摘要
潍北凹陷下第三系孔店组沉积中砂砾岩体较为发育,由于地震资料质量较差,砂砾岩体的剖面特征及平面分布一直得不到较好的落实。从原始地震记录人手,分别进行了时频分析技术及均方根振幅(能量)技术处理,获得了相应的时频分析剖面及均方根振幅剖面。由时频特征确定了地震旋回体的存在,旋回体的横向变化揭示了砂砾岩体沉积环境的规律。均方根剖面能量团的变化反映了砂砾岩体的空间分布范围,揭示了研究区砂砾岩体沉积期多水系、多物源、纵向上多期叠置的沉积特征。
Glutenite units are well developed in the lower Tertiary Kongdian Formation in Weibei depression. The characters of glutenite unit and its extent are yet to be determined because of the poor quality of seismic data. We implemented time-frequency analysis and root-mean-square amplitude processing on raw data. The existence of seismic cycle bodies was determined from time-frequency characters. Its lateral variations revealed the sedimentary environment that the glutenite unit developed. The changes of the energy heaps in the root-mean-square amplitude reflected the spatial distribution of the glutenite unit and the depositional characters of multiple water systems, multiple material sources, and vertical superimposes at multiple depositional stages in target region.
出处
《石油物探》
EI
CSCD
2004年第4期341-344,共4页
Geophysical Prospecting For Petroleum
关键词
潍北凹陷
砂砾岩体
层序地震学
旋回体
均方根振幅
时频分析
断层
地球物理特征
Weibei depression
Kongdian formation
glutenite unit
section channel-fan system
sequence seismology
time-frequency analysis
cycle body
root-mean-square amplitude
