US 12,116,859 B2
Method for taking a core sample of a formation
Paul Joseph Tarabbia, Dhahran (SA); and Abdulmohsin Mansor, Aziziah (SA)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed on Jun. 29, 2022, as Appl. No. 17/809,759.
Application 17/809,759 is a division of application No. 16/913,610, filed on Jun. 26, 2020, granted, now 11,434,718.
Prior Publication US 2022/0325602 A1, Oct. 13, 2022
Int. Cl. E21B 25/08 (2006.01); C04B 24/32 (2006.01); C04B 26/06 (2006.01); C09K 8/02 (2006.01); C09K 8/34 (2006.01); C09K 8/42 (2006.01); C09K 8/44 (2006.01); E21B 21/08 (2006.01); E21B 33/138 (2006.01); E21B 49/00 (2006.01); C04B 103/00 (2006.01); C04B 103/22 (2006.01)
CPC E21B 33/138 (2013.01) [C04B 24/32 (2013.01); C04B 26/06 (2013.01); C09K 8/02 (2013.01); C09K 8/34 (2013.01); C09K 8/42 (2013.01); C09K 8/44 (2013.01); E21B 21/08 (2013.01); E21B 25/08 (2013.01); E21B 49/00 (2013.01); C04B 2103/0062 (2013.01); C04B 2103/22 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A method of taking a core sample of a formation, the method comprising:
reducing a viscosity of a water binding starting material in a pumping form, the water binding starting material comprising:
at least one polymer;
at least one cross linker capable of curing the at least one polymer; and
a retarder capable of delaying cross linking of the at least one polymer;
wherein at least one additive is added to the water binding starting material to reduce the viscosity of the water binding starting material to less than 2 times of a viscosity of water at a selected temperature;
pumping the water binding starting material into a borehole at a pumping pressure to inject the water binding starting material a distance into the formation from the borehole;
allowing the water binding starting material to cure in the formation; and
taking the core sample from the formation containing the cured water binding starting material.