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    利用多道地震反射数据探测神狐海域渗漏型水合物

    徐华宁 邢涛 王家生 李丽青 梁蓓雯 舒虎 张明

    徐华宁, 邢涛, 王家生, 李丽青, 梁蓓雯, 舒虎, 张明, 2012. 利用多道地震反射数据探测神狐海域渗漏型水合物. 地球科学, 37(S1): 195-202. doi: 10.3799/dqkx.2012.S1.020
    引用本文: 徐华宁, 邢涛, 王家生, 李丽青, 梁蓓雯, 舒虎, 张明, 2012. 利用多道地震反射数据探测神狐海域渗漏型水合物. 地球科学, 37(S1): 195-202. doi: 10.3799/dqkx.2012.S1.020
    XU Hua-ning, XING Tao, WANG Jia-sheng, LI Li-qing, LIANG Bei-wen, SHU Hu, ZHANG Ming, 2012. Detecting Seepage Hydrate Reservoir Using Multi-Channel Seismic Reflecting Data in Shenhu Area. Earth Science, 37(S1): 195-202. doi: 10.3799/dqkx.2012.S1.020
    Citation: XU Hua-ning, XING Tao, WANG Jia-sheng, LI Li-qing, LIANG Bei-wen, SHU Hu, ZHANG Ming, 2012. Detecting Seepage Hydrate Reservoir Using Multi-Channel Seismic Reflecting Data in Shenhu Area. Earth Science, 37(S1): 195-202. doi: 10.3799/dqkx.2012.S1.020

    利用多道地震反射数据探测神狐海域渗漏型水合物

    doi: 10.3799/dqkx.2012.S1.020
    基金项目: 

    国家重点基础研究计划973项目 2009CB219500

    国家重点基础研究计划973项目 2011CB808805

    国家自然科学基金项目 41172102

    国家高技术研究发展计划863项目 2006AA09A202

    详细信息
      作者简介:

      徐华宁(1973-),男,博士研究生,教授级高级工程师,主要从事天然气水合物成像与反演研究.E-mail: xuhuaning1973@163.com

    • 中图分类号: P3; P67

    Detecting Seepage Hydrate Reservoir Using Multi-Channel Seismic Reflecting Data in Shenhu Area

    • 摘要: 以海底为基准,将高分辨率多道地震反射数据分离为两个独立部分,并分别对水体和地层成像.水体的成像结果显示了两个明显形如羽状流的异常,与之对应地层的地震反射剖面显示在海底处出现海底下陷、气体溢出口等与甲烷渗漏相关的地形地貌特征,并在海底之下不足100 m的深度位置出现一个指示天然气水合物存在的明显的似海底反射.详尽的速度分析发现, 似海底反射和溢出口之下沉积地层的声波速度明显下降, 并且地震反射特征也与地层含气有关.通过对所有信息综合分析,推测这些地球物理异常和特殊地形地貌特征(如羽状流、声波速度反转、溢出口、海底下陷、浅部BSR等)很可能是甲烷气体沿运移通道进入近海底沉积物中形成天然气水合物或溢出至海水中所致.研究结果表明,多道高分辨率地震反射数据具有探测渗漏型天然气水合物的能力.

       

    • 图  1  研究区地形地貌

      Site1、Site2、Site3为钻探取样获得水合物样品位置;直线为本文研究的多道地震测线;P1、P2、P3和P4为异常点位置

      Fig.  1.  Geomorphology of study area

      图  2  多道地震数据成像

      a.水体反射数据成像;b.地层反射数据成像;P1、P2、P3、P4与图 1中的标注对应

      Fig.  2.  Imaging section of multi-channel seismic reflecting data

      图  3  P1-P4位置成像剖面的局部放大

      Fig.  3.  Parts enlargement of imaging section at P1 to P4

      图  4  P4位置处的BSR反射特征

      Fig.  4.  Reflecting characteristics of BSR lying below site P4

      图  5  P1-P4处的均方根速度特征

      Fig.  5.  Root-mean-square velocity at P1 to P4

      图  6  速度垂向变化归一化结果与地震反射剖面叠合(蓝色区域表明速度垂向反转)

      蓝色区域表示速度出现反转,可能代表游离气聚集的区域;黄色区域表示速度随深度是增加

      Fig.  6.  Normalized vertical gradient of RMS velocity field superposed on seismic reflecting section

      图  7  研究测线地震反射特征

      Fig.  7.  Seismic reflecting characteristics of imaging section

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    出版历程
    • 收稿日期:  2011-11-25
    • 网络出版日期:  2021-11-15
    • 刊出日期:  2012-05-01

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