Treatment fluids for use in removing acid-soluble materials in subterranean formations

Patent metadata

Field	Value
Publication number	US-9745506-B2
Application number	US-201515100863-A
Country	US
Kind code	B2
Filing date	Jun 1, 2015
Priority date	Jun 1, 2015
Publication date	Aug 29, 2017
Grant date	Aug 29, 2017

Abstract

Treatment fluids comprising methane sulfonic acid (MSA) and fully protonated N-(phosphonomethyl)iminodiacetic acid (PMIDA) solubilized in the MSA. Methods including introducing the treatment fluids into a wellbore in a subterranean formation comprising acid-soluble material at a first treatment interval, and reacting the MSA and the PMIDA in the treatment fluid with the acid-soluble material at a temperature in the range of about 65° C. to about 210° C., wherein the reacting removes the acid-soluble material, thereby forming conductive channels in the subterranean formation.

First claim

The invention claimed is:

1. A method comprising:
introducing a treatment fluid into a wellbore in a subterranean formation comprising acid-soluble material at a first treatment interval,
wherein the treatment fluid comprises methane sulfonic acid (MSA) and fully protonated N-(phosphonomethyl)iminodiacetic acid (PMIDA) at least partially solubilized in the MSA; and
reacting the MSA and the PMIDA in the treatment fluid with the acid-soluble material at a temperature in the range of about 65° C. to about 210° C., wherein the reacting removes the acid-soluble material, thereby forming conductive channels in the subterranean formation.

2. The method of claim 1 , wherein an initial pH of the treatment fluid is less than about 1.9.

3. The method of claim 1 , wherein the MSA reacts with the acid-soluble material before the PMIDA reacts with the acid-soluble material, and the PMIDA does not react with the acid-soluble material until the MSA has spent sufficiently to cause the pH of the treatment fluid to rise to greater than about 2.0.

4. The method of claim 1 , wherein the PMIDA reacts with the acid-soluble material in a far-field region of the subterranean formation away from a face of the wellbore as compared to the MSA.

5. The method of claim 1 , wherein the acid-soluble material is a carbonate material, scale, a sulfate material, an iron oxide, a manganese oxide, and any combination thereof.

6. The method of claim 1 , wherein the PMIDA is present in the treatment fluid in a ratio to the MSA (PMIDA:MSA) in an amount in the range of about 1:5 to about 45:80.

7. The method of claim 1 , wherein the treatment fluid further comprises an aqueous base fluid in an amount in the range of 0.2% to about 30% by volume of the MSA.

8. The method of claim 1 , wherein the treatment fluid further comprises an additive selected from the group consisting of a weighting agent, an inert solid, a fluid loss control agent, a salt, an emulsifier, a dispersion aid, a corrosion inhibitor, an emulsion thinner, an emulsion thickener, a viscosifying agent, a gelling agent, a surfactant, a particulate, a proppant, a gravel particulate, a lost circulation material, a foaming agent, a gas, a pH control additive, a breaker, a biocide, a crosslinker, a stabilizer, a chelating agent, a scale inhibitor, a gas hydrate inhibitor, a mutual solvent, an oxidizer, a reducer, a friction reducer, a clay stabilizing agent, silica scale control additive, a gel stabilizer, an anti-oxidant, a polymer degradation prevention additive, a relative permeability modifier, a defoaming agent, an antifoaming agent, an iron control agent, a particulate diverter, an acid, a catalyst, a flocculant, a scavenger, a lubricant, a bridging agent, a solubilizer, a consolidating agent, a bactericide, and the like, and any combination thereof.

9. The method of claim 1 , wherein the treatment fluid is introduced into the wellbore in the subterranean formation at a rate and pressure sufficient to create or enhance a fracture therein, and wherein the step of reacting the MSA and the PMIDA with the acid-soluble material includes reacting with acid-soluble material on a face of the fracture.

10. The method of claim 1 , further comprising introducing a pre-flush fluid into the wellbore in the subterranean formation prior to the step of introducing the treatment fluid therein.

11. The method of claim 1 , further comprising introducing a post-flush fluid into the wellbore in the subterranean formation after the step of reacting the MSA and the PMIDA with the acid-soluble material.

12. A system comprising:
a tubular extending into a wellbore in a subterranean formation comprising acid-soluble material; and
a pump fluidly coupled to the tubular, the tubular containing a treatment fluid comprising:
methane sulfonic acid (MSA) and fully protonated N-(phosphonomethyl)iminodiacetic acid (PMIDA) at least partially solubilized in the MSA, the treatment fluid at a temperature in the range of about 65° C. to about 210° C.

13. The system of claim 12 , wherein the acid-soluble material is a carbonate material, scale, a sulfate material, an iron oxide, a manganese oxide, and any combination thereof.

14. The system of claim 12 , wherein the PMIDA is present in the treatment fluid in a ratio to the MSA (PMIDA:MSA) in an amount in the range of about 1:5 to about 45:80.

15. The system of claim 12 , wherein the treatment fluid further comprises an aqueous base fluid in an amount in the range of 0.2% to about 30% by volume of the MSA.

16. The system of claim 12 , wherein the treatment fluid further comprises an additive selected from the group consisting of a weighting agent, an inert solid, a fluid loss control agent, a salt, an emulsifier, a dispersion aid, a corrosion inhibitor, an emulsion thinner, an emulsion thickener, a viscosifying agent, a gelling agent, a surfactant, a particulate, a proppant, a gravel particulate, a lost circulation material, a foaming agent, a gas, a pH control additive, a breaker, a biocide, a crosslinker, a stabilizer, a chelating agent, a scale inhibitor, a gas hydrate inhibitor, a mutual solvent, an oxidizer, a reducer, a friction reducer, a clay stabilizing agent, silica scale control additive, a gel stabilizer, an anti-oxidant, a polymer degradation prevention additive, a relative permeability modifier, a defoaming agent, an antifoaming agent, an iron control agent, a particulate diverter, an acid, a catalyst, a flocculant, a scavenger, a lubricant, a bridging agent, a solubilizer, a consolidating agent, a bactericide, and the like, and any combination thereof.

17. A method comprising:
introducing a treatment fluid into a wellbore in a subterranean formation comprising acid-soluble material at a first treatment interval,
wherein the treatment fluid comprises methane sulfonic acid (MSA) and fully protonated N-(phosphonomethyl)iminodiacetic acid (PMIDA) at least partially solubilized in the MSA, wherein the PMIDA is present in the treatment fluid in a ratio to the MSA (PMIDA:MSA) in an amount in the range of about 1:5 to about 45:80; and
reacting the MSA and the PMIDA in the treatment fluid with the acid-soluble material.

18. The method of claim 17 , wherein an initial pH of the treatment fluid is less than about 1.9.

19. The method of claim 17 , wherein the treatment fluid further comprises an aqueous base fluid in an amount in the range of 0.2% to about 30% by volume of the MSA.

20. The method of claim 17 , wherein the treatment fluid further comprises an additive selected from the group consisting of a weighting agent, an inert solid, a fluid loss control agent, a salt, an emulsifier, a dispersion aid, a corrosion inhibitor, an emulsion thinner, an emulsion thickener, a viscosifying agent, a gelling agent, a surfactant, a particulate, a proppant, a gravel particulate, a lost circulation material, a foaming agent, a gas, a pH control additive, a breaker, a biocide, a crosslinker, a stabilizer, a chelating agent, a scale inhibitor, a gas hydrate inhibitor, a mutual solvent, an oxidizer, a reducer, a friction reducer, a clay stabilizing agent, silica scale control additive, a gel stabilizer, an anti-oxidant, a polymer degradation prevention additive, a relative permeability modifier, a defoaming agent, an antifoaming agent, an iron control agent, a particulate diverter, an acid, a catalyst, a flocculant, a scavenger, a lubricant, a bridging agent, a solubilizer, a consolidating agent, a bactericide, and the like, and any combination thereof.

Assignees

• Halliburton Energy Services Inc

Inventors

• Reyes Enrique Antonio
• Beuterbaugh Aaron M
• Lablanc Alyssa Lynn

Classifications

• C09K8/58

  Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids · CPC title

• C09K8/035

  Organic additives · CPC title

• E21B43/25

  Methods for stimulating production {(by vibrating earth formations E21B43/003)} · CPC title

• C09K8/42

  Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells (compositions for plastering C09K8/50) · CPC title

• C09K8/72 Primary

  Eroding chemicals, e.g. acids · CPC title