A laboratory scale approach to wettability restoration in chalk core samples
Sachdeva, Jaspreet Singh; Sripal, Edison A.; Nermoen, Anders; Korsnes, Reidar Inge; Madland, Merete Vadla; James, Lesley A.
Peer reviewed, Journal article
Published version
View/ Open
Date
2019Metadata
Show full item recordCollections
Original version
Sachdeva, J. S., Sripal, E. A., Nermoen, A., Korsnes, R. I., Madland, M. V., & James, L. A. (2019). A laboratory scale approach to wettability restoration in chalk core samples. In E3S Web of Conferences (Vol. 89, p. 03003). EDP Sciences. 10.1051/e3sconf/20198903003Abstract
Wettability in chalk has been studied comprehensively to understand fluid flow mechanisms impacting coreflooding experiments. Wettability becomes paramount in understanding the parameters influencing chalk-fluid interactions. The main objective of this work is to evaluate as to which degree the wettability in chalk core samples can be controlled in the laboratory. Kansas chalk samples saturated with brine (1.1 M/64284 ppm NaCl) and an oil mixture (60% - 40% by volume of Heidrun oil and heptane) were aged at a constant temperature of 90oC with aging time as the laboratory control variable. A multimodal method incorporating contact angle measurements, wettability index via USBM test, and SEM-MLA analysis was applied in evaluating wettability. A systematic approach was applied with the three different methods to quantify the degree of uncertainty linked to a) wettability estimation and b) the aging procedure to control wettability alteration of Kansas chalk. With a comprehensive suite of samples, we were successfully able to alter the wettability of chalk cores.