王小江, 李培, 张凯, 荣立新, 姜春香, 李金丽. 永定河流域新生代地层岩相地震识别[J]. 地质通报, 2023, 42(2-3): 332-342. DOI: 10.12097/j.issn.1671-2552.2023.2-3.012
    引用本文: 王小江, 李培, 张凯, 荣立新, 姜春香, 李金丽. 永定河流域新生代地层岩相地震识别[J]. 地质通报, 2023, 42(2-3): 332-342. DOI: 10.12097/j.issn.1671-2552.2023.2-3.012
    WANG Xiaojiang, LI Pei, ZHANG Kai, RONG Lixin, JIANG Chunxiang, LI Jinli. Seismic identification of lithofacies of Cenozoic stratigraphic in the Yongding River Basin[J]. Geological Bulletin of China, 2023, 42(2-3): 332-342. DOI: 10.12097/j.issn.1671-2552.2023.2-3.012
    Citation: WANG Xiaojiang, LI Pei, ZHANG Kai, RONG Lixin, JIANG Chunxiang, LI Jinli. Seismic identification of lithofacies of Cenozoic stratigraphic in the Yongding River Basin[J]. Geological Bulletin of China, 2023, 42(2-3): 332-342. DOI: 10.12097/j.issn.1671-2552.2023.2-3.012

    永定河流域新生代地层岩相地震识别

    Seismic identification of lithofacies of Cenozoic stratigraphic in the Yongding River Basin

    • 摘要: 为支撑永定河流域重要经济区新时期多要素基础地质调查工作,开展了高分辨率地震探测试验。在地震地层学和地震沉积学原理指导下,运用井震标定、波阻抗反演和90°相位法等关键技术,进行岩心、测井和地震特征对比,对测区的新生界进行了精细地质构造、地层、岩相等识别分析。研究表明,波阻抗反演和90°相位转换具有良好的测井、岩性标定效果,不同相带内沉积物在波阻抗剖面上具有明显的特征,波阻抗值的高低和岩性的粗细具有较好的对应关系,对河道、积水洼地、三角洲等的叠置、组合关系刻画精细,而90°相位剖面波峰和中高波阻抗一致,能够简单快速地识别河道砂体展布。

       

      Abstract: In order to support the multi-factors basic geological survey in the important economic zone of the Yongding River Basin in the new period, we developed high-resolution seismic detection test.Under the guidance of seismic stratigraphy and seismic sedimentology, we used some key techniques such as well-seismic calibrat, wave impedance inversion and 90° phase method to compare the characteristics of core, well logging and seismic wave field.The Cenozoic in the survey area has been identified and analyzed in terms of fine geological structure, stratum and lithofacies.The research results show that the wave impedance inversion and 90° phase transformation have good effect on logging and lithology calibration, the sediments in different facies zones have obvious characteristics on the wave impedance section, and the wave impedance value has a good relationship with the lithology grain size, the superimposition and combination of river course, water-logged depression and delta are described in detail.The wave crest of 90° phase section is consistent with the mid-high impedance, it can identify the distribution of channel sand body simply and quickly.

       

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