吴浩;郭英海;张春林;刘锐娥;

• 1:中国矿业大学资源与地球科学学院
• 2:中国矿业大学煤层气资源与成藏过程教育部重点实验室
• 3:中国石油勘探开发研究院廊坊分院

摘要：

以鄂尔多斯盆地陇东地区三叠统延长组长7段为例,应用铸体薄片、压汞毛管压力曲线、高分辨率场发射扫描电子显微镜、X-CT扫描技术等,分析致密油储层孔隙结构特征;对基于工区84组压汞及薄片鉴定数据,运用因子分析和k-均值聚类分析方法对孔隙结构进行分类.结果表明:长7段致密油储层主要储集空间类型包括溶蚀孔隙和原生剩余粒间孔隙,孔隙半径主要分布在5~30μm之间,吼道半径主要分布在0.5~2.0μm之间,孔隙结构表现为中—小孔、微—细喉型,分选较好,压汞曲线呈现略粗—细歪度;利用SPSS软件将陇东地区致密油储层孔隙结构划分为Ⅰ、Ⅱ、Ⅲ类,计算不同孔隙结构类型的参数分布特征,其中具有Ⅰ类孔隙结构特征的致密油储层为有利储层.该研究对后期致密油储层评价及勘探"甜点"优选具有参考意义.

关键词： 致密油储层;微观孔隙结构;孔隙结构分类;因子分析;k-均值聚类分析;三叠统;鄂尔多斯盆地

Abstract: Taking the Triassic Yanchang formation Chang7in Longdong area of Ordos basin as an example,using the casting slices,capillary pressure curves,high resolution field emission electron microscope and X-CT experiments,we analyzed the characteristics of micro-pore structure in tight oil reservoir,and made classifications of micro-pore structure using the Factor analysis and k-Means cluster analysis which was determined by the 84groups dates of mercury and thin section identification.The findings are as follows:the tight oil reservoir rooms of Chang7mainly include solution pore and primary remained intergranular pore.The sizes of the pore radius are mainly in a range of 5~30μm,and roared radius mainly concentrated in 0.5~2.0μm.The pore structure is characterized by meso-fine pores,micro-fine throats,better sorting,and mercury injection curves showed slightly coarse-fine skewness.Based on the SPSS software,micro-pore structure types are divided into three categories:Type Ⅰ,TypeⅡand TypeⅢ,and calculating the parameters of different type of pore structure distribution.TypeⅠ pore structure is in more favorable tight oil reservoir.The study of micro-pore structure of reservoir is great significance to evaluate the tight oil reservoir late and explore "sweet pot" of the preferred.

Keywords: tight oil reservoir;micro-pore structure;pore structure categories;Factor analysis;k-Means cluster analysis;Triassic;Ordos basin

基金项目: 中国石油天然气股份有限公司重大科技专项(2011E-2602)

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参考文献：

• [1]贾承造,郑民,张永峰.中国非常规油气资源与勘探开发前景[J].石油勘探与开发,2012,39(2):129-136.Jia Chengzao,Zheng Min,Zhang Yongfeng.Unconventional hydrocarbon resources in China and the prospect of exploration and development[J].Petroleum Exploration and Development,2012,39(2):129-136.
• [2]贾承造,邹才能,李建忠,等.中国致密油评价标准、主要类型、基本特征及资源前景[J].石油学报,2012,33(3):343-350.Jia Chengzao,Zou Caineng,Li Jianzhong,et al.Assessment criteria,main types,basic features and resource prospects of the tight oil in China[J].Acta Petrolei Sinica,2012,33(3):343-350.
• [3]邹才能,朱如凯,吴松涛,等.常规与非常规油气聚集类型、特征、机理及展望[J].石油学报,2012,33(2):173-187.Zou Caineng,Zhu Rukai,Wu Songtao,et al.Types,characteristics,genesis and prospects of conventional and unconventional hydrocarbon accumulations[J].Acta Petrolei Sinica,2012,33(2):173-187.
• [4]景东升,丁锋,袁际华.美国致密油勘探开发现状、经验及启示[J].国土资源情报,2012,1:18-19.Jing Dongsheng,Ding Feng,Yuan Jihua.The exploration and development situation,experience and revelation on U.S.tight oil[J].Land and Resources Information,2012,1:18-19.
• [5]李凤杰,王多云,张庆龙,等.鄂尔多斯盆地陇东地区延长组沉积相特征与层序地层分析[J].沉积学报,2006,24(4):549-554.Li Fengjie,Wang Duoyun,Zhang Qinglong,et al.Sedimentary facies characteristic and sequence stratigraphy analysis of Yanchang formation in Longdong area,Ordos basin[J].Acta Sedmentologica Sinica,2006,24(4):549-554.
• [6]陈洪德,倪新峰.陇东地区三叠系延长组沉积层序及充填响应特征相特征[J].石油与天然气地质,2006,27(2):143-151.Chen Hongde,Ni Xinfeng.Depositional sequence and filling response characteristics of Triassic Yanchang formation in Longdong area[J].Oil and Gas Geology,2006,27(2):143-151.
• [7]马德波,李明,崔文娟,等.陇东地区延长组长6-长7段浊积岩分布规律[J].新疆石油地质,2010,31(1):33-36.Ma Debo,Li Ming,Cui Wenjuan,et al.Turbidite distribution of Yangchang 6-7in Longdong area in Ordos basin[J].Xinjiang Petroleum Geology,2010,31(1):33-36.
• [8]杨华,刘自亮,朱筱敏,等.鄂尔多斯盆地西南缘上三叠统延长组物源与沉积体系特征[J].地学前缘,2013,20(2):10-18.Yang Hua,Liu Ziliang,Zhu Xiaomin,et al.Provenance and depositional systems of the upper Triassic Yanchang formation in the southwestern Ordos basin,China[J].Earth Science Frontiers,2013,20(2):10-18.
• [9]李凤杰,王多云,徐旭辉.鄂尔多斯盆地陇东地区三叠系延长组储层特征及影响因素分析[J].石油实验地质,2005,27(4):365-370.Li Fengjie,Wang Duoyun,Xu Xuhui.The influential factors and charactristics of Triassic Yangchang formation reservoir in Longdong area,Ordos basin[J].Petroleum Geology&Experiment,2005,27(4):365-370.
• [10]罗静兰,刘小洪,林潼,等.成岩作用与油气侵位对鄂尔多斯盆地延长组砂岩储层物性的影响[J].地质学报,2006,80(5):664-672.Luo Jinglan,Liu Xiaohong,Lin Tong,et al.Impact of diagenesis and hydrocarbon emlacement on sandstone reservoir quality of the Yanchang formation(upper Triassic)in the Ordos basin[J].Acta Geologica Sinica,2006,80(5):664-672.
• [11]钟大康,周立建,孙海涛,等.储层岩石学特征对成岩作用及孔隙发育的影响[J].石油与天然气地质,2012,33(6):890-899.Zhong Dakang,Zhou Lijian,Sun Haitao,et al.Influences of petrologic features on diagenesis and pore development[J].Oil and Gas Geology,2012,33(6):890-899.
• [12]钟大康,周立建,孙海涛,等.鄂尔多斯盆地陇东地区延长组砂岩储层岩石学特征[J].地学前缘,2013,20(2):52-60.Zhong Dakang,Zhou Lijian,Sun Haitao,et al.Petrology of sandstone reservoirs in Longdong area,Ordos basin[J].Earth Science Frontiers,2013,20(2):52-60.
• [13]鲁洪江,邢正岩,王永诗.压汞和退汞资料在储层评价中的综合应用探讨[J].油气采收率技术,1997,4(2):48-53.Lu Hongjiang,Xing Zhengyan,Wang Yongshi.Comprehensive application of intrusive-mercury and mercury-ejection data to reservoir evaluation[J].Oil and Gas Recovery Technology,1997,4(2):48-53.
• [14]胡志明,把智波,熊伟,等.低渗透油藏微观孔隙结构分析[J].大庆石油学院学报,2006,30(3):51-53.Hu Zhiming,Ba Zhibo,Xiong Wei,et al.Analysis of micro pore structure in low permeability reservoirs[J].Journal of Daqing Petroleum Institute,2006,30(3):51-53.
• [15]喻建,韩永林,凌升阶.鄂尔多斯盆地三叠系延长组油田成藏地质特征及油藏类型[J].中国石油勘探,2001,6(4):14-19.Yu Jian,Han Yonglin,Ling Shengjie.Pool-forming geology and pool types of Yanchang formation of upper Triassic in Ordos basin[J].China Petroleum Exploration,2001,6(4):14-19.
• [16]付金华,罗安湘,喻建,等.西峰油田成藏地质特征及勘探方向[J].石油学报,2004,25(2):25-29.Fu Jinhua,Luo Anxiang,Yu Jian,et al.Geological features of reservoir formation and exploration strategy of Xifeng oilfield[J].Acta Petrolei Sinica,2004,25(2):25-29.
• [17]赵俊兴,李凤杰,申晓莉,等.鄂尔多斯南部长6和长7油层浊流事件的沉积特征及发育模式[J].石油学报,2008,29(3):389-394.Zhao Junxing,Li Fengjie,Shen Xiaoli,et al.Sedimentary characteristics and development pattern of turbidity event of Chang6and Chang7oil reservoirs in the southern Ordos basin[J].Acta Petrolei Sinica,2008,29(3):389-394.
• [18]庞俊刚,李文厚,石硕,等.陕北地区长7沉积相特征及石油地质意义[J].西北大学学报,2010,40(3):488-492.Pang Jungang,Li Wenhou,Shi Shuo,et al.Sedimentary facies characteristic and petroleum geological significanc of Chang7in Shanbei area[J].Journal of Northwest University,2010,40(3):488-492.
• [19]杨华,钟大康,姚泾利,等.鄂尔多斯盆地陇东地区延长组砂岩储层孔隙成因类型及其控制因素[J].地学前缘,2013,20(2):69-76.Yang Hua,Zhong Dakang,Yao Jingli,et al.Pore genetic types and their controlling factors in sandstone reservoir of Yanchang formation in Longdong area,Ordos basin[J].Earth Science Frontiers,2013,20(2):69-76.
• [20]张春生,夏长滩,程启贵,等.靖安油田五里湾一区长6储层孔隙结构特征[J].矿物岩石,2001,21(1):38-42.Zhang Chunsheng,Xia Changhuai,Chen Qigui,et al.Characteristics of pore structure of Chang6reservoir,Wuliwanyiqu,Jingan oilfield[J].J Mineral Petrol,2001,21(1):38-42.
• [21]付晓燕,刘道天,郝龙,等.苏里格南区盒8段砂岩储层特征及主控因素[J].低渗透油气田,2012,3:85-89.Fu Xiaoyan,Liu Daotian,Hao Long,et al.Reservoirs characteristics and the main control factors of He8sandstone in Southern district of Sulige gasfield[J].Low Permeability Oil&Gas Field,2012,3:85-89.