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塔里木盆地塔河油田逆冲背斜区奥陶系古暗河系统发育特征

张长建 蒋林 文欢 吕晶 昌琪

张长建, 蒋林, 文欢, 吕晶, 昌琪. 塔里木盆地塔河油田逆冲背斜区奥陶系古暗河系统发育特征[J]. 石油实验地质, 2024, 46(2): 333-341. doi: 10.11781/sysydz202402333
引用本文: 张长建, 蒋林, 文欢, 吕晶, 昌琪. 塔里木盆地塔河油田逆冲背斜区奥陶系古暗河系统发育特征[J]. 石油实验地质, 2024, 46(2): 333-341. doi: 10.11781/sysydz202402333
ZHANG Changjian, JIANG Lin, WEN Huan, LÜ Jing, CHANG Qi. Development characteristics of Ordovician ancient subterranean river system in thrust anticline area of Tahe Oilfield, Tarim Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2024, 46(2): 333-341. doi: 10.11781/sysydz202402333
Citation: ZHANG Changjian, JIANG Lin, WEN Huan, LÜ Jing, CHANG Qi. Development characteristics of Ordovician ancient subterranean river system in thrust anticline area of Tahe Oilfield, Tarim Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2024, 46(2): 333-341. doi: 10.11781/sysydz202402333

塔里木盆地塔河油田逆冲背斜区奥陶系古暗河系统发育特征

doi: 10.11781/sysydz202402333
基金项目: 

中国石化重大科技项目 P20042-1

详细信息
    作者简介:

    张长建(1983—),男,硕士,副研究员,从事油气地质研究。E-mail: 273419780@qq.com

    通讯作者:

    蒋林(1987—),男,硕士,副研究员,从事油气开发研究。E-mail: jianglin.xbsj@sinopec.com

  • 中图分类号: TE122.3

Development characteristics of Ordovician ancient subterranean river system in thrust anticline area of Tahe Oilfield, Tarim Basin

  • 摘要: 塔里木盆地塔河油田古暗河系统研究尚处于初始阶段,主要从暗河的深浅分布、结构样式等特征开展暗河洞穴的划分,较少从构造、断裂、古地貌、地下水位等地质方面综合分析复杂暗河系统的空间发育规律,致使暗河的主次从属关系、空间叠置样式、原始连通关系难以厘清,从而制约了塔河油田开发后期的综合治理研究。为了明确塔河油田主体区逆冲背斜区奥陶系古暗河系统发育特征,利用构造断裂解析、古地貌恢复、地震属性刻画、纵断剖面解读等方法进行了S67井区古暗河的类型识别、系统划分和地质成因研究,尤其首次识别并剖析了潜流回流暗河。结果表明,S67井区处于塔河主体区岩溶台原南缘的低地势区,发育幅差较小的峰丛洼地、溶丘洼地,地表水系下切深度较浅;逆冲背斜为低角度逆冲推覆构造样式,逆冲背斜之上的网格状断裂为多层状暗河系统提供有利溶蚀通道。研究区奥陶系发育相对独立的、树枝状结构的地下水位暗河系统和潜流带暗河系统,地下水位型暗河可分为主干型、支流型和废弃型,潜流回流暗河可分为上升型、对称型。控制逆冲背斜区古暗河发育的主要因素有古地貌、地下水位、逆冲背斜构造和次级断裂网络等。

     

  • 图  1  潜流回路洞道横截面示意及沉积物充填模式

    据参考文献[3]修改。

    Figure  1.  Schematic cross-section of a phreatic loop cave and sediment filling mode

    图  2  塔里木盆地塔河油田S67井区构造位置(a)、中下奥陶统古地貌(b)及地层柱状图(c)

    Figure  2.  Structural location (a), paleogeomorphology of Middle-Lower Ordovician (b), and stratigraphic column (c) of S67 well block of Tahe Oilfield, Tarim Basin

    图  3  塔里木盆地塔河油田S67井区中下奥陶统断裂分布

    a.中下奥陶统鹰山组云质灰岩段顶(T76)以下0~60 ms相干属性;b.中下奥陶统鹰山组下段(T76—T78)张量梯度厚度属性;c.中下奥陶统顶断裂平面分布。

    Figure  3.  Fault distribution in Middle-Lower Ordovician of S67 well block of Tahe Oilfield, Tarim Basin

    图  4  塔里木盆地塔河油田S67井区逆冲断裂横切地震剖面

    剖面位置见图 3c

    Figure  4.  Transverse seismic profile of thrust fault in S67 well block of Tahe Oilfield, Tarim Basin

    图  5  塔里木盆地塔河油田S67井区古暗河岩溶洞穴分布

    a.中下奥陶统顶面以下60 ms振幅属性;b.中下奥陶统鹰山组云质灰岩段顶(T76)以上60 ms振幅属性;c.暗河洞穴系统空间雕刻。

    Figure  5.  Plane distribution of paleokarst caves in S67 well block of Tahe Oilfield, Tarim Basin

    图  6  塔里木盆地塔河油田S67井区地下水位暗河地震响应特征

    a.主干地下水位暗河标定地震剖面;b.主干地下水位暗河标定波阻抗剖面;c.支流地下水位暗河标定地震剖面;d.支流地下水位暗河标定波阻抗剖面;e.废弃地下水位暗河标定地震剖面;f.废弃地下水位暗河标定波阻抗剖面。剖面位置见图 5a

    Figure  6.  Seismic response characteristics of water-table subterranean river of S67 well block of Tahe Oilfield, Tarim Basin

    图  7  塔里木盆地塔河油田S67井区潜流回路暗河地震响应特征

    a.上升型潜流回流暗河(北支)标定地震剖面;b.上升型潜流回流暗河(北支)标定波阻抗剖面;c.上升型潜流回流暗河(南支)标定地震剖面;d.上升型潜流回流暗河(南支)标定波阻抗剖面;e.对称型潜流回流暗河标定地震剖面;f.对称型潜流回流暗河标定波阻抗剖面。剖面位置见图 5b

    Figure  7.  Seismic response characteristics of phreatic loop subterranean river in S67 well block of Tahe Oilfield, Tarim Basin

    图  8  塔里木盆地塔河油田S67井区古暗河系统分布

    Figure  8.  Plane distribution of paleokarst subterranean river system of S67 well block of Tahe Oilfield, Tarim Basin

    图  9  塔里木盆地塔河油田S67井区古暗河系统发育模式示意

    Figure  9.  Development pattern of paleokarst subterranean river system of S67 well block of Tahe Oilfield, Tarim Basin

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  • 收稿日期:  2023-03-10
  • 修回日期:  2024-01-31
  • 刊出日期:  2024-03-28

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