米兰柯维奇旋回与高频波动周期的识别

Milankovitch cycles and the recognition of high?frequency wave period

运用频谱分析方法在塔里木盆地塔中地区志留系识别出米兰柯维奇旋回 .对米氏旋回进行波动分析表明 ,高频率的 5Ma周期波波动特征能够有效地解释生、储、盖演化 .周期波表现为峰峰叠加 ,为储层发育期 ;周期波表现为谷谷叠加时 ,为盖层发育期 .高频波由波峰→波谷过渡的特征 ,刚好对应层序地层学的海进体系域→高位体系域的变化 .

Milankovitch cycles have been recognized in Silurian of Central Tarim by the method of spectral analysis.Wave process analysis on Milankovitch cycles indicate that the wave process features of 5?Ma high?frequency wave period can be used for interpreting the evolution of oil source rock,reservoir rock and caprock.Reservoir rock is well developed at the time of wave peaks superposed each other,caprock is well developed at the time of wave valleys superposed each other.There is better correspondence between the high?frequency wave process changes from wave peaks to wave valleys,and the sequencial changes from transgressive systems tracts to highstand systerms tracts.