US 11,906,417 B2
Restoring core samples
Ying Wang, Beijing (CN); Ming Han, Dhahran (SA); Dongqing Cao, Beijing (CN); and Jinxun Wang, Dhahran (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Jan. 5, 2022, as Appl. No. 17/569,141.
Prior Publication US 2023/0212943 A1, Jul. 6, 2023
Int. Cl. G01N 15/08 (2006.01); G01N 33/24 (2006.01)
CPC G01N 15/0826 (2013.01) [G01N 15/08 (2013.01); G01N 15/082 (2013.01); G01N 15/0806 (2013.01); G01N 15/088 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of at least partially restoring carbonate core samples, the method comprising:
extracting a carbonate core sample from a subterranean formation;
inserting the extracted carbonate core sample into a core flooding test machine;
measuring a first porosity and a first brine permeability of the extracted carbonate core sample;
pumping a fluid through the extracted carbonate core sample to flood the carbonate core sample, the fluid comprising at least one of a high-molecular weight polymer solution and a gel particle solution; and
at least partially restoring the porosity and the brine permeability of the carbonate core sample by:
pumping an oxidizing solution through the flooded carbonate core sample; and
heating the carbonate core sample to a first temperature of at least 60° C. after pumping the oxidizing solution through the carbonate core sample.