石油学报 ›› 2007, Vol. 28 ›› Issue (3): 27-31.DOI: 10.7623/syxb200703006

• 地质勘探 • 上一篇    下一篇

变形分解对柴达木盆地北缘油气运聚的影响

汪劲草1,3, 刘平3, 倪金龙2, 陈璐1, 曹海防3, 万方良1   

  1. 1. 桂林工学院资源与环境工程系, 广西桂林, 541004;
    2. 山东科技大学, 山东青岛, 266510;
    3. 中国科学院边缘海地质重点实验室, 广东广州, 510640
  • 收稿日期:2006-03-02 修回日期:2006-01-04 出版日期:2007-05-25 发布日期:2010-05-21
  • 作者简介:汪劲草,男,1963年10月生,2003年于中国科学院广州地球化学研究所博士后站出站,现为桂林工学院资源与环境工程系研究员,主要从事区域构造与成矿构造教学与科研工作.E-mail:Wangjc@glite.edu.cn
  • 基金资助:
    中国科学院边缘海地质重点实验室基金项目(MSGLCAS0405-5)和中国石油青海油田公司科研项目联合资助.

Effects of deformation partitioning on hydrocarbon migration-accumulation in the northern margin of Q aidam Basin

Wang Jincao1,3, Liu Ping3, Ni Jinlong2, Chen Lu1, Cao Haifang3, Wan Fangliang1   

  1. 1. Department of Resources and Environmental Engineering, Guilin University of Technology, Guilin 541004, China;
    2. Shandong University of Science and Technology, Qingdao 266510, China;
    3. Key Laboratory of Marginal Sea Geology, Chinese Academy of Sciences, Guangzhou 510640, China
  • Received:2006-03-02 Revised:2006-01-04 Online:2007-05-25 Published:2010-05-21

摘要: 柴北缘反“S”型构造是柴达木中、新生代叠合盆地在长期演化中形成的大型复合构造,其雏形最早源于早侏罗世的不对称倒“V”字型盆-岭构造,最后定型于新生代晚期(N2)柴北缘压剪断裂作用.将柴北缘压剪断裂系统的总应变分解为剪切应变分量与压缩应变分量,其剪切应变分量较小的区段也是压缩应变分量较大的区段.压缩应变分量较大的区段对应的冷湖构造带与鄂博梁构造带中的区段是油气流失的区段,而剪切应变分量较大的区段对应的冷湖构造带与鄂博梁构造带中的区段则是油气聚集的区段.因此,反“S”型构造中的冷湖六号、七号区段是油气流失区,冷湖三号、四号、五号区段及南八仙-马海一带是油气聚集区.

关键词: 压-剪断裂系统, 剪切应变, 压缩应变, 变形分解, 油气聚集, 柴达木盆地

Abstract: The reverse "S" structure in the northern margin of Qaidam Basin is a large compound structure evolved from the Meso-Neozoic Qaidam Superimposed Basin.The compound structure initiated from an asymmetric inverted V-type basin-mountain structure in the Early Jurassic and finalized by the compression-shear fracturing in the Late Cenozoic.The total strain of compression-shear fracture system in the northern margin of Qaidam Basin was decomposed into a shear-strain component and a compression-strain component.In the area of smaller shear-strain component,the compression-strain component is larger.The areas with the larger shear-strain component in Lenghu and Eboliang structural belts have good hydrocarbon accumulation,such as No.3,No.4 and No.5 districts in the Lenghu structural belt and Nanbaxian-Mahai area,while the areas with larger compression-strain components in Lenghu and Eboliang structural belts have the spaces for hydrocarbon loss,such as No.6 and No.7 districts in Lenghu structural belt.

Key words: compression shear fracture system, shear strain, compression strain, deformation partitioning, hydrocarbon accumulation, Qaidam Basin

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