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    渤中坳陷超压-构造活动联控型流体流动与油气快速成藏

    郝芳 蔡东升 邹华耀 方勇 曾治平

    郝芳, 蔡东升, 邹华耀, 方勇, 曾治平, 2004. 渤中坳陷超压-构造活动联控型流体流动与油气快速成藏. 地球科学, 29(5): 518-524.
    引用本文: 郝芳, 蔡东升, 邹华耀, 方勇, 曾治平, 2004. 渤中坳陷超压-构造活动联控型流体流动与油气快速成藏. 地球科学, 29(5): 518-524.
    HAO Fang, CAI Dong-sheng, ZOU Hua-yao, FANG Yong, CENG Zhi-ping, 2004. Overpressure-Tectonic Activity Controlled Fluid Flow and Rapid Petroleum Accumulation in Bozhong Depression, Bohai Bay Basin. Earth Science, 29(5): 518-524.
    Citation: HAO Fang, CAI Dong-sheng, ZOU Hua-yao, FANG Yong, CENG Zhi-ping, 2004. Overpressure-Tectonic Activity Controlled Fluid Flow and Rapid Petroleum Accumulation in Bozhong Depression, Bohai Bay Basin. Earth Science, 29(5): 518-524.

    渤中坳陷超压-构造活动联控型流体流动与油气快速成藏

    基金项目: 

    国家自然科学基金重点项目 40238059

    国家杰出青年基金项目 40125008

    教育部重大科技项目 10419

    详细信息
      作者简介:

      郝芳(1964-), 男, 长江学者奖励计划特聘教授, 博士生导师, 主要从事石油地质研究.E-mail:haofang@cug.edu.cn

    • 中图分类号: P618.13

    Overpressure-Tectonic Activity Controlled Fluid Flow and Rapid Petroleum Accumulation in Bozhong Depression, Bohai Bay Basin

    • 摘要: 渤中坳陷是东营组沉积期及其之后渤海湾盆地沉降-沉积速率最高的地区, 亦是晚期断裂活动最强烈的地区.较高的沉降-沉积速率产生了重要的成藏物质效应: (1) 持续的较快速沉降-沉积使东营组发育较深湖-深湖相泥岩并成熟, 从而使渤中坳陷发育沙河街组和东营组2套有效源岩; (2) 较高的沉降-沉积速率引起的压实不均衡及伴生的源岩快速生烃引起较强的超压, 超压对有机质热演化的抑制作用使沙河街组源岩生、排烃滞后, 从而使沙河街组和东营组在晚期同时保持在较有利的生、排油阶段, 这是渤中坳陷油气资源丰富和油气晚期快速成藏的物质基础.较强的超压和强烈的断裂活动决定了超压-构造活动联控型流体流动, 进而决定了油气幕式快速成藏过程和油气分布: 油气主要富集于新近系, 新构造运动控制油气分布

       

    • 图  1  渤海湾盆地主要构造单元沉降速率的比较

      (据中海石油研究中心勘探研究部资料编绘)

      Fig.  1.  Comparison of the subsidence rates for different sub-units of the Bohai Bay basin

      图  2  渤海湾盆地不同地区地层厚度和断裂发育特征的比较

      (龚再升提供)

      Fig.  2.  Cross-section showing the difference in stratum thickness and fault features in different sub-units of the Bohai Bay basin

      图  3  渤中坳陷CFD18-2E-1井有机质成熟度和粘土矿物演化剖面

      Fig.  3.  Organic matter maturation and clay mineral transformation profiles for Well CFD18-2E-1, Bozhong depression

      图  4  渤中坳陷PL7-1-1井地层温度和压力剖面

      Fig.  4.  Temperature and pressure profiles for Well PL7-1-1, Bozhong depression

      图  5  断裂带压力的积累、断裂开启和流体释放过程

      Fig.  5.  Schematic diagram showing the processes of the buildup overpressure, opening of the faults and release of overpressure fluid along a fault

      图  6  随张应力增大/构造活动增强, 断裂门限开启压力(pTFO) 的变化

      T.断裂带的抗张强度; σ3.构造松弛状态(应力完全由上覆地层负载产生的理想状态) 下的最小水平应力; ph.静水压力

      Fig.  6.  Variation of the threshold fluid pressure needed for fault opening with increasing tensile stress/strength of tectonic activities

      图  7  渤中坳陷QHD34-2-1井地层埋藏史、热史及储层流体包裹体均一温度分布

      Fig.  7.  Burial and thermal histories and homogenization temperatures for fluid inclusions from reservoir of Guantao Formation in Well QHD34-2-1

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    • 收稿日期:  2004-06-12
    • 刊出日期:  2004-09-25

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