石油学报 ›› 2016, Vol. 37 ›› Issue (4): 415-429.DOI: 10.7623/syxb201604001

• 地质勘探 •    下一篇

准噶尔盆地南缘油气生成与分布规律——典型油藏油源解剖与原油分布规律

陈建平1,2,3, 王绪龙4, 邓春萍1,2,3, 赵喆1, 倪云燕1,2,3, 孙永革5, 杨海波4, 王汇彤1,2,3, 梁狄刚1,2,3   

  1. 1. 中国石油勘探开发研究院 北京 100083;
    2. 提高石油采收率国家重点实验室 北京 100083;
    3. 中国石油天然气集团公司油气地球化学重点实验室 北京 100083;
    4. 中国石油新疆油田公司 新疆克拉玛依 834000;
    5. 浙江大学地球科学学院 浙江杭州 310027
  • 收稿日期:2015-08-09 修回日期:2015-12-05 出版日期:2016-04-25 发布日期:2016-05-06
  • 通讯作者: 陈建平,男,1962年10月生,1983年获山东矿业学院学士学位,2003年获中国矿业大学(北京)博士学位,现为中国石油天然气集团公司油气地球化学重点实验室副主任、中国石油勘探开发研究院教授级高级工程师,主要从事油气地球化学研究工作。Email:chenjp@petrochina.com.cn
  • 作者简介:陈建平,男,1962年10月生,1983年获山东矿业学院学士学位,2003年获中国矿业大学(北京)博士学位,现为中国石油天然气集团公司油气地球化学重点实验室副主任、中国石油勘探开发研究院教授级高级工程师,主要从事油气地球化学研究工作。Email:chenjp@petrochina.com.cn
  • 基金资助:

    中国石油天然气股份有限公司科学研究与技术开发项目(06-01A-01-02、2011A-0201、2014A-0211)资助。

Investigation of typical reservoirs and occurrence regularity of crude oils in the southern margin of Junggar Basin, Northwestern China

Chen Jianping1,2,3, Wang Xulong4, Deng Chunping1,2,3, Zhao Zhe1, Ni Yunyan1,2,3, Sun Yongge5, Yang Haibo4, Wang Huitong1,2,3, Liang Digang1,2,3   

  1. 1. PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China;
    2. State Key Laboratory of Enhanced Oil Recovery, Beijing 100083, China;
    3. CNPC Key Laboratory of Petroleum Geochemistry, Beijing 100083, China;
    4. PetroChina Xinjiang Oilfield Company, Xinjiang Karamay 834000, China;
    5. School of Earth Science, Zhejiang University, Zhejiang Hangzhou 310027, China
  • Received:2015-08-09 Revised:2015-12-05 Online:2016-04-25 Published:2016-05-06

摘要:

准噶尔盆地南缘地区发育40多个背斜构造、5套有效烃源岩,大多数背斜构造发现了油气或存在油气苗,原油性质呈现多样性变化,长期以来对该地区不同构造原油的来源存在多种观点。在南缘地区典型原油地球化学特征与油源对比的基础上,选择了南缘地区具有代表性的典型背斜构造油藏,对其原油油源进行了深入细致的解剖研究。结果表明,南缘地区绝大多数背斜构造油藏原油为单一烃源来源,不同时代烃源岩生成原油混合现象并不普遍,只有少数油藏存在混源油。不同区域背斜构造原油油源存在较大差异,原油来源严格受控于有效烃源岩的分布:二叠系来源的原油主要分布于南缘中部以东的山前构造,侏罗系来源的原油主要分布于南缘西部及南缘东部构造,白垩系来源的原油仅分布于南缘中部构造,古近系来源的原油仅分布于南缘西部构造;齐古油田侏罗系油藏原油为二叠系与侏罗系原油的混合,各自的贡献约占50%。

关键词: 准噶尔盆地南缘, 油源对比, 油藏, 碳同位素, 生物标志物

Abstract:

More than 40 anticlines and 5 sets of effective source rocks are developed in the southern margin of Junggar Basin. Oil/gas or oil/gas seepage has been found in most anticlines with diversified change in crude oil property. There are multiple views on the source of crude oil with different structures in this region for long time. Based on the geochemical characteristics of typical crude oil and oil-source correlation in the southern margin, representative and typical anticline oil reservoirs in the southern margin were selected for deep and detailed researches on the source of crude oil. The results show that the crude oil has single hydrocarbon source in most of anticline oil reservoirs at the southern margin, and there is little possibility for the mixing of crude oil derived from source rocks in different ages, while the mixed-source oil only exists in a few oil reservoirs. A remarkable difference exists in the source of crude oil from various anticline structures in different regions, and the source and occurrence of crude oil is strictly controlled by the distribution of effective source rocks. The Permian crude oil is mainly distributed in the foothill structural zone east to the middle section of southern margin; Jurassic crude oil is mainly distributed in the east and west section of southern margin; Cretaceous crude oil is only distributed in the middle section of southern margin; Paleogene crude oil is only distributed in the west section of southern margin. The crude oil in the Jurassic reservoirs of the Qigu oilfield is a mixture of Permian and Jurassic crude oil with a contribution rate of 50% for each.

Key words: southern margin of Junggar Basin, oil-source correlation, oil reservoirs, carbon isotope, biomarker

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