Additives to suppress silica scale build-up and methods of use thereof
First Claim
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1. A method comprising:
- providing an acidic treatment fluid comprising;
a base fluid,an acid, anda silica scale control additive;
wherein the silica scale control additive comprises at least one substance selected from the group consisting of a polyaminoamide dendrimer, a polyethyleneimine, a carboxymethylinulin, a polyacrylate, a polyallylamine, a copolymer of polyacrylamide, a polyallyldimethylammonium chloride, any combination thereof, and any derivative thereof;
contacting at least a portion of a subterranean formation with the acidic treatment fluid in a remedial operation; and
allowing the acidic treatment fluid to interact with silica scale buildup in the subterranean formation so that at least a portion of the silica scale buildup is removed and a concentration of soluble silica in the treatment fluid is about 500 mg/L or more by weight after interacting with the silica scale buildup, whereby precipitation of new silica scale buildup from the treatment fluid is suppressed by the silica scale control additive.
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Abstract
Treatments and compounds for use in subterranean formations where surfaces may be subject to silica scale build-up. Certain embodiments pertain to utilizing silica scale control additives with remediation and stimulation treatments. One example of a suitable method of treatment includes providing an acidic treatment fluid comprising: a base fluid, an acid, and a silica scale control additive; contacting at least a portion of a subterranean formation with the acidic treatment fluid; and allowing the acidic treatment fluid to interact with silica scale buildup in the subterranean formation so that at least a portion of the silica scale buildup is removed.
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Citations
13 Claims
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1. A method comprising:
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providing an acidic treatment fluid comprising; a base fluid, an acid, and a silica scale control additive; wherein the silica scale control additive comprises at least one substance selected from the group consisting of a polyaminoamide dendrimer, a polyethyleneimine, a carboxymethylinulin, a polyacrylate, a polyallylamine, a copolymer of polyacrylamide, a polyallyldimethylammonium chloride, any combination thereof, and any derivative thereof; contacting at least a portion of a subterranean formation with the acidic treatment fluid in a remedial operation; and allowing the acidic treatment fluid to interact with silica scale buildup in the subterranean formation so that at least a portion of the silica scale buildup is removed and a concentration of soluble silica in the treatment fluid is about 500 mg/L or more by weight after interacting with the silica scale buildup, whereby precipitation of new silica scale buildup from the treatment fluid is suppressed by the silica scale control additive. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method comprising:
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providing a treatment fluid comprising a base fluid and a silica scale control additive; wherein the silica scale control additive has a concentration in the base fluid ranging between about 0.1% to about 5% by weight and comprises at least one substance selected from the group consisting of a polyaminoamide dendrimer, a polyethyleneimine, a carboxymethylinulin, a polyacrylate, a polyallylamine, a copolymer of polyacrylamide, a polyallyldimethylammonium chloride, any combination thereof, and any derivative thereof; introducing the treatment fluid into at least a portion of a subterranean formation in a remedial operation; and suppressing precipitation of silica scale in the subterranean formation with the silica scale control additive at a soluble silicon concentration of about 500 mg/L or above. - View Dependent Claims (8, 9, 10)
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11. A method for reducing silica scale buildup in a subterranean formation, the method comprising:
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placing an acidic treatment fluid comprising a base fluid and a silica scale control additive in the subterranean formation; wherein the silica scale control additive comprises at least one substance selected from the group consisting of a polyaminoamide dendrimer, a polyethyleneimine, a carboxymethylinulin, a polyacrylate, a polyallylamine, a copolymer of polyacrylamide, a polyallyldimethylammonium chloride, any combination thereof, and any derivative thereof; and forming soluble silica in the subterranean formation in a remedial operation; wherein a concentration of soluble silica in the treatment fluid is about 500 mg/L or more by weight after forming the soluble silica, and precipitation of new silica scale buildup from the treatment fluid is suppressed by the silica scale control additive. - View Dependent Claims (12, 13)
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Specification