天然气地球科学

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准噶尔盆地中拐凸起侏罗系八道湾组储层特征及控制因素

杨贵前,杜社宽,梁爽   

  1. 1.甘肃省油气资源研究重点实验室/中国科学院油气资源研究重点实验室,甘肃 兰州 730000;
    2.中国科学院大学,北京 100049
  • 收稿日期:2017-04-05 修回日期:2017-09-09 出版日期:2017-11-10 发布日期:2017-11-10
  • 通讯作者: 杜社宽(1963-),男,河南许昌人,副研究员,博士,主要从事地震资料解释与沉积储层研究. E-mail:dsk@petrochina.com.cn.
  • 作者简介:杨贵前(1988-),男,甘肃兰州人,硕士研究生,主要从事油气地球物理与沉积储层研究. E-mail:guiqianyang@163.com.
  • 基金资助:

    国家自然科学基金青年科学基金项目(编号:41503048)资助.

Reservoir characteristics and controlling factors of the Jurassic Badaowan Formation in Zhongguai Uplift,Junggar Basin

Yang Gui-qian,Du She-kuan,Liang Shuang
 
  

  1. 1.Key Laboratory of Petroleum Resources,Gansu Province/Key Laboratory of Petroleum Resources Research,Institute of Geology and Geophysics,Chinese Academy of Science,Lanzhou 730000,China;
    2.University of Chinese Academy of Sciences,Beijing 100049,China
  • Received:2017-04-05 Revised:2017-09-09 Online:2017-11-10 Published:2017-11-10

摘要:

综合中拐凸起侏罗系八道湾组岩心观察结果及薄片鉴定、扫描电镜、X-射线衍射等分析化验结果,研究其储层岩石学特征、孔隙类型、孔喉结构特征及物性特征等,结果表明:中拐凸起侏罗系八道湾组储层主要为中细砂岩,从八一段到八三段粒度渐粗,具有低成分成熟度、低泥质含量、低胶结物含量、中等结构成熟度特征;其储层类型主要为低孔低渗储层,少数为中孔中渗,主要发育原生粒间孔及残余粒间孔隙,其次为粒间溶孔,粒内溶孔发育程度低,呈现细喉道孔喉结构特征。以此为基础对储层物性的影响因素进行分析,结果显示:沉积微相是控制该区八道湾组储层发育的主要因素,粒级粗的砂岩往往物性更佳,是相对优质的储层;压实作用造成的原始孔隙损失占50%以上,是成岩过程中原生孔隙损失的主要因素,胶结作用造成的原始孔隙损失约为14%,是造成储层孔隙损失的次要因素;溶蚀作用造成了研究区内40%以上溶蚀孔隙的发育,对于储集性能的改善有极为重要的作用。
 

关键词: 中拐凸起, 八道湾组, 控制因素, 储层物性

Abstract:

A comprehensive study of Badaowan Formation in Zhongguai Uplift is performed,including the reservoir petrology,pore types,pore structure and material characteristics by using the core analysis,thin section identification,scanning electron microscopy and X-ray diffraction analysis.The results indicate that the Badaowan Formation reservoir belongs to a low-porosity-low-permeability reservoir,with few part of medium-porosity-medium-permeability reservoir;Med-fine grained sandstone mainly developed and the coarse grain size gradually becomes bigger with the depth increasing from one segment to three segments of Badaowan Formation.It shows the characteristics of low compositional maturity,low clay content,low cement content and medium textural maturity;The pore types showing fine throat structure characteristics.Sedimentary microfacies are the main factors controlling the development of the Badaowan Formation,coarse grained sandstones are often relatively high quality reservoirs.The compaction is the main factor of primary pore loss which caused the original pore loss more than 50%,and the development of plastic debris accelerates the compaction of sandstone.Cementation is the secondary factor of reservoir pore loss which caused almost 14% original pore loss.The dissolution has a very positive effect on reservoir performance and caused the dissolution pore to increase over 40%.
 

Key words: Zhongguai Uplift, Badaowan Formation, Controlling factors, Reservoir physical property

中图分类号: 

  • TE122.2

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