【摘要】 引入归一化处理方案改进希尔伯特—黄变换(HHT),可使通过HHT获得的瞬时属性更能体现信号的本质变化特征。文中首先介绍了改进的HHT法的基本原理和分解过程,在此基础上计算地震信号的"三瞬"参数;其次,分析对比了改进HHT法、常规HHT法重构的瞬时振幅和从原始信号提取的瞬时振幅,得知改进HHT法重构的瞬时振幅对油层反应最敏感;然后,利用改进HHT法从春光油田实际三维叠后地震数据中提取瞬时振幅属性,该属性值的纵横向分辨率更高,可更清晰地刻画岩性油藏边界,且与研究区已知钻井、测井、试气等资料相吻合。因此,本文的改进HHT法能更有效地体现岩性油藏储层变化特征。更多还原

【Abstract】 We propose in the paper lithologic reservoir identification based on the improved Hilbert-Huang transform(HHT).Seismic instantaneous attributes obtained by the improved HHT reflect better seismic signal characteristics.In this paper,we first introduce the normalized processing to HHT,and its basic principles and decomposition;based on which,we calculate"three instantaneous"parameters of seismic signals.Then we analyze the instantaneous amplitudes reconstructed by HHT,the improved HHT,and original seismic signal respectively.The comparison of these three results shows that instantaneous amplitude reconstructed by the improved HHT is most sensitive to reservoirs.Finally we apply the improved HHT approach to field data in Chunguang Oilfield,and extract higher-resolution instantaneous amplitude attribute.This attribute delineates clearly lithologic reservoir boundaries which coincide with the drilling data and logging data.Therefore we believe that the proposed approach in this paper can more effectively describe lithologic reservoirs.更多还原