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    异常压力环境下流体活动及其油气运移主通道分析

    解习农 刘晓峰 赵士宝 姜涛

    解习农, 刘晓峰, 赵士宝, 姜涛, 2004. 异常压力环境下流体活动及其油气运移主通道分析. 地球科学, 29(5): 589-595.
    引用本文: 解习农, 刘晓峰, 赵士宝, 姜涛, 2004. 异常压力环境下流体活动及其油气运移主通道分析. 地球科学, 29(5): 589-595.
    JIE Xi-nong, LIU Xiao-feng, ZHAO Shi-bao, JIANG Tao, 2004. Fluid Flow and Hydrocarbon Migration Pathways in Abnormally Pressured Environments. Earth Science, 29(5): 589-595.
    Citation: JIE Xi-nong, LIU Xiao-feng, ZHAO Shi-bao, JIANG Tao, 2004. Fluid Flow and Hydrocarbon Migration Pathways in Abnormally Pressured Environments. Earth Science, 29(5): 589-595.

    异常压力环境下流体活动及其油气运移主通道分析

    基金项目: 

    教育部重点基金项目 01038

    详细信息
      作者简介:

      解习农(1963-), 男, 教授, 主要从事能源地质与盆地流体的教学和科研工作.E-mail: xnxie@cug.edu.cn

    • 中图分类号: P539.2;P618.13

    Fluid Flow and Hydrocarbon Migration Pathways in Abnormally Pressured Environments

    • 摘要: 沉积盆地的油气生成、运移和成藏过程与盆地流体作用密切相关, 而异常压力环境下流体活动有其特殊性, 因而与之相关的油气运移和成藏也有其特殊性.对于异常压力体系(包括高压和低压)而言, 存在2类流体系统, 即半开放型和封闭型流体系统.前者由于封闭层的间歇开启导致流体幕式释放, 后者以封闭层内热对流作用为主.按照封闭层开启的成因机制可划分为3类, 即水力破裂或流体压裂型、断裂型、断-压双控型.封闭层的间歇开启构成异常压力环境下油气运移的主通道.这些流体活动和油气运移在海底以及盆地的浅层和深层显示不同地球物理特征, 如气苗、麻坑、气烟囱和流体底辟带等.同样, 还可以利用岩石中残留的一些标记或异常现象示踪盆地流体活动, 如流体包裹体、地层水化学、有机地球化学异常、成岩作用异常、流体场动态模拟等.这些特征和标志为流体和油气运移主通道的识别, 同时也为异常压力环境下油气勘探提供重要的依据.

       

    • 图  1  莺歌海盆地异常超压带顶部的麻坑

      Fig.  1.  Pockmarks above an overpressured zone of Yinggehai basin

      图  2  莺歌海盆地异常超压带内速度异常

      Fig.  2.  Anomalous velocity in overpressured zone of Yinggehai basin

      图  3  松辽盆地十屋断陷(a)和莺歌海盆地底辟区(b) 地层水矿化度随深度变化

      Fig.  3.  Salinity of groundwater vs. depth in the Shiwu depression of Songliao basin (a) and the diapir zones of Yinggehai basin (b)

      图  4  莺歌海盆地和松辽盆地十屋断陷地层水中Na亏损与Ca盈余之间关系, 左上插图说明不同离子浓度变化与水-岩反应类型关系(Davisson and Criss, 1996)

      Fig.  4.  Excess-deficit relations of formation water in the Yinggehai basin and the Shiwu depression of Songliao basin. Inset figure shows the relationship between fluid composition and modes of different water-rock interactions

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    • 收稿日期:  2004-05-12
    • 刊出日期:  2004-09-25

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