High Density Aqueous Well Fluids

Patent metadata

Field	Value
Publication number	US-2020181471-A1
Application number	US-202016789749-A
Country	US
Kind code	A1
Filing date	Feb 13, 2020
Priority date	Aug 13, 2014
Publication date	Jun 11, 2020
Grant date	—

Abstract

This invention provides zinc-free aqueous brine compositions. These zinc-free aqueous brine compositions have a density of about 14.3 pounds per gallon or more, and a true crystallization temperature of about 20° F. or less, and comprise water and one or more inorganic bromide salts, with the provisos that
when calcium bromide is present, one or more other water-soluble inorganic salts are also present, when lithium bromide is present, calcium bromide is absent, when bismuth(III) bromide is present, one or more other water-soluble inorganic salts are also present, and for a true crystallization temperature of about 10° F. or less, when manganese(II) bromide is present, one or more other water-soluble inorganic salts are also present.

Processes for forming these zinc-free aqueous brine compositions are also provided.

First claim

That which is claimed is:

1 . A wellbore fluid comprising a zinc-free aqueous brine having a density of 1.71 kg/L (14.3 pounds per gallon) or more, and a true crystallization temperature of −6.7° C. (20° F.) or less, which aqueous brine comprises calcium bromide and a manganese salt selected from manganese(II) bromide, manganese(II) nitrate, and manganese polytungstate.

2 . A wellbore fluid of claim 1 wherein the manganese salt is manganese(II) bromide.

3 . A wellbore fluid of claim 1 in which the aqueous brine has a density of 1.75 kg/L (14.6 pounds per gallon) or more.

4 . A wellbore fluid of claim 2 in which the aqueous brine has a density of 1.75 kg/L (14.6 pounds per gallon) or more and a pH value in the range of 2.5 to 5.

5 . A wellbore fluid of claim 2 also comprising tin(IV) bromide, wherein the aqueous brine has a density of 1.80 kg/L (15.0 pounds per gallon) or more.

6 . A wellbore fluid of claim 2 also comprising bismuth(III) bromide, and wherein the aqueous brine has a density of 1.92 kg/L (16.0 pounds per gallon) or more.

7 . A wellbore fluid of claim 2 also comprising tin(II) bromide or indium(III) bromide.

8 . A wellbore fluid of claim 2 which also comprises
tin(II) bromide, wherein the aqueous brine has a density of 1.80 kg/L (15.0 pounds per gallon) or more; or
indium(III) bromide, wherein the aqueous brine has a density of 1.92 kg/L (16.0 pounds per gallon) or more.

9 . A process for forming a wellbore fluid comprising a zinc-free aqueous brine having a density of 1.71 kg/L (14.3 pounds per gallon) or more, and a true crystallization temperature of −6.7° C. (20° F.) or less, which process comprises mixing, in any order, components comprising water, calcium bromide and a manganese salt selected from manganese(II) bromide, manganese(II) nitrate, and manganese polytungstate.

10 . A process of claim 9 wherein the manganese salt is manganese(II) bromide.

11 . A process of claim 9 in which the aqueous brine has a density of 1.75 kg/L (14.6 pounds per gallon) or more.

12 . A process of claim 10 in which the aqueous brine has a density of 1.75 kg/L (14.6 pounds per gallon) or more and a pH value in the range of 2.5 to 5.

13 . A process of claim 10 wherein the aqueous brine also comprises tin(IV) bromide, wherein the aqueous brine has a density of 1.80 kg/L (15.0 pounds per gallon) or more.

14 . A process of claim 10 wherein the aqueous brine also comprises bismuth(III) bromide, and wherein the aqueous brine has a density of 1.92 kg/L (16.0 pounds per gallon) or more.

15 . A process of claim 10 wherein the aqueous brine also comprises tin(II) bromide or indium(III) bromide.

16 . A process of claim 10 wherein the aqueous brine also comprises
tin(II) bromide, wherein the aqueous brine has a density of 1.80 kg/L (15.0 pounds per gallon) or more; or
indium(III) bromide, wherein the aqueous brine has a density of 1.92 kg/L (16.0 pounds per gallon) or more.

17 . A method of treating a wellbore, said method comprising:
introducing into the wellbore a wellbore fluid comprising a zinc-free aqueous brine having a density of 1.71 kg/L (14.3 pounds per gallon) or more, and a true crystallization temperature of −6.7° C. (20° F.) or less, which fluid comprises calcium bromide and a manganese salt selected from manganese(II) bromide, manganese(II) nitrate, and manganese polytungstate.

18 . A method of claim 17 wherein the manganese salt is manganese(II) bromide.

19 . A method of claim 17 in which the aqueous brine has a density of 1.75 kg/L (14.6 pounds per gallon) or more.

20 . A method of claim 18 in which the aqueous brine has a density of 1.75 kg/L (14.6 pounds per gallon) or more and a pH value in the range of 2.5 to 5.

21 . A method of claim 18 wherein the aqueous brine also comprises tin(IV) bromide, and wherein the aqueous brine has a density of 1.80 kg/L (15.0 pounds per gallon) or more.

22 . A method of claim 18 wherein the aqueous brine also comprises bismuth(III) bromide, and wherein the aqueous brine has a density of 1.92 kg/L (16.0 pounds per gallon) or more.

23 . A method of claim 18 wherein the aqueous brine also comprises tin(II) bromide or indium(III) bromide.

24 . A method of claim 18 wherein the aqueous brine also comprises
tin(II) bromide, wherein the aqueous brine has a density of 1.80 kg/L (15.0 pounds per gallon) or more; or
indium(III) bromide, wherein the aqueous brine has a density of 1.92 kg/L (16.0 pounds per gallon) or more.

Assignees

• Albemarle Corp

Inventors

• Nalepa Christopher J
• Louwen Jacobus N
• Liu Yunqi
• Lambeth Gregory H
• Godavarthy Srinivasa S
• Coppola Kevin

Classifications

• C02F1/00

  Treatment of water, waste water, or sewage (C02F3/00 - C02F9/00 take precedence) · CPC title

• C09K8/05 Primary

  containing inorganic compounds only, e.g. mixtures of clay and salt · CPC title