地质科技通报2026，Vol.45Issue(2)：2-10,9.DOI:10.19509/j.cnki.dzkq.tb20240405
裂谷盆地弧形断层成因机理与控油作用:以渤海海域盆地为例
Genetic mechanism and oil-controlling effect of curved faults in rift basins:A case study of the Bohai Sea area basins
摘要
Abstract
[Objective]There are numerous and widely distributed curved faults in the Bohai Sea,which control the development of structural traps.However,for a long time,the genetic mechanism of curved faults has not been systematically sorted out,and their impact on hydrocarbon accumulation has not been clarified,which restricts hydrocarbon exploration.[Methods]Based on 3D seismic data,fault displacement analysis,finite element stress simulation,and other methods,an in-depth study was conducted on the development mechanism and reservoir-controlling characteristics of the curved faults in the Bohai Sea.[Results]The results showed that the curved faults mainly included four types:lateral traction type,strike-connected type,oblique extensional type,and strike-slip rotating type.The lateral traction type had the largest fault displacement on the top of the arc,the oblique extensional type had the smallest fault displacement on the top of the arc,whereas the strike-connected type had the smallest fault displacement on the flank of the arc top.The large differential stress at the top of the curved faults promoted the development of microfractures and improved reservoir quality.The curved faults were usually self-migration and self-sealing faults,and the self-migration and self-sealing ability was related to the dip angle of the foot-wall strata of normal faults,the angle between the structural trap contours and the curved faults,and the curvature of the curved faults.The stronger the self-migration and self-sealing ability of the curved faults,the easier it was to form reservoirs.[Conclusion]This study clarifies the development mechanism of the curved faults in the Bohai Sea and their impact on hydrocarbon accumulation,providing important guidance for hydrocarbon exploration.关键词
弧形断层/成因机理/储层改善/自运自封/渤海海域Key words
curved fault/genetic mechanism/reservoir improvement/self-migration and self-sealing/Bohai Sea area分类
天文与地球科学引用本文复制引用
任健,苏凯,吴庆勋,王军,陈少伟..裂谷盆地弧形断层成因机理与控油作用:以渤海海域盆地为例[J].地质科技通报,2026,45(2):2-10,9.基金项目
中国海洋石油有限公司综合科研项目"渤海大中型天然气田形成条件、富集规律与勘探方向研究"(KJZH-2024-2107) （KJZH-2024-2107）
国家科技重大专项专题"南黄海盆地与中上扬子成盆-成烃条件差异及潜在富生烃凹陷优选"(2025ZD1402801-04) （2025ZD1402801-04）
