US 12,442,295 B2
Application of ToF-SIMS for analysis of formation fluid samples and formation rock samples
Bastian Sauerer, Houston, TX (US); and Wael Abdallah, Dhahran (SA)
Assigned to Schlumberger Technology Corporation, Sugar Land, TX (US)
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
Filed on Dec. 13, 2022, as Appl. No. 18/065,066.
Prior Publication US 2024/0191623 A1, Jun. 13, 2024
Int. Cl. E21B 49/08 (2006.01); G01N 23/2258 (2018.01); G01N 33/24 (2006.01); E21B 49/10 (2006.01)
CPC E21B 49/0875 (2020.05) [G01N 23/2258 (2013.01); G01N 33/241 (2013.01); E21B 49/10 (2013.01)] 28 Claims
OG exemplary drawing
 
1. A method for subsurface characterization, comprising:
obtaining a formation fluid sample;
extracting an oil-water interface from the formation fluid sample;
preparing a solid-phase test sample from the oil-water interface extracted from the formation fluid sample;
configuring a time-of-flight secondary ion mass spectrometry instrument to analyze the solid-phase test sample to determine a mass spectrum of the solid-phase test sample; and
processing the mass spectrum of the solid-phase test sample to determine at least one property of the oil-water interface of the formation fluid sample,
wherein the solid-phase test sample includes surface-active species and solid adsorbed species of the oil-water interface, and
wherein the preparing the solid-phase test sample involves heating or drying the oil-water interface extracted from the formation fluid sample.