石油学报 ›› 2018, Vol. 39 ›› Issue (11): 1262-1271.DOI: 10.7623/syxb201811006

• 地质勘探 • 上一篇    下一篇

渤海海域辽西凸起北段新生代构造演化的磷灰石裂变径迹证据

张江涛, 吴奎, 王冰洁, 何京, 康琳   

  1. 中海石油(中国)有限公司天津分公司 天津 300459
  • 收稿日期:2018-01-30 修回日期:2018-07-16 出版日期:2018-11-25 发布日期:2018-12-10
  • 通讯作者: 张江涛,男,1988年10月生,2011年获中国石油大学(华东)学士学位,2014年获中国石油大学(华东)硕士学位,现为中海石油(中国)有限公司天津分公司渤海石油研究院勘探地质工程师,主要从事含油气盆地分析等方面的研究。Email:zhangjt28@cnooc.com.cn
  • 作者简介:张江涛,男,1988年10月生,2011年获中国石油大学(华东)学士学位,2014年获中国石油大学(华东)硕士学位,现为中海石油(中国)有限公司天津分公司渤海石油研究院勘探地质工程师,主要从事含油气盆地分析等方面的研究。Email:zhangjt28@cnooc.com.cn
  • 基金资助:

    国家科技重大专项(2016ZX05024-002-006)资助。

Apatite fission track evidence of Cenozoic tectonic evolution in the northern section of Liaoxi uplift,Bohai Sea

Zhang Jiangtao, Wu Kui, Wang Bingjie, He Jing, Kang Lin   

  1. Tianjin Branch, CNOOC China Limited, Tianjin 300459, China
  • Received:2018-01-30 Revised:2018-07-16 Online:2018-11-25 Published:2018-12-10

摘要:

通过对辽东湾坳陷辽西凸起北段5块样品的磷灰石裂变径迹测年和热演化史模拟,结合区域地质背景和钻井资料,分析了辽西凸起北段新生代的演化过程。辽西凸起北段在新生代整体发生了大规模的隆升和剥蚀,具有分块性和阶段性抬升剥蚀的特征。西块区存在2个剥蚀期,即65.0~45.8 Ma和25.3~18.6 Ma,平均剥蚀厚度分别为1 737 m和1 020 m;东块区的2个剥蚀期为65.0~36.7 Ma和25.1~19.6 Ma,平均剥蚀厚度分别为1765 m和711 m。辽西凸起北段的新生代构造演化整体划分为6个阶段,但在东、西块区存在明显的差异。新生代构造的时空演化差异主要受控于辽西2号断裂和3号断裂的垂向活动时代和强度。辽西凸起北段西块区的锦州25-1油田经历了2期油气成藏,早成藏期为25.4~24.2 Ma,晚成藏期为10.7~4.5 Ma。

关键词: 磷灰石裂变径迹, 热演化史模拟, 剥蚀量恢复, 构造演化, 辽西凸起北段

Abstract:

Through apatite fission track dating and thermal history simulation of five samples in the northern section of Liaoxi uplift, Liaodong Bay depression, the Cenozoic evolution process of the northern section in Liaoxi uplift was analyzed based on regional geological settings and drilling data. The northern section of Liaoxi uplift presented massive uplift and denudation in Cenozoic, characterized by blocky and phased uplift and denudation. The western block experienced two denudation phases, i.e., 65.0~45.8 Ma and 25.3~18.6 Ma, with the annual denudation thickness of 1737 m and 1020 m; the eastern block experienced two denudation phases of 65.0~36.7 Ma and 25.1~19.6 Ma, with the annual denudation thickness of 1 765 m and 711 m. The Cenozoic tectonic evolution in the northern section of Liaoxi uplift was divided into six stages, and significant differential uplift and decline occurred in the eastern and western blocks. The differences in spatiotemporal evolution of the Cenozoic tectonics were mainly controlled by the vertical activity age and intensity of No.2 and No.3 faults in Liaoxi. Jinzhou 25-1 oilfield in the western block of the northern section in Liaoxi uplift experienced two phases of hydrocarbon accumulation, and the early and late reservoir accumulation phase was 25.4~24.2 Ma and 10.7~4.5 Ma, respectively.

Key words: apatite fission track, thermal history simulation, denudation recovery, tectonic evolution, northern section of Liaoxi uplift

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