分频技术在塔中地区地震储层边界刻画中的应用  

Spectral Decomposition Technology and Its Application to Improving Resolution of Frequency Spectrum

作　　者：林年添[1,2] 孙剑[1,2] 汤健健[3] 王晓东[1,2] 李桂花[1,2] 

机构地区：[1]山东科技大学山东省沉积成矿作用与沉积矿产重点实验室,山东青岛266590 [2]山东科技大学地质科学与工程学院,山东青岛266590 [3]浙江省第九地质大队,浙江湖州313000

出　　处：《山东科技大学学报（自然科学版）》2012年第4期18-25,共8页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：国家自然科学基金项目(41174098,40904009);国家高技术发展计划(“863”计划)项目(2012AA061202)

摘　　要：为了减少甚至排除时间域内不同频率成份的相互干扰,将基于短时窗离散傅氏变换或基于Z变换的最大熵谱方法的分频技术应用于塔中某区地震属性分析中,以获取高于传统频谱分析分辨率的解释结果,提高地震储层边界的刻画精度。实测数据分析表明,由分频算法所得到的目的层时-频切片相比于传统的地震属性,其频带界限(对应于能量体的分布或调谐厚度的变化)更清晰,更有利于地震储层的边界刻画及分布预测。In order to reduce or even eliminate the mutual interference of different frequency in the time domain, the spectral decomposition technology based on windowed shorted time Fourier transform or maximum entropy method of Z-transform can be applied to the seismic attribute analysis in the research area. By using this technique, the higher resolution than the result from the tradition spectral analysis is obtained and the seismic reservoir prediction effect is improved. The time-frequency slice of the target area acquired by the time frequency algorithm shows more details, and it is easier to distinguish the boundary of the frequency band corresponding to the energy map or turning thickness, therefore, it is more beneficial to predict the reservoir and outline its distribution, compared to conventional seismic attributes.

关 键 词：地震属性 分频技术 提高分辨率 地震储层 预测 

分 类 号：P631.4[天文地球—地质矿产勘探]