(编号:2007CB209604)资助
Three-parameter AVO inversion method based on modified Cauchy distribution
Online published: 2011-12-20
康园园 , 邵先杰 , 石磊 , 单宇 , 于航 . 一种基于修正Cauchy 分布的高分辨率AVO 三参数反演方法[J]. 岩性油气藏, 2011 , 23(6) : 93 -96 . DOI: 10.3969/j.issn.1673-8926.2011.06.017
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
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