基于稀疏约束反演谱分解的缝洞储层叠后数据去噪应用效果分析

发布时间：2018-04-27 16:09

本文选题：去噪 + 稀疏约束反演谱分解　；参考：《石油物探》2017年05期

【摘要】：高质量的地震剖面对碳酸盐岩缝洞储层的流体识别、储量预测具有重要作用,因此对叠后地震数据进行去噪处理很有必要。为此,分析研究了基于稀疏约束反演谱分解的去噪方法在碳酸盐岩缝洞储层叠后地震数据中的应用效果。首先介绍了该方法的基本原理,然后分别将该方法用于数值模拟数据、物理模拟数据以及实际地震数据的处理,并分析去噪效果。在数值模拟测试中,将该方法与小波阈值去噪法的处理结果进行了比较,表明该方法具有较好的去噪性能和保幅性。物理模拟测试以及实际资料的处理结果均表明,该方法可以较好的压制碳酸盐岩缝洞储层叠后地震数据中的随机噪声和偏移噪声,使地震剖面中碳酸盐岩孔洞的弱反射特征得到突显,提高了地震数据处理成果的质量,为后续的定量解释奠定了良好的基础。
[Abstract]:The high quality seismic profile plays an important role in the fluid identification and reserves prediction of carbonate fracture-cavity reservoir, so it is necessary to de-noising the post-stack seismic data. For this reason, the effect of de-noising method based on sparse constrained inversion spectral decomposition in post-stack seismic data of carbonate fractures and caverns is analyzed and studied. The basic principle of the method is introduced, and then the method is applied to the processing of numerical simulation data, physical simulation data and actual seismic data, respectively, and the effect of de-noising is analyzed. The numerical simulation results show that the proposed method has better denoising performance and amplitude preserving performance than the wavelet threshold denoising method. The results of physical simulation test and actual data processing show that the proposed method can suppress random noise and migration noise in seismic data of carbonate fractures and caverns after stacking. The weak reflection characteristics of carbonate cavities in seismic profiles are highlighted, and the quality of seismic data processing results is improved, which lays a good foundation for subsequent quantitative interpretation.
【作者单位】：中国地震局地球物理勘探中心;中国石油大学(北京)油气资源与探测国家重点实验室;中国石油大学(北京)CNPC物探重点实验室;
【基金】：国家科技重大专项(2011ZX05007-006)项目资助~~
【分类号】：P631.44

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