天然气地球科学

• 天然气地质学 • 上一篇    下一篇

准噶尔盆地玛湖凹陷下三叠统百口泉组源外“连续型”油藏成藏机理与富集规律

阿布力米提·依明,唐勇,曹剑,陈刚强,陈静,陶柯宇   

  1. (1.中国石油新疆油田分公司勘探开发研究院,新疆 克拉玛依 834000;
    2.南京大学地球科学与工程学院,江苏 南京 210023)
  • 收稿日期:2015-05-13 修回日期:2015-07-18 出版日期:2016-02-10 发布日期:2016-02-10
  • 作者简介:阿布力米提·依明(1970),男,维吾尔族,新疆莎车人,高级工程师,主要从事石油天然气地质学与勘探研究. Email:ablmt@petrochina.com.cn.
  • 基金资助:

    中国石油天然气股份公司科技重大专项“新疆大庆”(编号:2012E3401)资助.

Accumulation mechanism and enrichment rules of the continuous hydrocarbon plays in the Lower Triassic Baikouquan Formation of the Mahu Sag,Junggar Basin

Ablimit·Imin,Tang Yong,Cao Jian,Chen Gangqiang,Chen Jing,Tao Keyu   

  1. (1.Research Institute of Exploration and Development,PetroChina Xinjiang Oilfield Company,Karamay 834000,China;
    2.School of Earth Sciences and Engineering,Nanjing University,Nanjing 210023,China)
  • Received:2015-05-13 Revised:2015-07-18 Online:2016-02-10 Published:2016-02-10

摘要:

准噶尔盆地玛湖凹陷下三叠统百口泉组最近发现了该盆地首个源外“连续型”大型砂砾岩油气藏,展示出重要的典范研究意义。为及时丰富成藏理论与勘探实践,分析了成藏机理与富集规律。结果表明:百口泉组“连续型”油气成藏具有三大有利条件:资源基础好、储层和顶底板条件佳、油气充注和成藏演化配置好,这是油气能够源外大规模“连续型”成藏的机理。其富集规律与特色有三:优质湖相烃源岩提供了资源基础、沟通烃源和储集岩系的走滑断裂使得油气能够源外成藏、扇三角洲沉积体系提供了优越的储层与油气“连续型”分布条件。油气富集表现为“三元”控制:扇三角洲前缘沉积相带、构造鼻凸、断裂;此外,异常高压和裂缝对油气高产具有重要影响;这些多因素叠合之处为油气下步勘探的有利目标。

关键词: 连续型油气藏, 扇三角洲, 湖相优质烃源岩, 高熟轻质油气, 源外成藏, 百口泉组, 玛湖凹陷

Abstract:

Hydrocarbon exploration in the Mahu Sag of the northwestern Junggar Basin has recently gained a significant discoverycontinuous oil plays in the Lower Triassic Baikouquan Formation glutenite reservoir with a proven oil reserve of hundreds of millions tons,which is characterized by an extensive hydrocarbon accumulation far from source sequences.This displays significance of fundamental and practical studies.Here,to improve the theory and practice of the accumulation of this discovery,we address the accumulation mechanisms and enrichment rules of the hydrocarbon accumulations.Results show that there are three favorable conditions for the hydrocarbon accumulation in general:Large hydrocarbon resource base,good reservoir and overlying and underlying preservation conditions,and well matched hydrocarbon charge and evolution.The hydrocarbon accumulation has three special characteristics.High quality lacustrine source rocks provide a good resource base.Largescale transverse faults communicating with source and reservoir sequences make the longdistance migration possible.Fandelta sedimentary system provides good conditions for reservoir and continuous hydrocarbon occurrence.The enrichment of hydrocarbon accumulation is controlled by three elements:prodelta sedimentary facies,structural high points and faults.Abnormal reservoir overpressure and fractures have important impacts on hydrocarbon production.The combination of these controls decides the future favorable exploration targets.

Key words: Continuous oil and gas play, Fan delta, Lacustrine highquality source rock, Highly mature and light oil and gas, Hydrocarbon accumulation far from source sequences, Baikouquan Formation, Mahu Sag

中图分类号: 

  • TE122.2
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