Characteristics of nano-pore structure of clay minerals in shale and its effects on methane adsorption capacity

被引：0
|
作者：
Li Q. [1 ]
Cai Y. [1 ]
Hu H. [2 ]
机构：
[1] Mining Engineering Department, Shanxi Institute of Engineering and Technology, Yangquan
[2] Guizhou Research Center of Shale Gas and CBM Engineering Technology, Guiyang
来源：
Cai, Yongle (yqcylmmx@163.com) | 1600年 / China Coal Society卷 / 42期
关键词：
Clay minerals; Isothermal adsorption; Pore structure; Specific surface area;
D O I：
10.13225/j.cnki.jccs.2017.0097
中图分类号：
学科分类号：
摘要：
It is important for understanding the occurrence and migration output of shale gas to find out the pore structure characteristics of clay minerals and their effects on methane adsorption. This paper focuses on the study of low temperature liquid nitrogen and isothermal adsorption of methane based on montmorillonite, illite and chlorite in shale. The results show that: (1) The clay mineral pore structure is complex, which is mainly composed of nanopores, and the pore aperture 2-50 nm provides the main pore volume and surface area. In detail, the mesoporous of montmorillonite, illite and chlorite respectively accounted for 81.45%, 71.34% and 75.36% of the total pore volume and 88.70%, 87.70% and 90.65% of specific surface area. The hole (2-50 nm) pore constitute an important space of methane occurrence. (2)Clay minerals mainly develop the slit pores in parallel plate with small amount of ink bottle holes. (3) The difference between the gas adsorption capacity of distinct clay minerals is obvious, and the maximum adsorption amount of montmorillonite, illite and chlorite is 8.80, 3.27 and 2.69 cm3/g respectively. Clay minerals on methane adsorption is mainly controlled by the specific surface area of minerals, the maximum adsorption capacity and mesoporous specific surface area of clay minerals have a strong positive correlation. © 2017, Editorial Office of Journal of China Coal Society. All right reserved.
引用
收藏
页码：2414 / 2419
页数：5
相关论文
共 22 条
  • [1] Zhang X., Lu X., Zhang L., Et al., Occurrence of shale gas and their petroleum geological significance, Advances in Earth Sciences, 25, 6, pp. 597-598, (2010)
  • [2] Wang X., Liu Y., Zhang M., Et al., Conditions of formation and accumulation for shale gas, Natural Gas Geoscience, 21, 2, pp. 350-356, (2010)
  • [3] Chen S., Zhu Y., Wang H., Et al., Structure characteristics and accumulation significance of nanopores in Longmaxi shale gas reservoir in the southern Sichuan Basin, Journal of China Coal Society, 37, 3, pp. 438-444, (2012)
  • [4] Zhang J., Nie H., Xu B., Et al., Geological condition of shale gas accumulation in Sichuan Basin, Natural GAS Industry, 28, 2, pp. 151-156, (2008)
  • [5] Ma D., Cao S., Li P., Et al., Comparison on adsorption and desorption thermodynamics features between shale gas and coal-bed methane, Coal Science and Technology, 43, 2, pp. 64-67, (2015)
  • [6] Chen L., Jiang Z., Ji W., Et al., Characteristics of microscopic pore structures and their effect impacts on methane adsorption capacity in continental shales, Geological Journal of China Universities, 22, 2, pp. 335-343, (2016)
  • [7] Hou Y., He S., Yi J., Et al., Effect of pore structure on methane sorption capacity of shales, Petroleum Exploration and Development, 41, 2, pp. 248-256, (2014)
  • [8] Han S., Zhang J., Yang C., Et al., The characteristics of nanoscale pore and its gas storage capability in the Lower Cambrian shale of southeast Chongqing, Journal of China Coal Society, 38, 6, pp. 1038-1043, (2013)
  • [9] Tang S., Fan E., Methane adsorption characteristics of clay minerals in organic-rich shales, Journal of China Coal Society, 39, 8, pp. 1700-1706, (2014)
  • [10] Ji L., Qiu J., Zhang T., Et al., Experimental on methane adsorption of common clay minerals in shale, Earth Science-Journal of China University of Geosciences, 37, 5, pp. 1043-1050, (2012)
123