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天然气地球科学

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准噶尔盆地玛湖地区石炭系构造圈闭勘探潜力

杨帆，卫延召，杨春，阿布力米提·依明，陈刚强，卞保力，李啸   

  1. (1.中国石油勘探开发研究院，北京 100083；2.中国石油新疆油田公司勘探开发研究院，新疆 克拉玛依 834000)
  • 收稿日期:2015-02-16 修回日期:2015-12-24 出版日期:2016-02-10 发布日期:2016-02-10
  • 作者简介:杨帆(1984)，男，满族，山东招远人，工程师，博士，主要从事岩性地层油气藏勘探研究. Email:yf2010@petrochina.com.cn.
  • 基金资助:

    国家科技重大专项“岩性地层区带、圈闭评价与储层预测技术”(编号：2011ZX05001003)；中国石油科技重大专项(编号：2014B0301)联合资助.

Evaluation of Carboniferous structural traps of Mahu Sag in the Junggar Basin

Yang Fan，Wei Yanzhao，Yang Chun，Abulimit·Imin，Chen Gangqiang，Bian Baoli，Li Xiao   

  1. (1.Research Institute of Exploration and Development,PetroChina,Beijing 100083,China;
    2.Research Institute of Exploration and Development,Xinjiang Oilfield Company,PetroChina,Karamay 834000,China)
  • Received:2015-02-16 Revised:2015-12-24 Online:2016-02-10 Published:2016-02-10

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摘要：

准噶尔盆地环玛湖富烃凹陷石炭系发育一系列继承性构造圈闭，成藏条件优越，但埋深普遍超过6 000m，深层构造是否发育有效储层，圈闭内是否存在天然气等轻质流体，是深层勘探能否获得成功、开发能否高产的关键问题。在单井资料匮乏的情况下，通过航磁异常处理、地震层速度分析等方法，认为玛北背斜、达1井背斜石炭系发育中基性火山岩风化壳储层，玛湖背斜、玛南背斜发育中酸性火山岩；玛湖背斜、玛南背斜的储层物性相对较差。根据玛湖地区烃源岩演化阶段、天然气成因分类等推测玛北背斜、玛湖背斜内主要赋存干酪根裂解气，达1井背斜为油气共存，玛南背斜为原油裂解气。综合储层、流体相态、成藏条件及埋深等因素，综合分析认为玛北背斜和达1井背斜成藏条件优越，成藏潜力大，有望获得高产气流及发现规模整装大气田。

关键词: 玛湖凹陷, 石炭系, 火山岩风化壳, 层速度, 流体相态

Abstract:

Several Carboniferous inheritance structural traps are identified in the Mahu Sag and its periphery in the northwestern Junggar Basin.These traps are adjacent to Mahu and Penyijingxi hydrocarbon source centers,and develop volcanic reservoir and dolomite reservoir whose physical properties are not controlled by depth.Whether the deep layer develops effective reservoirs,or the traps contain light oil or gas,these 2 key problems restricted the exploration of such giant structural virgin land.Using aeromagnetic anomaly,seismic velocity,source rock evolutional history,genesis of natural gas analysis,it shows that Mabei anticline and Dayijing anticline develop weathered volcanic curst reservoir in the Carboniferous,while the reservoirs in Mahu and Manan anticlines may be not good enough.The Mabei and Mahu anticlines contain kerogencracking gas,Manan anticline contains oilcracking gas,and Dayijing anticline has both oil and gas.According to the reservoir condition,phase behavior,burial depth,etc.,Mabei and Dayijing anticlines were suggested as preferred exploration targets and have potential to yield high productive gas and explore giant gas field.

Key words: Mahu Sag, Carboniferous, Weathered volcanic crust, Interval velocity, Fluid phase behavior

中图分类号: 

  • TE122.3

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