| 准噶尔盆地二叠系风城组白云岩储层特征及成因机理分析 |
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| 引用本文： | 薛晶晶,孙靖,朱筱敏,刘巍,朱世发.准噶尔盆地二叠系风城组白云岩储层特征及成因机理分析[J].现代地质,2012,26(4):755-761. |
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| 作者姓名： | 薛晶晶 孙靖 朱筱敏 刘巍 朱世发 |
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| 作者单位： | 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. 中国石油大学油气资源与探测国家重点实验室,北京102249;中国石油大学地球科学学院,北京102249 |
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| 摘 要： | 准噶尔盆地云质岩勘探近年来持续获得重大突破,打开了全新的勘探领域。通过岩心观察、薄片观察和分析等方法,结合前人研究成果,初步归纳了盆地云质岩的定义,明确有效储集岩类型及其产出特征和成因机理。云质岩具有岩性独特和分布局限的特点,主要产出于西北缘乌夏地区二叠系风城组。研究表明,盆地白云岩有纹层状、均匀分布状和雪花状等7种产出类型,共有准同生白云化作用、混合白云化作用和埋藏白云化作用等5种成因机理。风城组有效云质岩类储层包括白云质粉砂岩、白云质泥岩、泥质白云岩等多种岩性,最主要的储集空间为微裂缝。裂缝和溶孔的发育程度及配置关系优劣对产能高低有重要影响。不同类型白云岩的微观和宏观分布特征存在差异,多种白云岩化作用的叠加效应共同控制了现今白云岩的整体面貌。
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| 关 键 词： | 准噶尔盆地 风城组 白云岩 储层特征 成因机理 |
Characteristics and Formation Mechanism for Dolomite Reservoir of Permian Fengcheng Formation in Junggar Basin |
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| XUE Jing-jing
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SUN Jing
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ZHU Xiao-min
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LIU Wei
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ZHU Shi-fa.Characteristics and Formation Mechanism for Dolomite Reservoir of Permian Fengcheng Formation in Junggar Basin[J].Geoscience——Journal of Graduate School,China University of Geosciences,2012,26(4):755-761. |
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| Authors: | XUE Jing-jing SUN Jing ZHU Xiao-min LIU Wei ZHU Shi-fa |
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| Institution: | 2,3(1.Research Institute of Exploration and Development,Xinjiang Oilfield Company,PetroChina,Karamay,Xinjiang 834000,China; 2.State Key Laboratory of Petroleum Resource and Prospecting,China University of Petroleum,Beijing 102249,China; 3.College of Geosciences,China University of Petroleum,Beijing 102249,China) |
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| Abstract: | Recently,dolomitic-rock exploration of Junggar Basin has made a sustained breakthrough and opened a completely new exploration field.Definition of dolomitic-rock is concluded,and the effective reservoir type,characteristics of occurrence and formation mechanism of dolomite are determined based on previous research conclusions,core observation,thin section,and so on.The dolomitic-rock with special lithology and limited distribution mainly develops in Permian Fengcheng Formation of Wuxia district of the northwest margin.The dolomite has seven types of occurrence,including lameltate,uniform distribution,snow shape,irregular layered shape,crumb shape,fracture filling shape and exotic dolomite clastics.Corresponding,dolomite has five types of formation mechanism,including para-syngenetic dolomitization,mixed dolomitization,buried dolomitization,diagenetic dolomitization and weathering-transportation of external dolostone.The effective dolomitic-rock reservoirs whose space is microfissure,include dolomitic-siltstone,dolomitic-mudstone,muddy dolomite,and so on.Development degree and dispositional relationship of fissure and karst cave have an important impact on the level of capacity.Overall,the micro-and macro-distribution characteristics of different types of dolomite are different,and their superimposed effect controls the whole features of the present dolomite. |
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| Keywords: | Junggar Basin Fengcheng Formation dolomite reservoir characteristic formation mechanism |
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