石油与天然气地质 ›› 2017, Vol. 38 ›› Issue (1): 110-120.doi: 10.11743/ogg20170112

• 油气地质 • 上一篇    下一篇

辽河坳陷双台子构造带沙三段层序格架内沉积特征及演化

满欣欣1,2, 王红亮2, 单俊峰1   

  1. 1. 中国地质大学(北京) 能源学院, 北京 100083;
    2. 中国石油 辽河油田分公司 勘探开发研究院, 辽宁 盘锦 124010
  • 收稿日期:2016-11-09 修回日期:2016-12-16 出版日期:2017-02-28 发布日期:2017-02-27
  • 通讯作者: 王红亮(1971-),男,博士、副教授,层序地层学。E-mail:whl4321@sohu.com。 E-mail:whl4321@sohu.com
  • 作者简介:满欣欣(1990-),女,硕士、助理工程师,应用沉积学。E-mail:manxinx@163.com。
  • 基金资助:

    国家自然科学基金项目(91114203)。

Characteristics and evolution of sedimentary sequences of the 3rd member of Shahejie Formation in Shuangtaizi tectonic belt, the Liaohe Depression

Man Xinxin1,2, Wang Hongliang2, Shan Junfeng1   

  1. 1. College of Energy Resources, China University of Geosciences(Beijing), Beijing 100083, China;
    2. PetroChina Petroleum Liaohe Oilfield Company Exploration and Production Research Institute, Panjin, Liaoning 124010, China
  • Received:2016-11-09 Revised:2016-12-16 Online:2017-02-28 Published:2017-02-27

摘要:

针对辽河坳陷双台子地区勘探程度低、物源类型多、沉积条件复杂等问题,以陆相断陷湖盆层序地层学和沉积学理论为指导,对研究区沙河街组三段层序地层格架内的沉积相进行研究。通过岩心相标志分析,结合钻、测井和地震资料,识别了研究区沙三段发育扇三角洲、湖底扇和湖泊相3种沉积相类型。运用层序地层学理论及技术方法,建立了研究区沙河街组三段层序地层格架,将沙河街组三段划分为沙三下层序、沙三中层序和沙三上层序3个三级层序。沙三下层序和沙三中层序上升半旋回时期以大规模发育湖底扇为主;沙三中层序下降半旋回和沙三上层序时期北部发育扇三角洲,南部发育湖底扇。总体上,湖底扇呈现不断向凹陷中心迁移的特征,规模上呈现由小到大、再变小的沉积格局。

关键词: 层序地层, 沉积相, 沙三段, 双台子构造带, 辽河坳陷

Abstract:

The Shuangatizi area in Liaohe Depression with multi-typed provenances and complicated sedimentary conditions has not been well explored.Armed with terrestrial rift basin sequence stratigraphy and sedimentology theories,the authors studied the sedimentary facies in the sequence stratigraphic framework of the third member of Shahejie Formation (Sha-3 member) through comprehensive analysis of core facies marks,drilling/logging and seismic data.Three sedimentary facies were identified,including the fan delta,the sublacustrine fan and the lacustrine facies.A sequence stratigraphic framework with 3 third-order sequences (namely the lower Sha-3 sequence,the middle Sha-3 sequence,the upper Sha-3 sequence) was also established by using relevant theories and technologies for the third member.It shows that sublacustrine fans were developed extensively during the full sycle of the lower and the ascending half cycle of the middle Sha-3 sequences,fan deltas were developed in the north part of the area and sublacustrine fans were developed in the south part of the area during the descending half cycle of the middle Sha-3 and the full cycle of the upper Sha-3.In general,the sublacustrine fans show features of migration towards the central depression with scales changing from small to large and then to small again.

Key words: sequence stratigraphy, sedimentary facies, 3rd member of Shahejie Formation, Shuangtaizi tectonic belt, Liaohe Depression

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