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AssigneeSaudi Arabian Oil Company
InventorsManar A. Alahmari, Abdulmohsen A. Al-Humam, Mohammed A. Bataweel
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Methods for treating a formation may include introducing components of a treatment solution into a wellbore such that the treatment solution contacts the formation to be treated, where the treatment solution may include urea, urease, a calcium ion source, one or more polysaccharides, a casein protein, a protease, an ionic compound, and a sugar, where the formation may have an amount of sand production before treatment and may be in fluid contact with the wellbore, and where an amount of sand production after treatment may be less than the amount of sand production before treatment. Consolidated sand structure compositions may include previously unconsolidated sand interlinked by inter-particle cementitious bonds comprising deposited calcium carbonate crystals, where the consolidated sand has a structural strength and the consolidated sand structure is porous to permit fluid flow through the composition.
A treatment solution comprising a mixture of urea, urease, a calcium ion source, one or more polysaccharides, a casein protein, a protease, an ionic compound, and a sugar in an aqueous solution, wherein the protease is selected from the group consisting of Aspergillus niger, Aspergillus oryzae, and combinations thereof.
A consolidated sand structure composition, the composition comprising previously unconsolidated sand interlinked by inter-particle cementitious bonds comprising deposited calcium carbonate crystals formed at a temperature in a range of from 70° C. to 100° C. in the presence of a treatment solution comprising a mixture of urea, urease, a calcium ion source, one or more polysaccharides, a casein protein, a protease, an ionic compound, and a sugar in an aqueous solution,
Dependencies are inferred from the claim text.