公开(公告)号：US20210318259A1

公开(公告)日：2021-10-14

申请号：US16999242

申请日：2020-08-21

Applicant: CHEVRON U.S.A. INC.

Inventor： Martha Rebecca STOKES ,  Zheng YANG ,  Prince E. EZEBUIRO ,  Timothy B. FISCHER

IPC: G01N27/22 ,  G01N33/24 ,  E21B49/00

Abstract: Provided herein are various embodiments of determining a cation exchange capacity of a rock sample. One embodiment of a method of determining a cation exchange capacity of a rock sample comprises equilibrating the rock sample to a relative humidity, performing a dielectric permittivity measurement on the rock sample at the relative humidity, and determining a cation exchange capacity of the rock sample based on the dielectric permittivity measurement. One embodiment of a method of determining a cation exchange capacity of a rock sample comprises receiving a dielectric permittivity measurement on the rock sample, and determining a cation exchange capacity for the rock sample based on the dielectric permittivity measurement of the rock sample and a relationship between cation exchange capacity and dielectric permittivity measurements for mineral mixtures corresponding to a range of cation exchange capacity values.