US 12,332,197 B2
Systems and methods for determining surfactant impact on reservoir wettability
Hesham F. El-Sobky, Houston, TX (US); Ronald J. M. Bonnie, Houston, TX (US); and Tianmin Jiang, Houston, TX (US)
Assigned to ConocoPhillips Company, Houston, TX (US)
Filed by ConocoPhillips Company, Houston, TX (US)
Filed on Nov. 16, 2022, as Appl. No. 17/988,517.
Claims priority of provisional application 63/279,807, filed on Nov. 16, 2021.
Prior Publication US 2023/0152255 A1, May 18, 2023
Int. Cl. G01N 24/08 (2006.01); G01V 3/32 (2006.01)
CPC G01N 24/081 (2013.01) [G01V 3/32 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for determining surfactant impact on reservoir wettability, the method comprising:
obtaining a sample from a reservoir;
increasing a temperature and a pressure to generate simulated reservoir conditions;
obtaining a nuclear magnetic resonance T1 measurement of the sample, the nuclear magnetic resonance T1 measurement being captured under the simulated reservoir conditions;
obtaining a nuclear magnetic resonance T2 measurement of the sample upon imbibing the sample with surfactant, the nuclear magnetic resonance T2 measurement being captured under the simulated reservoir conditions;
generating a fluid typing map using the nuclear magnetic resonance T1 measurement and the nuclear magnetic resonance T2 measurement; and
determining an impact of the surfactant on fluid producibility based on the fluid typing map.