南海北部陆坡珠江口盆地东南海域GMGS2-09井孔隙水地球化学特征及其对天然气水合物的指示意义

赖亦君, 杨涛, 梁金强, 张光学, 苏丕波, 方允鑫. 南海北部陆坡珠江口盆地东南海域GMGS2-09井孔隙水地球化学特征及其对天然气水合物的指示意义[J]. 海洋地质与第四纪地质, 2019, 39(3): 135-142. doi: 10.16562/j.cnki.0256-1492.2018010201
引用本文: 赖亦君, 杨涛, 梁金强, 张光学, 苏丕波, 方允鑫. 南海北部陆坡珠江口盆地东南海域GMGS2-09井孔隙水地球化学特征及其对天然气水合物的指示意义[J]. 海洋地质与第四纪地质, 2019, 39(3): 135-142. doi: 10.16562/j.cnki.0256-1492.2018010201
LAI Yijun, YANG Tao, LIANG Jinqiang, ZHANG Guangxue, SU Pibo, FANG Yunxin. Geochemistry of sediment pore water from Well GMGS2-09 in the southeastern Pearl River Mouth Basin, South China Sea: An indication of gas hydrate occurrence[J]. Marine Geology & Quaternary Geology, 2019, 39(3): 135-142. doi: 10.16562/j.cnki.0256-1492.2018010201
Citation: LAI Yijun, YANG Tao, LIANG Jinqiang, ZHANG Guangxue, SU Pibo, FANG Yunxin. Geochemistry of sediment pore water from Well GMGS2-09 in the southeastern Pearl River Mouth Basin, South China Sea: An indication of gas hydrate occurrence[J]. Marine Geology & Quaternary Geology, 2019, 39(3): 135-142. doi: 10.16562/j.cnki.0256-1492.2018010201

南海北部陆坡珠江口盆地东南海域GMGS2-09井孔隙水地球化学特征及其对天然气水合物的指示意义

  • 基金项目:
    中国地质调查局组织的国家重点科学项目(GZH201200305-06-03)
详细信息
    作者简介: 赖亦君(1993—),男,硕士研究生,研究方向为天然气水合物地球化学探测
  • 中图分类号: P736.4, P618.130

  • 周立君编辑

Geochemistry of sediment pore water from Well GMGS2-09 in the southeastern Pearl River Mouth Basin, South China Sea: An indication of gas hydrate occurrence

  • 沉积物孔隙水地球化学是天然气水合物勘探与研究的重要手段。为了探究珠江口盆地东南海域GMGS2-09钻孔的沉积物孔隙水地球化学特征及其对埋藏的天然气水合物的指示意义,我们在前人的研究和认知基础上,通过测试该钻孔沉积物孔隙水的氯离子含量、氢氧同位素和阳离子组成来识别天然气水合物的赋存层位。结果表明GMGS2-09钻孔在9~17、47以及100m处存在氯离子浓度的负异常耦合氧同位素的正异常,指示相应的天然气水合物赋存,其中9~17m层位指示结果与实际取样情况完全一致。此外,采用基于水合物晶格的排盐机理推导的经验公式计算显示水合物饱和度在浅表层(17m)最高约为50%,中间以及底层约为20%。

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  • 图 1  南海北部陆坡地质图(a)和GMGS2-09站位位置(b)

    Figure 1. 

    图 2  GMGS2-09站位孔隙水阴阳离子含量随深度分布图

    Figure 2. 

    图 3  GMGS2-09站位孔隙水氢氧同位素组成随深度分布图

    Figure 3. 

    图 4  GMGS2-09站位孔隙水氯含量以及氢氧同位素相关关系

    Figure 4. 

    图 5  GMGS2-09站位孔隙水氯含量以及氧同位素随深度分布图

    Figure 5. 

    图 6  GMGS2-9站位水合物饱和度随深度分布图

    Figure 6. 

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出版历程
收稿日期:  2018-01-02
修回日期:  2018-01-18
刊出日期:  2019-06-28

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