天然气地球科学 ›› 2008, Vol. 19 ›› Issue (1): 56–61.doi: 10.11764/j.issn.1672-1926.2008.01.56

• 天然气地质学 • 上一篇    下一篇

济阳坳陷断裂发育特征及其对油气成藏的控制作用

蔡佑星1,2   

  1. (1.中国科学院广州地球化学研究所,广东 广州 510640; 2.中国科学院研究生院,北京 100049)
  • 收稿日期:2007-07-24 修回日期:2008-01-04 出版日期:2008-02-10 发布日期:2008-02-10
  • 通讯作者: 蔡佑星caiyouxing@163.com. E-mail:caiyouxing@163.com.

Characteristics of Fault Developed in Jiyang Sag and Its Control Over Hydrocarbon Migration and Accumulation

CAI You-xing1,2   

  1. (Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China)
  • Received:2007-07-24 Revised:2008-01-04 Online:2008-02-10 Published:2008-02-10

摘要:

受晚中生代—古近纪中国东部大规模裂陷成盆期伴随的走滑作用和新生代以来印度—欧亚大陆碰撞作用以及古太平洋板块俯冲作用的影响,济阳坳陷应力场具有多期性、多向性和复杂性,其内中、新生代断裂构造十分发育,断裂组合形态复杂、多样,最常见的“Y”与反“Y”字复合型断层组合形成的背斜或断鼻构造是主要的油气赋存聚集场所,不同级别断裂对坳陷构造、沉积和油气的控制作用各不相同,同沉积断裂对坳陷(盆地)的形成及油气运聚、成藏起着十分重要的控制作用。

关键词: 济阳坳陷, 断裂特征, 油气成藏, 中—新生代

Abstract:

The Jiyang sag is a Meso-Cenozoic faulting basin developed in the North China platform, whose stress field is of poly-phase, multi-direction and complexity because of strike-slip together with large-scale rifting basinogenesis in eastern China, as well as collision and subduction between the India-Eurasia continent and the paleo-Pacific plate since late Mesozoic Era. Faults in this basin are developed very well with a polyphased and long-termed active nature. Geometrically, there are four kinds of fault lateral combinations: parallel, echelon, brush and oblique faults. And the faults can be classified into reverse, negative and positive inversion and flower faults. According to the scale and its control over tectonic, sedimentary and hydrocarbon migration and accumulation, the faults can be orderly divided into five kinds: basin-controlling, subsag-controlling, depression-controlling, fans-controlling and sandbody-controlling faults. As a superimposed sagging basin, its major oil-gas reservoirs are anticlines or fault-nose structures, which are mainly composed of “y” and “anti-y” shapes of compound fault series. Faults of various scales play different roles in controlling depression, sedimentation and hydrocarbon accumulation. The syn-sedimentary fault plays a very important role in both formation of sag and migration and accumulation of oil and natural gas.

Key words: Jiyang sag, Fault characteristics, Oil-gas reservoir, Meso-Cenozoic Era.

中图分类号: 

  • TE121.2

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