地学前缘 ›› 2011, Vol. 18 ›› Issue (6): 195-217.

• 论文 • 上一篇    下一篇

松辽盆地松科1井上白垩统嫩江组一、二段沉积序列厘米级精细刻画:岩性·岩相·旋回

高有峰, 王璞珺, 程日辉, 王国栋, 万晓樵, 吴河勇, 王树学, 梁万林   


  1. 1.吉林大学 古生物学与地层学研究中心, 吉林 长春 130026
    2.吉林大学 地球科学学院, 吉林 长春 130061
    3.中国石油勘探开发研究院 西北分院, 甘肃 兰州 730020
    4.中国地质大学(北京) 地球科学与资源学院, 北京 100083
    5.大庆油田有限责任公司 勘探开发研究院, 黑龙江 大庆 163712
    6.大庆油田有限责任公司 地质录井分公司, 黑龙江 大庆 163411
  • 收稿日期:2011-06-11 修回日期:2011-07-20 出版日期:2011-11-25 发布日期:2011-12-05
  • 作者简介:高有峰(1982—),男,博士,讲师,主要从事盆地地层和沉积地质学研究。E-mail:gaoyf_1982@163.com
  • 基金资助:

    国家重点基础研究发展计划“973”项目(2012CB822002)

Centimeterscale sedimentary sequence description of Upper Cretaceous Nenjiang Formation (lower numbers 1&2): Lithostratigraphy,facies and cyclostratigraphy, based on the scientific drilling (SK1) borehole in the Songliao Basin.

  1. 1. Research Center of Palaeontology & Stratigraphy, Jilin University, Changchun 130026, China
    2. College of Earth Sciences, Jilin University, Changchun 130061, China
    3. Research Institute of Petroleum Exploration & DevelopmentNorthwest(NWGI), PetroChina, Lanzhou 730020, China
    4. School of Earth Sciences and Resources, China University of Geosciences(Beijing), Beijing 100083, China
    5. Institute of Exploration and Development of Daqing Oilfield Company Ltd., Daqing 163712, China
    6. Geological Logging Branch of Daqing Oilfield Company Ltd., Daqing 163411, China
  • Received:2011-06-11 Revised:2011-07-20 Online:2011-11-25 Published:2011-12-05

摘要:

中国白垩纪大陆科学钻探松科1井连续钻取嫩江组一、二段岩心长295 53 m,岩心收获率为97.45%,是迄今获取的最连续完整的沉积记录。文章对此进行了厘米级沉积地质描述(分层厚度2~5 cm)。嫩江组一、二段沉积时期与晚三冬—早坎潘期对应。通过对松科1井嫩江组一、二段岩心的精细描述,揭示其岩性岩相旋回的沉积序列及其过程。嫩江组一、二段共识别出12种岩石类型,为半深湖深湖亚相的白云岩沉积、泥灰岩沉积、灰质泥岩沉积、油页岩沉积、浊流沉积、深湖静水泥和火山灰沉积等7种沉积微相。在岩相序列上识别出5种共213个米级旋回(六级旋回)、54个五级旋回、12个四级旋回和2个三级旋回。连续的组段厘米级刻画为高精度沉积过程研究提供了可能,嫩江组一、二段全井段取心对松辽盆地缺氧事件、烃源岩及湖海沟通事件的研究具有重要意义。该文的精细描述资料为今后相关的深入研究提供了迄今最精准的基本地质素材。

关键词: 松辽盆地, 松科1井, 嫩江组一、二段, 沉积相, 沉积序列, 旋回地层

Abstract:

 China Cretaceous Continental Scientific Drilling (CCSD) in the Songliao Basin, called SK1 project, collected 29553 m of the lower members 1&2 of Nenjiang Formation which correspond to the late Santonian to early Campanian. The borehole got a highly continuous core section with recovery of 9745%,that is the most complete and precise sedimentary records up to now in the basin. Thicknesses of the description can be as thin as 25 cm for the interbedding sequences. We described  the sedimentary sequence, lithology, lithofacies and cyclic stratigraphy at the drilling spot in cmscale. Twelve lithotypes were recognized in the section. Sedimentary facies are predominantly lacustrine that can be subdivided into seven microfacies including dolomite, marl, argillaceous limestone, oil shale, turbidite, deep lake mudstone and volcanic ash microfacies. The whole sequence is composed of 213 meterscale cycles (sixthorder cycle), 54 fifthorder cycles, 12 fourthorder cycles and 2 thirdorder cycles. Centimeterscale depiction of the section revealed some previously unknown horizons such as special kind of mudstone, dolomite and volcanic ash of the formation. The new found evidences are very important for us to interpret basin evolution features such as lake anoxic, source rock development and the potential linkage between lake and adjacent sea. That is to say, the scientific drilling provides us with powerful insight into the basin. Researchers who are interested in the basin can do their reasonable analysis of the basin  on the basis of the precise original materials of the paper.

Key words: Songliao Basin, SK1, the first and second members of Nenjiang Formation, sedimentary facies, sedimentary sequence, cyclostratigraphy

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