力学与实践 ›› 2018, Vol. 40 ›› Issue (5): 514-519.DOI: 10.6052/1000-0879-18-173

• 应用研究 • 上一篇    下一篇

基于气体吸附法和压汞法对页岩孔隙结构的研究1)

刘朋志*,†,**,2), 郭和坤†,**, 沈瑞†,**, 李海波†,**, 任惠琛†,**, 张春秋††   

  1. *(中国科学院大学工程科学学院,北京 100190);
    (中国科学院渗流流体力学研究所,河北廊坊 065007);
    **(中国石油勘探开发研究院渗流流体力学研究所, 河北廊坊 065007);
    ††(中国石油新疆油田公司实验检测研究院计量监督检测中心,新疆克拉玛依 843000)
  • 收稿日期:2018-04-28 出版日期:2018-10-15 发布日期:2018-11-14
  • 通讯作者: 2) 刘朋志,硕士研究生,主要研究方向为油气田开发。 E-mail: liu10223044@163.com
  • 基金资助:
    1) 国家重大科技专项基金资助项目(2017ZX05037001)

STUDY OF THE PORE STRUCTURE OF SHALE BASED ON GAS ADSORPTION METHOD AND MERCURY INTRUSION METHOD1)

LIU Pengzhi*,†,**,2), GUO Hekun†,**, SHEN Rui†,**, LI Haibo†,**, REN Huichen†,**, ZHANG Chunqiu††   

  1. *(College of Engineering Science, University of Chinese Academy of Sciences,Beijing 100190, China);
    (Institute of Porous Flow and Fluid Mechanics, Chinese Academy of Science, Langfang 065007, Hebei, China) ;
    **(Department of Porous Flow & Fluid Mechanics,Research Institute of Petroleum Exploration & Development, Langfang 065007, Hebei, China) ;
    ††(Measurement Supervision and Inspection Center of Experimental Testing Institute, PetroChina Xinjiang Oil-field Company, Karamay 843000, Xinjiang, China)
  • Received:2018-04-28 Online:2018-10-15 Published:2018-11-14

摘要: 四川盆地威远、渝西地区下志留统龙马溪组页岩广泛发育,为定量研究该区页岩孔隙结构特征,以威远、渝西地区页岩样品为例,运用二氧化碳吸附、低温氮吸附和高压压汞等实验技术,研究了目标储层的孔隙结构及孔径分布特征。结果表明,微孔发育主要集中于0.45 ~ 0.65 nm之间,介孔发育主要集中于2 ~5 nm之间,宏孔发育相对较差且分布不均匀;比表面积与微孔成正相关性,主要孔隙类型是细颈广体的墨水瓶孔等无定形孔隙,并含有一定量四周开放的平行板孔。

关键词: 页岩|孔隙结构|孔径分布|等温线|迟滞回线

Abstract: The Silurian Longmaxi Formation Shale is extensively developed in the Weiyuan and West Chongqing areas of the Sichuan Basin. The characteristics of the shale pore structure in the areas are quantitatively studied. With the shale samples in the Weiyuan and West Chongqing areas as examples, the characteristics of the pore structure and the pore size distribution of the reservoir are determined by using experimental techniques such as the carbon dioxide adsorption, the low-temperature nitrogen adsorption, and the high-pressure mercury injection. The results show that the development of micropores concerns mainly ones between 0.45 and 0.65 nm, the mesopores development concerns mainly ones between 2 and 5 nm, the macropores are relatively poorly developed and unevenly distributed, and the specific surface area is positively correlated with the micropores; the main pore type is the amorphous hole, such as an ink bottle hole with a wide neck, with a certain amount of parallel plate holes that are open to surrounding directions.

Key words: shale|pore structure|pore size distribution|isotherm|hysteresis loop

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