Stabilization and reduction of TCT of brines containing monovalent iodides

Patent metadata

Field	Value
Publication number	US-11261362-B2
Application number	US-202017083757-A
Country	US
Kind code	B2
Filing date	Oct 29, 2020
Priority date	Oct 24, 2017
Publication date	Mar 1, 2022
Grant date	Mar 1, 2022

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.

First claim

What is claimed is:

1. A method of using a stabilized monovalent iodide brine during a wellbore activity, the method comprising the steps of:
introducing the stabilized monovalent iodide brine into a wellbore, the stabilized monovalent iodide brine comprising:
a monovalent salt system, where 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; and
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,
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,
where the stabilized monovalent iodide brine is a clear brine; and

completing the wellbore activity.

2. The method of claim 1 , where the wellbore activity is selected from the group consisting of drilling, reservoir drilling, completion activities, workover activities, well intervention activities, or as a packer fluid.

3. The method of claim 1 , wherein the monovalent iodide is selected from the group consisting of lithium iodide, sodium iodide, potassium iodide, cesium iodide, rubidium iodide, and combinations of the same.

4. The method of claim 1 , wherein the monovalent iodide is present in the range between 1 wt % and 70 wt %.

5. The method of claim 1 , wherein the low molecular weight polyol is selected from the group consisting of sorbitol, glycerol, xylitol, mannitol, diglycerol, polyethylene glycol with a molecular weight less than 1000 Da, and combinations of the same.

6. The method of claim 1 , wherein the monovalent salt system further comprises an additional halide.

7. The method of claim 6 , wherein the additional halide is selected from the group consisting of a divalent halide, a monovalent halide, and combinations of the same.

8. The method of claim 6 , wherein the additional halide comprises a monovalent halide selected from the group consisting of lithium bromide, lithium chloride, sodium bromide, sodium chloride, potassium bromide, potassium chloride, cesium bromide, cesium chloride, rubidium bromide, rubidium chloride, and combinations of the same.

9. The method of claim 6 , wherein the additional halide comprises a divalent halide selected from the group consisting of calcium bromide, calcium chloride, calcium iodide, magnesium bromide, magnesium chloride, magnesium iodide, strontium bromide, strontium chloride, strontium iodide, and combinations of the same.

10. The method of claim 6 , wherein the monovalent iodide is present in the range between 1 wt % and 70 wt % of the stabilized monovalent iodide brine, and further wherein the additional halide is present in the range between 1 wt % and 45 wt %.

11. The method of claim 1 , 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.

12. The method of claim 1 , wherein the amino alcohols are selected from the group consisting of monoethanolamine (MEA), diethanolamine (DEA), triethanolamine (TEA), diethylaminoethanol (DEAE), dimethylethanolamine (DMEA), N-[3-aminopropyl]diethanolamine, aminoethylethanolamine (AEEA), 4-[2-hydroxyethyl]morpholine, diglycolamine, and combinations of the same.

13. The method of claim 1 , wherein the hydroxylamines are selected from the group consisting of diethylhydroxylamine (DEHA), dimethylhydroxylamine (DMHA), hydroxylamine, and combinations of the same.

14. The method of claim 1 , wherein the erythorbate salts comprises sodium erthyorbate.

15. The method of claim 1 , wherein the ascorbate salts are selected from the group consisting of sodium ascorbate, potassium ascorbate, magnesium ascorbate, calcium ascorbate and combinations of the same.

16. The method of claim 1 , wherein the citrate salts are selected from the group consisting of mono-, di-, and tri-sodium citrate, potassium citrate, magnesium citrate, calcium citrate, and combinations of the same.

Assignees

• Tetra Tech

Inventors

• Mack Arthur G
• Fowler Drew A

Classifications

• C09K8/032 Primary

  Inorganic additives · CPC title

• C09K8/575

  containing organic compounds · CPC title

• C09K8/06 Primary

  Clay-free compositions (containing inorganic compounds only C09K8/05) · CPC title