张坦;张昌民;瞿建华;朱锐;袁瑞;

• 1:长江大学地球科学学院

• 2:中国石油新疆油田分公司勘探开发研究院

摘要(Abstract)：

由天体轨道周期性变化引起气候改变而被记录在沉积地层中的米兰科维奇旋回,具有时间域上的等时性特征,是实现高频沉积旋回等时划分与对比的有效途径。基于米兰科维奇理论,以准噶尔盆地玛湖凹陷百口泉组地层为研究对象,对3口井自然伽马和电阻率测井曲线进行频谱分析。将测井曲线经过滤波处理后提取出的短偏心率周期99.0ka和短斜率周期40.5ka的滤波曲线,作为五级层序沉积旋回和六级层序沉积旋回的参考曲线,对百口泉组地层进行高频沉积旋回的划分与对比,建立玛湖凹陷百口泉组地层沉积旋回对比格架。结果表明:百口泉组地层保存完整的米兰科维奇沉积旋回,旋回主要由偏心率(99.0ka)和斜率(40.5ka)周期控制,偏心率和斜率周期引起的地层厚度分别为6.49~7.05和2.56~2.98m,平均沉积速率为6.76cm/ka。该研究结果为测井曲线在高频地层层序识别与划分上的应用提供新的方法,为层序地层划分研究提供参考。

关键词(KeyWords)：米兰科维奇旋回;沉积旋回;频谱分析;滤波分析;沉积速率;百口泉组;玛湖凹陷

Abstract:

Keywords:

基金项目(Foundation):国家科技重大专项(2016ZX05027-02-007);; 国家自然科学基金项目(41302096,41172106)

作者(Author):张坦;张昌民;瞿建华;朱锐;袁瑞;

Email:

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