吉林大学学报(地球科学版) ›› 2018, Vol. 48 ›› Issue (6): 1876-1888.doi: 10.13278/j.cnki.jjuese.20170313
• 地球探测与信息技术 • 上一篇
王祝文, 徐方慧, 刘菁华, 宁琴琴, 于洋
Wang Zhuwen, Xu Fanghui, Liu Jinghua, Ning Qinqin, Yu Yang
摘要: 为了有效地识别和评价裂缝性地层,对辽河盆地东部凹陷地区含气孔、裂隙地层的单极子阵列声波测井数据进行了斯通利波波场分离(中值滤波)和希尔伯特黄变换(HHT)。研究表明:裂隙和油气通常会使斯通利波的能量衰减(主要发生在高频)、主频下降和到时滞后,这三者具有相关性;裂隙会使反射斯通利波能量增强,反射系数变大;高频和低频斯通利波的比值简称为能量比,能量比接近零时对应渗透性裂隙地层,能量比较小但有一定数值时可能对应渗透性孔隙地层;固有模态函数保留了原始数据固有的物理特性,HHT幅值谱从时间和频率两个方面突出了阵列声波的动力特性。实测数据的傅里叶变换和HHT均能对储层性质进行一定的评价,HHT放大了阵列声波信号对于地层性质的敏感程度,易于研究的分析对比。
中图分类号:
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