松辽盆地青山口组页岩的压汞孔隙结构及其地质意义
Pore structure of Qingshankou Formation shales in Songliao Basin and its geological significance
查看参考文献20篇
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文摘
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对松辽盆地青山口组页岩样品进行高压压汞测试,按墨水瓶孔喉模型计算页岩的孔喉比,分析页岩的孔隙结构参数对含油率的影响。结果表明:青山口组页岩的孔隙度为5.0%~8.0%,平均孔径为7.2~13.5 nm,平均孔喉比为4.9~36.2;页岩的汞滞留量为61%~84%,页岩的孔隙连通性整体较差;页岩以纳米孔隙为主,微米孔隙较少;纳米孔隙的孔喉比较小,孔隙连通性较好,微米孔隙的孔喉比较大,孔隙连通性较差;微米孔隙为页岩油的有效储集空间,纳米孔隙为页岩油在基质孔隙内运移的主要通道。 |
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其他语种文摘
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To study the influence of pore structure on shale oil accumulation, the pore structures of shales from Qingshankou Formation in Songliao Basin were determined by the mercury intrusion capillary pressure(MICP)method and the pore-throat ratio was calculated according to ink-bottle pore model. The results show that the porosity of these shales vary from 5.0% to 8.0%, the average pore size and pore-throat ratio are in a range of 7.2-13.5 nm and 4.9-36.2, respectively. The Hg-retained ratio is between 61% and 84%, indicating the poor connectivity of shale pores. The shales are dominated by nanoscale pores, and contain a small amount of micronscale pores. The nanoscale pores show a smaller value of pore-throat ratio and have a relatively good pore connectivity, while the micronscale pores display a larger value of pore-throat ratio and have a relatively poor pore connectivity. It is considered that the micronscale pores could be considered as the primarily store space of shale oil and the nanoscale pores act as the major pore-throats for shale oil accumulation. |
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来源
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中国石油大学学报. 自然科学版
,2021,45(6):35-41 【核心库】
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DOI
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10.3969/j.issn.1673-5005.2021.06.004
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关键词
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压汞法
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页岩油
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孔喉比
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青山口组
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松辽盆地
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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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中国科学院大学, 北京, 100049
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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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1673-5005 |
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学科
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石油、天然气工业 |
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基金
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国家自然科学基金创新研究群体项目
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文献收藏号
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CSCD:7147675
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