贝叶斯全频信息同时反演在鄂尔多斯盆地碳酸盐岩储层预测中的应用

鄂尔多斯盆地西侧奥陶系碳酸盐岩储层的地质、地球物理特征表现为：储层厚度较小，非均质性强、地震资料主频低，常规反演结果分辨率较低，且石炭系底煤层反射能量很强，完全淹没了溶洞反射，不能满足该区碳酸盐岩储层描述的精度要求。为此，本文提出了贝叶斯地震数据全频信息同时反演方法，首先利用谱分解技术将地震数据分解为不同频带的数据，然后在贝叶斯反演框架下，将地震数据的高、中、低频信息同时进行反演，从而充分利用了地震优势频带之外的信息（特别是高频信息），反演结果能够清晰地反映溶洞位置和横向展布情况，可为该区奥陶系碳酸盐岩储层表征提供有力的技术支撑。

Bayesian full frequency simultaneous inversion for carbonate reservoir in Erdos Basin

Ordovician carbonate reservoirs in western Erdos Basin are characterized by their thinness, strong heterogeneity, and strong reflection from Carboniferous layer. The dominant frequency of seismic data is rather low, resulting in the low resolution of conventional inversions. To solve this problem in carbonate reservoir characterization, we propose in the paper a full frequency simultaneous seismic inversion method. First we decompose seismic data into different frequency bands. Then we invert simultaneously the low, middle and high frequency seismic data based on Bayesian inversion theory. Since the full frequency information, especially high frequency information, is fully utilized, the inversion results can clearly delineate the cavity heterogeneity. Therefore, this inversion method is favorable for the carbonate reservoir characterization.