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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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基于正交匹配追踪算法的叠前地震反演方法
Keywords: 正交匹配追踪,叠前地震反演,稀疏约束,模型约束,块化地层
Abstract:
？为了给地质解释提供更为有利的反演数据,本文提出一种基于正交匹配追踪算法的叠前稀疏反演方法.采用正交匹配追踪算法先搜索稀疏的反射系数位置再计算大小,利用l0范数对反射系数的稀疏性进行约束,构建基于正交匹配追踪算法的叠前地震反演目标函数,并加入模型约束以增强反演的稳定性.由于l0范数具有较强的稀疏性,反演结果界面块化,地层界面清晰.反演得到的反射系数可通过积分的方式转化为地层弹性信息.模型测试表明该方法稳定可靠,抗噪能力强.实际地震数据反演的井旁道与测井资料匹配较好,与常规反演方法相比,提升了反演结果对地层的分辨能力.
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