Composite gels for water shutoff in fractured reservoirs
AssigneeSaudi Arabian Oil Company
InventorsAyman Almohsin, Bader Ghazi Alharbi, Saad Almutari
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Abstract
A composition includes a colloidal solution which includes a solvent, a plurality of nanoparticles dispersed in the solvent, an activator dissolved in the colloidal solution, and a plurality of gel particles suspended in the colloidal solution. A method for water shutoff includes injecting a composition into a fracture near a water zone in a formation, wherein the composition includes a colloidal solution which includes a solvent, a plurality of nanoparticles dispersed in the solvent, an activator dissolved in the solvent, and a plurality of gel particles suspended in the colloidal solution.
Claims18
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 composite gel exhibits an elasticity ranging from 20,000 to 30,000 Pa.
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A method for water shutoff in a formation comprising:
- injecting a composition into a fracture near a water zone in a formation wherein the composition comprises:
- a colloidal solution comprising a solvent, a plurality of silica nanoparticles dispersed in the solvent;
- an activator dissolved in the solvent, 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 composite gel exhibits an elasticity ranging from 20,000 to 30,000 Pa.
Dependencies are inferred from the claim text.