【摘要】 对辽西凹陷欢喜岭地区沙河街组进行了深入细致的层序划分以寻找岩性地层圈闭,由于地震反射特征在地震资料上表现不明显,层序界面识别困难,应用经典层序地层学的原理和方法,综合运用欢喜岭地区地震和测井资料,借助地震时频分析技术和测井连续小波变换来确定层序界面,建立了该区高精度层序地层格架。研究表明,地震时频分析技术和测井小波变换进行层序旋回划分是较为可靠和实用的。沙河街组共发育有5个具有等时意义的层序界面,可划分为6个三级层序。更多还原

【Abstract】 Sequence division of Shahejie Formation is very significant for searching for lithologic and stratigraphic traps in Huanxiling area,western Liaohe Sag.However,the seismic reflection characteristic of seismic data shows indistinctly,identification of sequence boundary is difficult.By utilizing the principle and method of classic sequence stratigraphy and studying seismic and well logging data,in virtue of seismic time- frequency analysis and logging continuous wavelet transformation,sequence boundary is confirmed.Study indicates seismic time-frequency analysis and logging continuous wavelet transformation is relatively credible and practical.Shahejie Formation in Liaohe western Sag develops 5 isochronic sequence boundaries and can be divided into six level-three sequences.更多还原