Back to Search Start Over

Influence of ionic composition in aqueous solution on wettability of rock surface-experiment and economics evaluation

Authors :
Jinjian Hou
Chang Liu
Xiuling Yuan
Lihua Ma
Huizhe Yan
Hongwen Zhang
Yonghui Wang
Yufei Chen
Source :
Arabian Journal of Chemistry, Vol 16, Iss 5, Pp 104632- (2023)
Publication Year :
2023
Publisher :
Elsevier, 2023.

Abstract

In this study, the influence of different ionic composition in aqueous solution on the minerals surface wettability was studied. The differences effect of monovalent ion and divalent ions onto the wettability alteration were studied. The anions were Cl- and SO42-. The SO42- could make the minerals surface more hydrophilic. Besides, the influence of NaCl, MgCl2, CaCl2, Na2SO4, K2SO4 and MgSO4 on the mineral wettability alteration were studied. The results indicated that divalent ions showed significant impact on the minerals wettability alteration, compared with monovalent ion. The reasons were due to the fact that divalent ions showed higher ions adsorption than monovalent ion, and divalent ions have higher effect on compressing the electric double layer. The static contact angle and dynamic contact angle were measured. Different heavy oils were studied, including heavy oil with 100 ppm, heavy oil, heavy oil without resins, heavy oil without asphaltenes. The results showed that the asphaltenes would make it difficult for the heavy oils to liberate from minerals, thus decreasing the oil drops contact angle. Then the resins would decrease the heavy oil contact angles. CaCl2/MgCl2 and K2SO4 have synergistic effect on the change of the minerals surface wettability. Atomic force microscope (AFM) measurement indicated that the ions would effectively decrease the interaction force on the surface of heavy oil-minerals, which was beneficial to the heavy oil liberation. The roughness measurement indicated that the different ions would effectively increase the minerals surface wettability.

Details

Language :
English
ISSN :
18785352
Volume :
16
Issue :
5
Database :
Directory of Open Access Journals
Journal :
Arabian Journal of Chemistry
Publication Type :
Academic Journal
Accession number :
edsdoj.33c35c95db4f40f39f5f628070afd875
Document Type :
article
Full Text :
https://doi.org/10.1016/j.arabjc.2023.104632