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细粒岩天文旋回识别及在精细地层划分上的应用-以辽河西部凹陷雷家地区沙四段为例

李阳

李阳. 细粒岩天文旋回识别及在精细地层划分上的应用-以辽河西部凹陷雷家地区沙四段为例[J]. 沉积学报. doi: 10.14027/j.issn.1000-0550.2023.133
引用本文: 李阳. 细粒岩天文旋回识别及在精细地层划分上的应用-以辽河西部凹陷雷家地区沙四段为例[J]. 沉积学报. doi: 10.14027/j.issn.1000-0550.2023.133
Identification of astronomical cycles in mixed fine-grained sedimentary rocks and its application in fine stratigraphic division and correlation - a case study of the fourth member of Shahejie Formation in the Leijia area, the western sag of the Liaohe Depression[J]. Acta Sedimentologica Sinica. doi: 10.14027/j.issn.1000-0550.2023.133
Citation: Identification of astronomical cycles in mixed fine-grained sedimentary rocks and its application in fine stratigraphic division and correlation - a case study of the fourth member of Shahejie Formation in the Leijia area, the western sag of the Liaohe Depression[J]. Acta Sedimentologica Sinica. doi: 10.14027/j.issn.1000-0550.2023.133

细粒岩天文旋回识别及在精细地层划分上的应用-以辽河西部凹陷雷家地区沙四段为例

doi: 10.14027/j.issn.1000-0550.2023.133

Identification of astronomical cycles in mixed fine-grained sedimentary rocks and its application in fine stratigraphic division and correlation - a case study of the fourth member of Shahejie Formation in the Leijia area, the western sag of the Liaohe Depression

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出版历程
  • 收稿日期:  2023-06-26
  • 网络出版日期:  2024-01-08

目录

    细粒岩天文旋回识别及在精细地层划分上的应用-以辽河西部凹陷雷家地区沙四段为例

    doi: 10.14027/j.issn.1000-0550.2023.133

    摘要: 【目的】渤海湾盆地辽河坳陷西部凹陷雷家地区沙四段发育以粘土、长英质、碳酸盐及方沸石矿物混合的湖相细粒沉积岩,为该区油气赋存的主要载体,由于混合细粒岩成分复杂且横向变化快,导致储层非均质性强,为优质储层预测带来一定困难。【方法】以西部凹陷雷家地区雷15井、雷14井和雷61井为例,基于时间序列分析方法、高精度碳酸盐U-Pb定年及自然伽马测井数据对沙四段混合细粒岩进行旋回地层学分析。【结果】1)以相关系数法估算雷15井、雷14井和雷61井的最佳沉积速率,发现最佳沉积速率依次增大,分别为10.57 cm/kyr、11.4 cm/kyr和13.93 cm/kyr;2)对古气候替代指标(自然伽马)进行频谱分析,与标准ETP曲线(偏心率、斜率、岁差合成曲线)数据频谱分析结果进行对比,识别雷15井、雷14井和雷61井混合细粒岩中的天文旋回信号,并利用405 kyr长偏心率进行天文调谐,以雷14井2766.61m处年龄43.4±1.7 Ma为锚点,建立绝对天文年代标尺;3)沙四段中识别出6个405 kyr长偏心率周期,~17个~129 kyr短偏心率周期,结合地球轨道周期与高频层序之间的联系,建立偏心率尺度的精细地层划分对比格架。【结论】通过对雷家地区沙四段开展旋回地层学研究,有效识别沙四段中天文旋回信号,以量化方式建立具备时间属性的精细地层划分对比格架,对该区油气进一步勘探具重要指导作用,并且拓宽旋回地层学在渤海湾盆地的适用性。

    English Abstract

    李阳. 细粒岩天文旋回识别及在精细地层划分上的应用-以辽河西部凹陷雷家地区沙四段为例[J]. 沉积学报. doi: 10.14027/j.issn.1000-0550.2023.133
    引用本文: 李阳. 细粒岩天文旋回识别及在精细地层划分上的应用-以辽河西部凹陷雷家地区沙四段为例[J]. 沉积学报. doi: 10.14027/j.issn.1000-0550.2023.133
    Identification of astronomical cycles in mixed fine-grained sedimentary rocks and its application in fine stratigraphic division and correlation - a case study of the fourth member of Shahejie Formation in the Leijia area, the western sag of the Liaohe Depression[J]. Acta Sedimentologica Sinica. doi: 10.14027/j.issn.1000-0550.2023.133
    Citation: Identification of astronomical cycles in mixed fine-grained sedimentary rocks and its application in fine stratigraphic division and correlation - a case study of the fourth member of Shahejie Formation in the Leijia area, the western sag of the Liaohe Depression[J]. Acta Sedimentologica Sinica. doi: 10.14027/j.issn.1000-0550.2023.133

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