古地理学报 ›› 2013, Vol. 15 ›› Issue (5): 624-634. doi: 10.7605/gdlxb.2013.05.050

• “非常规油气”专题 • 上一篇    下一篇

鄂尔多斯盆地三叠系延长组深水砂岩与致密油的关系*

付金华1, 2, 邓秀芹2, 3, 张晓磊2, 3, 罗安湘2, 3, 南珺祥2, 3   

  1. 1 中国石油长庆油田分公司, 陕西西安710018
    2 低渗透油气田勘探开发国家工程实验室, 陕西西安710018
    3 中国石油长庆油田分公司勘探开发研究院, 陕西西安710018
  • 收稿日期:2013-05-09 修回日期:2013-07-05 出版日期:2013-10-01 发布日期:2013-10-01
  • 作者简介:付金华, 男, 1962年生, 博士, 教授级高级工程师, 现任中国石油长庆油田分公司副总地质师, 长期从事油气地质综合研究及勘探管理工作。
  • 基金资助:
    国家科技重大专项“大型油气田及煤层气开发”(编号:2011ZX05044, 2011ZX05001-004)资助

Relationship between deepwater sandstone and tight oil of the Triassic Yanchang Formation in Ordos Basin

Fu Jinhua1, 2, Deng Xiuqin2, 3, Zhang Xiaolei2, 3, Luo Anxiang2, 3, Nan Junxiang2, 3   

  1. 1 Changqing Oilfield Company, PetroChina, Xi′an710018, Shaanxi
    2 National Engineering Laboratory for Exploration and Development of Low-Permeability Oil & Gas Fields, Xi′an710018, Shaanxi
    3 Research Institute of Exploration & Development of Changqing Oilfield Company, PetroChina, Xi′an710018, Shaanxi
  • Received:2013-05-09 Revised:2013-07-05 Online:2013-10-01 Published:2013-10-01
  • About author:Fu Jinhua, born in 1962, doctor, is a professor senior engineer and vice-chief geologist in Changqing Oilfield Company, PetroChina. Now he is engaged in comprehensive study and exploration management of oil and gas geology.

摘要: 鄂尔多斯盆地湖盆中部地区三叠系延长组长6油层组中下部和长7油层组中上部大面积发育深水砂岩, 这种砂岩具有厚度大、平行于湖盆长轴方向连续分布的特征。根据沉积结构、构造及接触关系, 将深水砂岩划分为砂质碎屑流成因的砂岩、浊流成因的砂岩、滑塌成因的砂岩及三角洲前缘成因的砂岩等4种沉积类型。在储集层矿物学、岩石学特征研究的基础上, 提出深水砂岩的沉积特征(如粒度细、云母和绿泥石等塑性颗粒含量高、陆源碳酸盐岩岩屑与伊利石杂基发育等)是造成储集层抗压实能力较差、胶结强烈、储集层致密的关键因素;在有利成藏条件分析中提出深水砂岩致密储集层处于油源中心、与烃源岩互层共生是形成大面积非常规致密油资源的重要控制因素。

关键词: 鄂尔多斯盆地, 延长组, 深水砂岩, 致密油

Abstract: A large area of deep water sandstone was developed during the depositional period between lower-mid Chang 6 and mid-upper Chang 7 intervals of Yanchang Formation of Triassic in the center of Ordos Basin. The large area sandstone had a great thickness and distributed continuously paralleled to the long axis of the basin. According to the sedimentary textures and structures and contact relationship, deepwater sandstone could be divided into four types, i. e., sandy debrite, slump stone, turbidite and delta front sandstones. On the base of reservoir characteristics of mineralogy and petrology, it was put forward that the sedimentary characteristics of deepwater sandstone, such as fine granularity, high content of plastic particles as mica and chlorite, as well as developing terrigenous matrix of carbonate and illite, were key factors that caused intense compaction and cementation in reservoir. Through analysis of favorable reservoir conditions, it was the important controlling factors for the forming of massive unconventional tight oil that deepwater sandstone locating in the center of oil source rock, and syngenetically interbedding with hydrocarbon source rock.

Key words: Ordos Basin, Yanchang Formation, deepwater sandstone, tight oil

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