鄂尔多斯盆地张台区长6储层特征及分类评价

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英文篇名：Characteristics and Classification Evaluation of Chang 6 Reservoir in Zhangtai Area of Ordos Basin 作者：杨涛 ; 刘刚 英文作者：YANG Tao;LIU Gang;Department of Geology, Northwest University; 关键词：储层特征 ; 测井相 ; 分类评价 ; 张台区 英文关键词：reservoir characteristics;;logging phase;;classification evaluation;;zhangtai area 中文刊名：LNHG 英文刊名：Liaoning Chemical Industry 机构：西北大学地质学系; 出版日期：2019-02-25 出版单位：辽宁化工 年：2019 期：v.48;No.448 语种：中文; 页：LNHG201902022 页数：4 CN：02 ISSN：21-1200/TQ 分类号：50-52+55

摘要

鄂尔多斯盆地张台区长6油层组属于低孔、特低渗-超低渗储层,非均质性较强,目前对该区储层详细的分类研究还相对缺乏,使得该区的勘探开发部署等受到制约。本次研究从岩石学特征、物性特征、测井相特征和沉积环境出发,结合前人研究成果对研究区长6油层组储层展开较为详细的研究,认为长6为三角洲相沉积,储层岩石类型以细砂岩为主,粒间孔和溶蚀孔是主要的孔隙类型,测井相类型有光滑箱形、齿化箱形、钟形和漏斗形。根据岩性、物性、储层系数、地层系数、综合指数和测井相特征对储层进行分类和评价,将研究区储层划分为3类,其中Ⅱ类和Ⅰ类为优质储层,Ⅲ类为差储层。
        The Chang 6 oil-bearing formation in Zhangtai area of Ordos Basin belongs to low-porosity and ultra-low permeability reservoirs with strong heterogeneity. At present,accurate understanding of the characteristics and distribution of high-quality reservoirs in this area is still relatively lacking, which restricts the exploration and development deployment of the area. Based on petrological characteristics, physical characteristics, well logging characteristics and sedimentary environment,combined with the previous research results, Chang 6 oil-bearing formation in the study area was studied. It's considered that the Chang 6 is a delta facies,the rock type is dominated by fine sandstone,the intergranular pores and the dissolution pores are the main pore types,and the logging phase types are smooth box type,toothed box shape,bell type and funnel type. According to the classification and evaluation of lithology, physical property, reservoir coefficient, formation coefficient, comprehensive index and well logging characteristics, the reservoirs in the study area can be divided into three categories. Among them, Class II and Class I are high-quality reservoirs, Class III is poor reservoir.

引文

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