抽提前/后成熟页岩对氮气、二氧化碳的吸附特征及其对孔隙研究的意义
Adsorption of N_2 and CO_2 on mature shales before and after extraction and its implication for investigations of pore structures
查看参考文献27篇
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文摘
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选择了成熟度、有机质类型与矿物组成较为接近但有机碳含量（TOC）有明显差异的两个城市维护页岩进行了氮气、二氧化碳气体等温吸附分析，并考察了抽提前/后吸附特征的变化，尝试说明影像成熟页岩孔隙发育的主要因素。初步的结果表明，页岩的表面积主要取决于微孔的发育程度，而孔体积则与大孔的发育程度关系密切；微孔发育程度与页岩的有机碳含量有密切的关系；页岩抽提后对两种气体的媳妇辆相对于抽提前均显著增加，抽提前/后样品在60℃及110℃干燥等不同前处理方式下获得的氮气等温吸附数据表明，残留沥青对孔隙发育具有明显的制约作用。 |
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其他语种文摘
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Two mature shale samples, which show similar organic matter type, mineralogy and maturation level but different total organic carbon content (TOC), have been investigated using the adsorption of nitrogen and carbon dioxide to determine main factors that could influence pore structures of shales. Moreover, the comparison of gas adsorption was performed between extracted sample and un-extracted sample. Preliminary results suggest that micropores contribute more to the total specific surface area than mesopores, whereas macropores have a close relationship with the pore volume. Specific surface area of micropores shows a good correlation with TOC values of gas shales. The gas adsorption capacity of extracted samples is much larger than that of un-extracted samples. Nitrogen isothermal adsorption data of shale samples obtained by various pretreatment methods, such as drying of extracted and un-extracted samples at 60℃ and 110℃，respectively, show that residual bitumens in shales have significant restrictions for the development of pores. |
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来源
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地球化学
,2014,43(4):408-414 【核心库】
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关键词
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抽提
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成熟页岩
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气体吸附
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沥青
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孔隙
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地址
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1.
中国科学院广州地球化学研究所, 有机地球化学国家重点实验室, 广东, 广州, 510640
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陕西延长石油(集团)有限责任公司, 陕西, 西安, 710075
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中国科学院，广州地球化学研究所, 有机地球化学国家重点实验室, 广东, 广州, 510640
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中国科学院地质与地球物理研究所, 中国科学院油气资源研究重点实验室, 北京, 100026
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0379-1726 |
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学科
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地质学;石油、天然气工业 |
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基金
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国家973计划
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中国科学院广州地球化学研究所“一三五"项目
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有机地球化学国家重点实验室项目
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文献收藏号
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CSCD:5211484
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