US 12,227,692 B1
Composite gels for water shutoff in fractured reservoirs
Ayman Almohsin, Dhahran (SA); Bader Ghazi Alharbi, Dammam (SA); and Saad Almutari, Dammam (SA)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed on Aug. 8, 2023, as Appl. No. 18/446,404.
Int. Cl. C09K 8/504 (2006.01); C09K 8/508 (2006.01); E21B 33/138 (2006.01)
CPC C09K 8/5083 (2013.01) [C09K 8/504 (2013.01); E21B 33/138 (2013.01); C09K 2208/10 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A composition comprising:
a colloidal solution comprising a solvent, a plurality of silica nanoparticles dispersed in the solvent;
an activator dissolved in the colloidal solution, where the activator is selected from the group consisting of sodium silicate, sodium chloride, and potassium chloride; and
a plurality of gel particles suspended in the colloidal solution,
wherein the activator activates gelation of the colloidal solution under formation conditions, forming a composite gel comprising the plurality of gel particles, and
wherein the composite gel exhibits an elasticity ranging from 20,000 to 30,000 Pa.