摘要
常规的高分辨率处理方法假设反射系数序列服从高斯白噪的统计特征。利用实际测井数据得到的反射系数进行统计分析,得出了反射系数非高斯分布且频谱偏蓝的结论,并把这一结论运用到混合相位子波提取和反褶积处理中。为避免相位卷绕和累计误差对相位估算精度的影响,在对高阶累积量混合相位子波的提取方法进行系统分析的基础上,提出了基于多路径平均双谱法的混合相位子波估算方法。实际地震数据的试处理表明:该方法能有效改善地震记录的分辨率,增强地震记录反映薄层内幕的能力。
The conventional seismic data process methods for high resolution assume that reflection coefficient series are accordant with Gaussian Gauss White Noise. Through the statistical analysis of reflection coefficients obtained from the actual logging data, it is concluded that the reflection coefficients are non-Gaussian distribution and their spectrums tend to blue, which can be applied to extract mixed phase wavelet and carry out deconvolution. Based on systematic analysis of the method of high order cumulant mixed phase wavelet extraction, and in order to avoid the influence of phase winding and accumulated error on phase estimation accuracy, the method of multi path average bispectrum was proposed. The actual seismic data processing result shows that this method can improve the resolution of seismic records effectively and enhance its ability of detecting thin layer.
出处
《岩性油气藏》
CSCD
2013年第3期82-86,共5页
Lithologic Reservoirs
基金
大型油气田及煤层气开发国家重大科技专项"基于GeoEast的多波地震
测井和地质信息的裂缝储层综合分析软件集成"子课题(编号:2011ZX05019-008-005)资助
关键词
统计特征
非高斯分布
混合相位
有色补偿
分辨率
statistical characteristics
non-Gaussian distribution
mixed phase
colored compensation
resolution
