李虹霖,杨传超,张明升,等. 渤海海域走滑-伸展断块区断层侧封能力定量评价:以辽东湾坳陷旅大A区为例[J]. 海洋地质前沿,2022,38(8):47-54. DOI: 10.16028/j.1009-2722.2021.050
    引用本文: 李虹霖,杨传超,张明升,等. 渤海海域走滑-伸展断块区断层侧封能力定量评价:以辽东湾坳陷旅大A区为例[J]. 海洋地质前沿,2022,38(8):47-54. DOI: 10.16028/j.1009-2722.2021.050
    LI Honglin, YANG Chuanchao, ZHANG Mingsheng, et al. Quantitative evaluation of fault lateral sealing capacity in strike-slip-extension fault block area of Bohai Sea[J]. Marine Geology Frontiers, 2022, 38(8): 47-54. DOI: 10.16028/j.1009-2722.2021.050
    Citation: LI Honglin, YANG Chuanchao, ZHANG Mingsheng, et al. Quantitative evaluation of fault lateral sealing capacity in strike-slip-extension fault block area of Bohai Sea[J]. Marine Geology Frontiers, 2022, 38(8): 47-54. DOI: 10.16028/j.1009-2722.2021.050

    渤海海域走滑-伸展断块区断层侧封能力定量评价:以辽东湾坳陷旅大A区为例

    Quantitative evaluation of fault lateral sealing capacity in strike-slip-extension fault block area of Bohai Sea

    • 摘要: 渤海海域受郯庐走滑断裂带控制,发育独特的走滑-伸展复合断裂体系,形成了大量的复杂断块圈闭,传统方法难以定量评价断层的真实侧封能力。为此,以辽东湾坳陷旅大A区为例,在测井识别断层破碎带基础上,利用声波时差法判断断层力学性质,提出应力系数λ定量修正断层性质对侧封能力的影响,最终利用一种简化后的断-储排替压差法定量评价断层真实侧封能力,对断块油柱高度进行定量预测。

       

      Abstract: Controlled by the Tanlu strike-slip fault zone, a unique strike-slip and extensional composite fault system is developed in the Bohai Sea area, from which a large number of complex fault block traps was formed. At present, it is difficult to quantitatively evaluate the true lateral sealing ability of faults by traditional methods. The mechanical properties of the faults are so complex that the capacity of side sealing is difficult to be quantitatively evaluated. Therefore, using the Lvda A area of Liaodong Bay depression as an example, on the basis of logging identification of fault fracture zone, interval transit time was used to judge fault mechanical properties. The stress coefficient λ was proposed to quantitatively correct the influence of fault properties on lateral sealing ability. Finally, a simplified fault-reservoir displacement pressure difference method was used to quantitatively evaluate the true lateral sealing ability of fault blocks, and to quantitatively predict the height of oil column of fault blocks.

       

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