西南石油大学学报(自然科学版)

• 地质勘探 • 上一篇    下一篇

建南地区长兴期层序地层与沉积相演化

杨巍1,2,胡明毅1,2,高炎3   

  1. 1.“油气资源与勘探技术”教育部重点实验室长江大学,湖北武汉430100
    2. 长江大学地球科学学院,湖北武汉430100
    3. 中国石油新疆油田公司,新疆克拉玛依834000
  • 出版日期:2014-04-01 发布日期:2014-04-01
  • 基金资助:

    国家自然科学基金(41372136);教育部博士点基金(20124220110004);国家科技重大专项(2011ZX05007–002–001)。

Sequence Stratigraphy and Evolution of Sedimentary Facies of
Upper Perma in Jiannan Area

Yang Wei1,2, Hu Mingyi1,2, Gao Yan3   

  1. 1. MOE Key Laboratory of Exploration Technologies for Oil and Gas Resources,Yangtze University,Wuhan,Hubei 430100,China
    2. Faculty of Earth Science,Yangtze University,Wuhan,Hubei 430100,China
    3. Xinjiang Oilfield Company,CNPC,Karamay,Xinjiang 834000,China
  • Online:2014-04-01 Published:2014-04-01

摘要:

在建南地区长兴组沉积构造背景认识的基础上,针对沉积相与储层精细研究的需要,通过对关键层序界面的
识别,并综合测井、岩性信息进行高精度的四级层序划分,将研究区长兴组划分为两个三级层序,5 个四级层序,明确
了建南地区四级层序地层格架内长兴期储层纵向发育部位及沉积相横向分布规律。将单井四级层序地层标定到地震
剖面中并建立地震层序,通过引入地层等时切片技术,以四级层序格架内体系域为作图单元进行沉积相演化研究。结
果表明,建南地区长兴组下部三级层序经历了3 次海平面下降,高位体系域(HST)为主要的生物礁滩发育时期;上部
三级层序主要以白云岩暴露滩体发育为主,规模明显小于下部三级层序,其分布范围有向研究区中部迁移趋势。

关键词: 建南地区, 长兴组, 层序地层, 地层等时切片, 沉积相演化

Abstract:

Based on previous researches of sedimentary structure of Changxing Formation,and combining with reorganization
of sequence boundary,logging and lithology data,Changxing Formation in Jiannan Area has been divided into two three-order
sequences and five fourth-order sequences,the development of reservoir and transverse distribution of sedimentary facies within
fourth-order sequence in Changxing Formation have been studied in this paper. According to the calibration of fourth-order
sequence on seismic section and time-slice map of strata,taking system tract of fourth-order sequence as mapping unit,the
evolution of sedimentary facies is also discussed. The results indicate that the lower three-order sequence experienced three
times relative fall of sea level,the organic reef and bank mainly developing in the stage of HST;in the upper three-order
sequence,exposed organic bank with lithology of dolomite is widely distributed,but the scale is smaller than that of lower
three-order sequence and the distribution range moves to the central part of study area gradually.

Key words: Jiannan Area, Changxing Formation, sequence stratigraphy, isochronous strata slicing, sedimentary facies evolution