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热带海洋学报

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微观孔隙结构对珊瑚礁灰岩纵波波速的影响规律研究

唐一麟1, 2, 3, 余家成2, 3, 4, 田雨杭2, 3, 陈忠2, 3, 颜文2, 3, 4   

  1. 1. 海南省海洋地质资源与环境重点实验室, 海南 海口 570206;

    2. 热带海洋环境与岛礁生态全国重点实验室(中国科学院南海海洋研究所), 广东 广州 511458;

    3. 中国科学院南海海洋研究所边缘海与大洋地质实验室, 广东 广州 511458;

    4. 中国科学院大学, 北京 100049



  • 收稿日期:2026-01-28 修回日期:2026-04-14 接受日期:2026-04-14
  • 通讯作者: 田雨杭
  • 基金资助:

    海南省海洋地质资源与环境重点实验室开放基金项目(24-HNHYDZZYHJKF047); 国家重点研发计划项目(2021-06); 广东省自然科学基金项目(2025A1515010958)

Study on the influence of microscopic pore structure on P-wave velocity of coral reef limestone

TANG Yilin1, 2, 3, YU Jiacheng2, 3, 4, TIAN Yuhang2, 3, CHEN Zhong2, 3, YAN Wen2, 3, 4   

  1. 1. Hainan Key Laboratory of Marine Geological Resources and Environment, Haikou 570206, China;

    2. State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 511458, China;

    3. Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 511458, China;

    4. University of Chinese Academy of Sciences, Beijing 100049, China



  • Received:2026-01-28 Revised:2026-04-14 Accepted:2026-04-14
  • Supported by:
    Hainan Marine Geological Resources and Environment Key Laboratory Open Fund(24-HNHYDZZYHJKF047); National Key Research and Development Program of China(2021-06); Natural Science Foundation of Guangdong Province(2025A1515010958)

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摘要： 珊瑚礁灰岩的孔隙结构、孔隙类型和特定矿物组成导致其与普通灰岩和其它岩石具有不同的声学特征, 过去开展礁灰岩微观孔隙结构特征和纵波波速影响相关研究开展较少。本文选定南沙岛礁钻孔样品, 进行岩心地层横向纵波波速、孔隙度和孔隙结构测试和计算, 结合三维数字岩心孔隙模型, 研究微观孔隙结构对珊瑚礁灰岩横向纵波波速影响。结果显示高分辨率横向纵波波速变化范围为4441~6525 m·s-1, 孔隙度变化范围0.40~31.46%, 密度变化范围为2.07~2.72g·cm-3 , 孔隙形状以不等轴孔隙结构为主, 孔隙类型以晶间溶孔为主, 纵波声速变化与孔隙度呈负相关。研究表明南沙珊瑚礁岩心结构致密, 具有良好的地质稳定性。

关键词: 珊瑚礁灰岩, 微观孔隙结构, 孔隙度, 纵波波速, 南海

Abstract: The pore structure, pore types, and specific mineral composition of coral reef limestone endow it with distinct acoustic characteristics compared to conventional limestone and other rocks. Previously, limited research has been conducted on the microscopic pore structure characteristics of reef limestone and their impact on P-wave velocity. In this study, borehole core samples from the Nansha Islands reefs were selected to measure and calculate the horizontal P-wave velocity, porosity, and pore structure. Combined with 3D digital core pore models, the influence of microscopic pore structure on the horizontal P-wave velocity of coral reef limestone was systematically investigated. The results indicate that the high-resolution horizontal P-wave velocity ranges from 4,441 m·s⁻¹ to 6,525 m·s⁻¹, and the porosity ranges from 0.40% to 31.46%, the density ranges from 2.07 g·cm-3 to 2.72g·cm-3. The pore shape is dominated by an-equant pore structures, and the main pore type is inter-crystalline dissolution pores. Furthermore, the P-wave velocity exhibits a negative correlation with porosity. This study demonstrates that the Nansha coral reef cores possess a compact structure and exhibit good geological stability.

Key words: coral reef limestone, microscopic pore structure, porosity, P-wave velocity, South China Sea