摘要
鹿乡断陷是伊通盆地的一级构造单元,该区地层具有时代新、物源多、快速沉积等特点。常规地层划分与对比及传统层序划分问题较多,在清楚认识鹿乡断陷南部万昌组两个三级层序的基础上,利用最大熵频谱属性分析准确识别出四级层序。最大熵频谱属性分析方法具有不受取样长度限制、频谱分辨率较高的优点,可以准确地识别出最大湖泛面的位置,并且对于三级层序内部的体系域特征、旋回性有更直观的认识。
Luxiang fault depression is a first-order tectonic unit of Yitong Basin. The strata in the fault depression feature in new era, multiple source, and rapid deposition. There exist many problems in conventional stratigraphic division and correlation and traditional sequence division. Based on the clear understanding of two third-order sequences of Wanchang Formation in southern Luxiang fault depression, analyzing the attributes of maximum entropy spectrum, fourth-order sequences are identified accurately. The method has many advantages such as no limit to sampling length and higher resolution to the spectra. It may be used to accurately identify the location of maximum flooding surface. Furthermore, it provides a more intuitive understanding of the characteristics of system tract and cycling within the third-order sequence.
出处
《中国石油勘探》
CAS
2009年第4期53-56,共4页
China Petroleum Exploration
关键词
伊通盆地
鹿乡断陷
万昌组
最大熵频谱属性
米兰科维奇旋回
层序地层学
Yitong Basin
Luxiang fault depression
attribute of maximum entropy spectrum
Milankovitch cycles
sequence stratigraphy
