Removal of a mineral phase from a surface associated with a wellbore

Patent metadata

Field	Value
Publication number	US-2022017812-A1
Application number	US-202016932687-A
Country	US
Kind code	A1
Filing date	Jul 17, 2020
Priority date	Jul 17, 2020
Publication date	Jan 20, 2022
Grant date	—

Abstract

The compositions for removing a mineral phase from a surface composition for removing a mineral phase of inorganic sulfate scale include a phosphonoalkyl aminopolycarboxylic acid chelating agent; a wettability modifier comprises a dibasic ester and a surfactant, wherein the surfactant comprises one or more of an anionic alkyl sulfonate or an anionic aryl sulfonate; a pH-adjusting agent; a scale converting agent; and water. The methods for removing a mineral phase from a surface include contacting the mineral phase with an aqueous dissolver fluid that is one of the present compositions; and removing the oil wet mineral phase from the surface with the aqueous dissolver fluid. The compositions and methods provide enhanced remediation of mineral phases from surfaces associated with wellbores.

First claim

What is claimed is:

1 . A method of removing an oil wet mineral phase comprising an inorganic sulfate from a surface, comprising:
contacting the mineral phase with an aqueous dissolver fluid comprising a phosphonoalkyl aminopolycarboxylic acid chelating agent, a wettability modifier, a pH-adjusting agent, a scale converting agent and water, wherein the wettability modifier comprises a dibasic ester and a surfactant, wherein the surfactant comprises one or more of an anionic alkyl sulfonate or an anionic aryl sulfonate; and removing the oil wet mineral phase from the surface with the aqueous dissolver fluid.

2 . The method of claim 1 , further comprising removing a hydrocarbon phase from a surface of the mineral phase with the aqueous dissolver fluid.

3 . The method of claim 2 , wherein the mineral phase is contacted with the aqueous dissolver fluid only in a single step dissolving process.

4 . The method of claim 1 , wherein at least 50% of the mineral phase is removed within between 0.5 and 72 hours.

5 . The method of claim 4 , wherein at least 50% of the mineral phase is removed within between 0.5 and 8 hours.

6 . The method of claim 1 , wherein the mineral phase comprises calcium sulfate.

7 . The method of claim 1 , wherein the surfactant comprises an anionic alkyl sulfonate.

8 . The method of claim 7 , wherein the anionic alkyl sulfonate comprises a linear alkyl benzene sulfonate.

9 . The method of claim 1 , wherein the dibasic ester is selected from the group consisting of dimethyl 2-methylglutarate, 1-dodecyl-2-pyrrolidinone, N—(C 2 H 4 )—CH 3 -pyrrolidinone wherein n is from about 6 to about 12, dimethyl succinate, dimethyl glutarate, dimethyl adipate, dimethyl-2-methyl adipate and combinations thereof.

10 . The method of claim 9 , wherein the dibasic ester comprises dimethyl 2-methylglutarate.

11 . The method of claim 1 , wherein the phosphonoalkyl aminopolycarboxylic acid chelating agent comprises a phosphorylated aminopolycarboxylic acid.

12 . The method of claim 11 , wherein the phosphorylated aminopolycarboxylic acid comprises PMIDA.

13 . The method of claim 1 , further comprising:
removing a hydrocarbon phase from the mineral phase with the aqueous dissolver fluid; wherein the mineral phase is contacted with the aqueous dissolver fluid only in a single step dissolving process; wherein at least 50% of the mineral phase is removed within between 0.5 and 8 hours; wherein the mineral phase comprises calcium sulfate; wherein the anionic salt comprises a linear alkyl benzene sulfonate surfactant; wherein the wettability modifier further comprises a solvent comprising dimethyl 2-methylglutarate; and wherein the phosphonoalkyl aminopolycarboxylic acid chelating agent comprises PMIDA.

14 . A dissolver composition for removing a mineral phase of inorganic sulfate scale, comprising:
a phosphonoalkyl aminopolycarboxylic acid chelating agent; a wettability modifier comprises a dibasic ester and a surfactant, wherein the surfactant comprises one or more of an anionic alkyl sulfonate or an anionic aryl sulfonate; a pH-adjusting agent; a scale converting agent; and water.

15 . The dissolver composition of claim 14 , wherein the surfactant comprises an anionic alkyl sulfonate.

16 . The dissolver composition of claim 15 , wherein the anionic alkyl sulfonate comprises a linear alkyl benzene sulfonate.

17 . The dissolver composition of claim 14 , the dibasic ester is selected from the group consisting of dimethyl 2-methylglutarate, 1-dodecyl-2-pyrrolidinone, N—(C 2 H 4 )—CH 3 -pyrrolidinone (wherein n is from about 6 to about 12), dimethyl succinate, dimethyl glutarate, dimethyl adipate, dimethyl-2-methyl adipate and combinations thereof.

18 . The dissolver composition of claim 17 , wherein the dibasic ester comprises dimethyl 2-methylglutarate.

19 . The dissolver composition of claim 14 , wherein the phosphonoalkyl aminopolycarboxylic acid chelating agent comprises a phosphorylated aminopolycarboxylic acid.

20 . The dissolver composition of claim 19 , wherein the phosphorylated aminopolycarboxylic acid comprises PMIDA.

Assignees

• Halliburton Energy Services Inc

Inventors

• Reyes Enrique A
• Holan Kristina H
• Recio Antonio

Classifications

• C09K8/524 Primary

  organic depositions, e.g. paraffins or asphaltenes · CPC title

• C09K8/528

  inorganic depositions, e.g. sulfates or carbonates · CPC title

• C09K8/06

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

• C09K8/532 Primary

  Sulfur · CPC title