| 鄂尔多斯盆地长7段致密储层微观特征研究 |
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| 引用本文： | 张忠义,陈世加,姚泾利,刘鑫,赵应权. 鄂尔多斯盆地长7段致密储层微观特征研究[J]. 西南石油大学学报(自然科学版), 2016, 38(6): 70-80. DOI: 10.11885/j.issn.1674-5086.2015.05.01.02 |
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| 作者姓名： | 张忠义 陈世加 姚泾利 刘鑫 赵应权 |
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| 作者单位： | 1. 西南石油大学地球科学与技术学院, 四川 成都 610500;2. 中国石油长庆油田公司勘探开发研究院, 陕西 西安 710018;3. 低渗透油气田勘探开发国家工程实验室, 陕西 西安 710018;4. 成都理工大学能源学院, 四川 成都 610059 |
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| 摘 要： | 针对鄂尔多斯盆地致密油储层特征复杂，缺乏系统研究的问题，通过大量岩芯观察，分析化验数据统计，同时采用恒速压汞实验、场发射及CT扫描等高分辨率测试手段和方法，对长7致密油储集层形成和特征进行了研究，认为延长组长7段致密油储集体由牵引流和重力流沉积的致密砂岩形成，具有粒度细，储层厚度大，脆性指数高，储层物性差等特征。孔隙类型以粒间孔和长石溶孔为主，可见孔隙含量低，主要发育微米-纳米级孔隙，喉道以片状和管状为主，受黏土矿物和有机质充填，有效孔隙体积小，但微裂缝发育，连通性好，储层含油层物性下限低，可动流体饱和度高。
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| 关 键 词： | 鄂尔多斯盆地 致密油 微、纳米孔隙 场发射 CT扫描 |
| 收稿时间： | 2015-05-01 |
A Study on Microscopic Pore Characteristics of Tight Reservoir of Chang 7 Sedimentation Section of Yanchang Formation,Ordos Basin |
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| ZHANG Zhongyi,CHEN Shijia,YAO Jingli,LIU Xin,ZHAO Yingquan. A Study on Microscopic Pore Characteristics of Tight Reservoir of Chang 7 Sedimentation Section of Yanchang Formation,Ordos Basin[J]. Journal of Southwest Petroleum University(Seience & Technology Edition), 2016, 38(6): 70-80. DOI: 10.11885/j.issn.1674-5086.2015.05.01.02 |
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| Authors: | ZHANG Zhongyi CHEN Shijia YAO Jingli LIU Xin ZHAO Yingquan |
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| Affiliation: | 1. School of Geoscience and Technology, Southwest Petroleum University, Chengdu, Sichuan 610500, China;2. Research Institute of Petroleum Exploration and Development, Changqing Oilfield Company, PetroChina, Xi'an, Shaanxi 710018, China;3. National Engineering Laboratory of Exploration and Development of Low Permeability Oil-gas Fields, Xi'an, Shaanxi 710018, China;4. College of Energy Resources, Chengdu University of Technology, Chengdu, Sichuan 610059, China |
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| Abstract: | There lacks systematic research into the complex characteristics of tight oil reservoir in Ordos Basin. By means of core observation, test data analysis, constant speed mercury injection experiment, field emission and CT scanning etc., we studied the formation and characteristics of Chang 7 tight oil reservoir. The research suggests that tight oil reservoir consists of tight sandstone formation of traction current and gravity flow deposits of Chang 7 section of Yanchang formation, which is of poor reservoir property with fine granularity, thick reservoir, high brittleness,. Pore types are mainly intergranular pores and feldspar dissolved pores which are mainly micro-nano-scale pores with flake-shaped and tube-shaped throats; due to the filling of clay minerals and organic matter, effective pore volume is small, but micro cracks are highly developed and are of good connectivity; lower limit of oil reservoir physical property is low, and fluid saturation is high. |
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| Keywords: | Ordos Basin tight oil micro-pores and nano-pores field emission CT sanning |
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