石油与天然气地质 ›› 2003, Vol. 24 ›› Issue (4): 367-370,400.doi: 10.11743/ogg20030412

• 油气地质 • 上一篇    下一篇

中国东部构造-热体制与断陷盆地多期性迁移特征

朱建辉   

  1. 中国石化石油勘探开发研究院实验地质研究所, 江苏, 无锡, 214151
  • 收稿日期:2003-07-19 出版日期:2003-12-25 发布日期:2012-01-16
  • 基金资助:

    中国石化科技项目“中国东部第三系断陷盆地油气成藏理论研究”部分成果

TECTONIC THERMAL REGIME AND MULTIPLE TRANSPORTING CHARACTERISTICS OF FAULTED BASINS IN EASTERN CHINA

Zhu Jianhui   

  1. Wuxi Branch of Experimental Petroleum Geology, Exploration & Production Research Institute, SINOPEC, Wuxi, Jiangsu
  • Received:2003-07-19 Online:2003-12-25 Published:2012-01-16

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摘要：

中国东部新生代断陷盆地为台地岩石圈相对减薄区,上地幔区域性抬升与今坳陷呈倒影关系。深部热能量通过壳幔层性质的改变以及岩浆岩的侵入传递到上地壳,形成了断陷期较高的地热场。后期热物质冷却收缩或迁移与区域性坳陷差异补偿相匹配形成了坳陷期较低的地热场。断陷期的高地热场及坳陷期的进一步深埋使源岩全面进入生烃阶段。主断裂系统活动中心及强度的改变直接影响了凹陷的沉降、沉积中心的变化,因而也带来了成烃作用的变化。因此,构造-热体制是导致中国东部盆地(坳陷)的沉积、沉降速率及资源丰度变化较大的主导因素之一。

关键词: 断陷, 坳陷转化, 主断层, 多期, 迁移

Abstract:

The Cenozoic faulted basins in eastern China are located in the relatively thinning area of platform lithosphere,where the regional uplifting of upper mantle and the present depression just like the inverted reflection in water. The thermal energy at depth can be transmitted upward to the upper crust through changes of crust and mantle properties and magmatic intrusion,which would resulted in a relatively high geothermal field during the fault-subsidence period.The high geothermal field during fault-subsidence and further deeply buried in depression stage would cause the source rocks to be in their hydrocarbon-generating stage.The changes of major fault system's active center and intensity would directly affect the variations of sag's subsidence and depocenter,which would also result in the variations of hydrocarbon generation.As for Subei basin,the relatively high resources abundance in the basin has resulted from the high sedimentation and subsidence rates of Bohai Bay basin in post-Oligocene.

Key words: fault depression, subsag transformation, major fault, multiple stages, transport

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