Stabilization and reduction of TCT of brines containing monovalent iodides
AssigneeTetra Technologies, Inc.
InventorsArthur G. Mack, Drew A. Fowler
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Abstract
A composition for use in a wellbore activity, the composition comprising a stabilized monovalent iodide brine, the stabilized monovalent iodide brine comprises a monovalent salt system, the monovalent salt system comprises a monovalent iodide; a primary iodide stabilizer, the primary iodide stabilizer operable to remove free iodine, prevent the formation of free iodine, and suppress TCT; and an aqueous fluid, where the stabilized monovalent iodide brine has a density greater than 10 lb/gal, where the stabilized monovalent iodide brine has a TCT of less than or equal to 70 deg F.
Claims12
A composition of a clear brine for use in a wellbore activity, the composition of a clear brine comprising:
- a stabilized monovalent iodide brine, the stabilized monovalent iodide brine comprises:
- a monovalent salt system, the monovalent salt system comprises a monovalent iodide;
- a primary iodide stabilizer, an amount of primary iodide stabilizer operable to remove free iodine, prevent the formation of free iodine, and suppress TCT, wherein the primary iodide stabilizer comprises a low molecular weight polyol, wherein the amount of the primary iodide stabilizer is present in the range between 1 wt % and 30 wt % of the stabilized monovalent iodide brine;
- a secondary iodide stabilizer, wherein the secondary iodide stabilizer is present in an amount in the range between 0.001% v/v and 5% v/v, wherein the amount of the secondary iodide stabilizer is operable to stabilize the primary iodide stabilizer, wherein the secondary iodide stabilizer is selected from the group consisting of amines, amino alcohols, hydroxylamines, hydrazines, erythorbic acid and erythorbate salts, ascorbic acid and ascorbate salts, citric acid and citrate salts, and combinations of the same,
- wherein the amines are selected from the group consisting of ethylenediamine (EDA), diethylenetriamine (DETA), triethylenetetramine (TETA), tetraethylenepentamine (TEPA), pentaethylenehexamine (PEHA), aminoethylpiperazine (AEP), hexaethyleneheptamine (HEHA), piperazine, diethylhydroxylamine (DEHA), methoxypropylamine (MOPA), morpholine, n-aminopropylmorpholine (APM) and combinations thereof, wherein the amino alcohols are selected from the group consisting of monoethanolamine (MEA), diethanolamine (DEA), triethanolamine (TEA), diethylaminoethanol (DEAE), dimethylethanolamine (DMEA), aminoethylethanolamine (AEEA), 4-[2-hydroxyethyl] morpholine, diglycolamine, and combinations of the same;
- and
- an aqueous fluid, the aqueous fluid present in the range between 20 wt % and 55 wt % of the stabilized monovalent iodide brine;
- where the stabilized monovalent iodide brine has a density between 12.5 lb/gal and 16 lb/gal.
A method of creating a stabilized monovalent iodide clear brine, the method comprising the steps of:
- adding an amount of a monovalent salt system to aqueous fluid, where the monovalent salt system comprises a monovalent iodide;
- and
- adding an amount between 1 wt % and 30 wt % of a primary iodide stabilizer, wherein the primary iodide stabilizer comprises a low molecular weight polyol;
- adding an amount between 0.001% v/v and 5% v/v of a secondary iodide stabilizer, wherein the secondary iodide stabilizer is selected from the group consisting of amines, amino alcohols, hydroxylamines, hydrazines, erythorbic acid and erythorbate salts, ascorbic acid and ascorbate salts, citric acid and citrate salts, and combinations of the same, wherein the amines are selected from the group consisting of ethylenediamine (EDA), diethylenetriamine (DETA), triethylenetetramine (TETA), tetraethylenepentamine (TEPA), pentaethylenehexamine (PEHA), aminoethylpiperazine (AEP), hex aethyleneheptamine (HEHA), piperazine, diethylhydroxylamine (DEHA), methoxypropylamine (MOPA), morpholine, n-aminopropylmorpholine (APM) and combinations thereof, wherein the amino alcohols are selected from the group consisting of monoethanolamine (MEA), diethanolamine (DEA), triethanolamine (TEA), diethylaminoethanol (DEAE), dimethylethanolamine (DMEA), aminoethylethanolamine (AEEA), 4-[2-hydroxyethyl]morpholine, diglycolamine, and combinations of the same.
Dependencies are inferred from the claim text.