TY - JOUR
T1 - Distribution of adsorbed water in shale
T2 - An experimental study on isolated kerogen and bulk shale samples
AU - Zou, Jie
AU - Rezaee, Reza
AU - Yuan, Yujie
AU - Liu, Kouqi
AU - Xie, Quan
AU - You, Lijun
N1 - Publisher Copyright:
© 2019
PY - 2020/4
Y1 - 2020/4
N2 - Bakken shale samples were studied for distribution of adsorbed water using low-pressure nitrogen sorption. By comparing results between dry and wet samples, the distribution of adsorbed water in shale was determined. Two of the isolated kerogen samples show a striking change of pore size distribution (PSD) in large pores (>16 nm), indicating the pronounced distribution of adsorbed water in large pores of organic matter. As for the bulk shale, water can adsorb in both small (<16 nm) and large pores (>16 nm) depending on hydrophilic sites. However, hydrophilic sites in small pores are mainly contributed by inorganic matter, while hydrophilic sites in large pores are composed of inorganic or organic matter. The overall results therefore clarify the contribution of inorganic and organic matter to water adsorption in shale and provide a better understanding of the significance of adsorbed water in shale.
AB - Bakken shale samples were studied for distribution of adsorbed water using low-pressure nitrogen sorption. By comparing results between dry and wet samples, the distribution of adsorbed water in shale was determined. Two of the isolated kerogen samples show a striking change of pore size distribution (PSD) in large pores (>16 nm), indicating the pronounced distribution of adsorbed water in large pores of organic matter. As for the bulk shale, water can adsorb in both small (<16 nm) and large pores (>16 nm) depending on hydrophilic sites. However, hydrophilic sites in small pores are mainly contributed by inorganic matter, while hydrophilic sites in large pores are composed of inorganic or organic matter. The overall results therefore clarify the contribution of inorganic and organic matter to water adsorption in shale and provide a better understanding of the significance of adsorbed water in shale.
KW - Adsorbed water distribution
KW - Gas adsorption
KW - Isolated kerogen
KW - Pore size distribution
KW - Shale
UR - http://www.scopus.com/inward/record.url?scp=85077061073&partnerID=8YFLogxK
U2 - 10.1016/j.petrol.2019.106858
DO - 10.1016/j.petrol.2019.106858
M3 - Article
AN - SCOPUS:85077061073
SN - 0920-4105
VL - 187
JO - Journal of Petroleum Science and Engineering
JF - Journal of Petroleum Science and Engineering
M1 - 106858
ER -