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US-12624276-B2 - Compositions and methods for the dissolution of iron sulfide

US12624276B2US 12624276 B2US12624276 B2US 12624276B2US-12624276-B2

Abstract

A method of reducing scale on a surface, the method including: contacting (i) one or more biochelants; (ii) one or more organophosphorus compound; (iii) an optional enhancer and (iv) a solvent with the surface having one or more deposits comprising iron sulfide. A composition comprising: (i) a biochelant; (ii) an organophosphorus compound; (iii) an optional enhancer and (iv) a solvent. A method of servicing a wellbore disposed in a subterranean formation including: placing into the wellbore a fluid comprising a biochelant; (ii) an organophosphorus compound; (iii) an optional enhancer; and (iv) a solvent for a time period sufficient to reduce a level of iron sulfide deposits by at least about 10% wherein the optional enhancer comprises an amino alcohol.

Inventors

  • Catherine Gonzalez
  • Jason Helander
  • Jun Su AN
  • Thomas Swanson
  • Jihye Kim
  • Kimchi Phan

Assignees

  • SOLUGEN, INC.

Dates

Publication Date
20260512
Application Date
20220425

Claims (19)

  1. 1 . A method of reducing scale on a surface comprising one or more deposits comprising iron sulfide, the method comprising: contacting the surface comprising the one or more deposits with a fluid comprising: (i) one or more biochelants present in an amount from about 10 wt. % to about 40 wt. % by weight of the fluid, wherein the one or more biochelants comprise an aldonic acid, a uronic acid, an aldaric acid, a glucose oxidation product, a gluconic acid oxidation product, a glucarate, a gluconate, glucaric acid, gluconic acid, glucuronic acid, galactonic acid, galactaric acid, or a combination thereof; (ii) one or more organophosphorus compounds present in an amount from about 10 wt. % to about 40 wt. % by weight of the fluid, wherein the organophosphorus compound is characterized by a general formula (OR) 4 P + [anion] where R is an alkyl; (iii) an enhancing chelant present in an amount from about 5 wt. % to about 40 wt. % by weight of the fluid, wherein the enhancing chelant comprises citric acid, ethylene diamine tetraacetic acid (EDTA), nitrilotriacetic acid (NTA), hydroxyethylidene diphosphonic acid (HEDTA), methylglycine N,N-diacetic acid trisodium salt (MGDA), N,N-dicarboxymethyl glutamic acid tetrasodium salt (GLDA), 1,10-phenanthroline, acetylacetone, aminomethylphosphonic acid, benzotriazole, benzoylacetone, bipyridine, 2,2′-bipyrimidine, 1,2-bis(dicyclohexylphosphino) ethane, 1,2-bis(dimethylphosphino) ethane, 1,2-bis(diphenylphosphino)benzene, 1,4-bis(diphenylphosphino) butane, 1,2-bis(diphenylphosphino)ethylene, bis(diphenylphosphinoethyl)phenylphosphine, 1,2-bis(diphenylphosphino)ethane, trans-1,2-diaminocyclohexane, 1,2-diaminopropane, tetramethylethylenediamine, 1,1,1-tris(diphenylphosphinomethyl)ethane, ethylenediamine-N,N′-disuccinic acid (EDDS), diethylenetriaminepentaacetic acid (DTPA), hydroxyethyliminodiacetate (HEIDA), 1,2-cyclohexylenedinitrilo tetraacetic acid (CDTA), succinic acid, tartaric acid or a combination thereof; and (iv) a solvent; wherein the one or more biochelants and the organophosphorus compound are present in a weight ratio of about 1:1.
  2. 2 . The method of claim 1 , wherein the one or more biochelants further comprises a counter-cation.
  3. 3 . The method of claim 2 , wherein the counter-cation comprises silicates, borates, aluminum, calcium, magnesium, ammonium, sodium, potassium, cesium, strontium or a combination thereof.
  4. 4 . The method of claim 1 , wherein R is a C 1 to C 20 compound.
  5. 5 . The method of claim 1 , wherein R is selected from the group consisting of a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, and an octyl group.
  6. 6 . The method of claim 1 , wherein the organophosphorus compound comprises tetrakis(hydroxymethyl)phosphonium sulfate (THPS), tetrakis(hydroxymethyl)phosphonium chloride (THPC), phospho salts, phosphonates, phosphate esters, polyphosphates, amino phosphates or a combination thereof.
  7. 7 . The method of claim 1 , wherein the solvent comprises an aqueous fluid.
  8. 8 . The method of claim 1 , wherein the surface is a wellbore formation matrix, a perforation, a tubular or other wellbore servicing equipment.
  9. 9 . The method of claim 1 , wherein the one or more biochelants comprise a glucarate, a gluconate, glucaric acid, gluconic acid, or a combination thereof.
  10. 10 . The method of claim 1 , wherein the organophosphorus compound comprises tetrakis(hydroxymethyl)phosphonium sulfate (THPS), tetrakis(hydroxymethyl)phosphonium chloride (THPC), or a combination thereof.
  11. 11 . The method of claim 1 , wherein the one or more biochelants are present in an amount from about 20 wt. % to about 40 wt. % by weight of the fluid.
  12. 12 . The method of claim 1 , wherein the one or more organophosphorus compounds are present in an amount from about 10 wt. % to about 30 wt. % by weight of the fluid.
  13. 13 . The method of claim 1 , wherein the enhancing chelant is present in an amount from about 5 wt. % to about 20 wt. % by weight of the fluid.
  14. 14 . The method of claim 1 , wherein the one or more biochelants and the one or more enhancing chelants are present in a ratio of about 1:1.
  15. 15 . A method of servicing a wellbore disposed in a subterranean formation, the method comprising: placing into the wellbore a fluid comprising: (i) a biochelant present in an amount from about 10 wt. % to about 70 wt. % by weight of the fluid, wherein the one or more biochelants comprise an aldonic acid, a uronic acid, an aldaric acid, a glucose oxidation product, a gluconic acid oxidation product, a glucarate, a gluconate, glucaric acid, gluconic acid, glucuronic acid, galactonic acid, galactaric acid, or a combination thereof; (ii) an organophosphorus compound present in an amount from about 10 wt. % to about 70 wt. % by weight of the fluid, wherein the organophosphorus compound is characterized by a general formula (OR) 4 P + [anion] where R is an alkyl group and the anion is monovalent; (iii) an enhancing chelant present in an amount from about 5 wt. % to about 40 wt. % by weight of the fluid, wherein the enhancing chelant comprises citric acid, ethylene diamine tetraacetic acid (EDTA), nitrilotriacetic acid (NTA), hydroxyethylidene diphosphonic acid (HEDTA), methylglycine N,N-diacetic acid trisodium salt (MGDA), N, N-dicarboxymethyl glutamic acid tetrasodium salt (GLDA), 1,10-phenanthroline, acetylacetone, aminomethylphosphonic acid, benzotriazole, benzoylacetone, bipyridine, 2,2′-bipyrimidine, 1,2-bis(dicyclohexylphosphino) ethane, 1,2-bis(dimethylphosphino) ethane, 1,2-bis(diphenylphosphino)benzene, 1,4-bis(diphenylphosphino) butane, 1,2-bis(diphenylphosphino)ethylene, bis(diphenylphosphinoethyl)phenylphosphine, 1,2-bis(diphenylphosphino) ethane, trans-1,2-diaminocyclohexane, 1,2-diaminopropane, tetramethylethylenediamine, 1,1,1-tris(diphenylphosphinomethyl) ethane, ethylenediamine-N,N′-disuccinic acid (EDDS), diethylenetriaminepentaacetic acid (DTPA), hydroxyethyliminodiacetate (HEIDA), 1,2-cyclohexylenedinitrilo tetraacetic acid (CDTA), succinic acid, tartaric acid or a combination thereof; and (iv) a solvent; for a time period sufficient to reduce a level of iron sulfide deposits by at least about 10%, wherein the biochelant and the organophosphorus compound are present in a weight ratio of about 1:1.
  16. 16 . The method of claim 15 , wherein the one or more biochelants comprise a glucarate, a gluconate, glucaric acid, gluconic acid, or a combination thereof, and wherein the organophosphorus compound comprises tetrakis(hydroxymethyl)phosphonium sulfate (THPS), tetrakis(hydroxymethyl)phosphonium chloride (THPC), or a combination thereof.
  17. 17 . The method of claim 15 , wherein the one or more biochelants are present in an amount from about 20 wt. % to about 40 wt. % by weight of the fluid.
  18. 18 . The method of claim 15 , wherein the one or more organophosphorus compounds are present in an amount from about 10 wt. % to about 30 wt. % by weight of the fluid.
  19. 19 . The method of claim 15 , wherein the enhancing chelant is present in an amount from about 5 wt. % to about 20 wt. % by weight of the fluid.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a 35 U.S.C. § 371 national stage application of PCT/US2022/026149 filed Apr. 25, 2022, entitled “COMPOSITIONS AND METHODS FOR THE DISSOLUTION OF IRON SULFIDE,” which claims priority to U.S. Provisional Application Ser. No. 63/179,164 filed Apr. 23, 2021 and entitled “COMPOSITIONS AND METHODS FOR THE DISSOLUTION OF IRON SULFIDE,” each of which is hereby incorporated herein by reference in its entirety for all purposes. TECHNICAL FIELD The present disclosure relates generally to compositions and methods for reducing contaminants arising in the performance of industrial processes. More specifically, the present disclosure relates to a compositions and methods for the dissolution of iron sulfide. SUMMARY Disclosed herein are embodiments of methods for reducing scale on a surface. In one embodiment, a method of reducing scale on a surface comprises contacting (i) one or more biochelants; (ii) one or more organophosphorus compound; (iii) an optional enhancer; and (iv) a solvent with the surface having one or more deposits comprising iron sulfide. Also disclosed herein are embodiments of compositions for reducing scale. In one embodiment, a composition comprises (i) a biochelant; (ii) an organophosphorus compound; (iii) an optional enhancer; and (iv) a solvent. Also disclosed herein are embodiments of methods for servicing a wellbore in a subterranean formation. In one embodiment, a method of servicing a wellbore disposed in a subterranean formation comprising placing into the wellbore a fluid comprising a biochelant; (ii) an organophosphorus compound; (iii) an optional enhancer and (iv) a solvent for a time period sufficient to reduce a level of iron sulfide deposits by at least about 10% wherein the optional enhancer comprises an amino alcohol. BACKGROUND During the production stage of a wellbore, fluids (e.g., gas, oily steam, hot water, etc.) are generally produced from the wellbore. As a result of the fluid-production, scale can develop in the wellbore, subterranean formation and/or on equipment associated with the wellbore, such as downhole equipment (e.g., casings, production tubing, mandrels, pipes, pumps, etc.) and surface equipment (e.g., pumps, heating turbines, heat exchangers, etc.). Hydrogen sulfide, H2S, is a naturally occurring contaminant of fluids that is encountered in industries such as the oil and gas industry. The corrosive nature of H2S may cause accumulation of particulate iron sulfide in the form of scale deposits on the surfaces of conduits such as pipelines. The physical characteristic of the iron sulfide scale deposits can vary from a viscous, oil coated mass to a dry black powder form. Because various chemical and physical conditions can contribute to the formation of iron sulfide scales, several forms can be found in a given section of a wellbore and a pipeline. It is seldom that a single type of iron sulfide scale exists; but more generally it is a mixture of iron sulfide scales, including pyrrhotite (F7S8), troilite (FeS), marcasite (FeS2), pyrite (FeS2), greigite (Fe2S4) and mackinawite (F9S8). BRIEF DESCRIPTION OF DRAWINGS For a detailed description of the aspects of the disclosed processes and systems, reference will now be made to the accompanying drawings in which: FIG. 1 is a depiction of a surface tubular with accumulated iron sulfide deposits. FIG. 2 is graph of green house gas emissions for samples from Example 1 when contacted with produced water. FIG. 3 is a plot of the amount of iron sequestered as a function of sample at initiation and after 24 hours. FIG. 4 is a plot of the iron sequestered as a function of sample components for the samples from Example 2. FIGS. 5 and 6 are plots iron sequestered as a function of the amount of citric acid in the samples from Example 3. FIG. 7 is a plot of the amount of iron sequestered as a function of sample composition. FIG. 8 is a depiction of the samples from Example 4 after a reaction time of 2.5 hours. DETAILED DESCRIPTION To define more clearly the terms used herein, the following definitions are provided. Unless otherwise indicated, the following definitions are applicable to this disclosure. If a term is used in this disclosure but is not specifically defined herein, the definition from the IUPAC Compendium of Chemical Terminology, 2nd Ed (1997) can be applied, as long as that definition does not conflict with any other disclosure or definition applied herein, or render indefinite or non-enabled any claim to which that definition is applied. To the extent that any definition or usage provided by any document incorporated herein by reference conflicts with the definition or usage provided herein, the definition or usage provided herein controls. Groups of elements of the periodic table are indicated using the numbering scheme indicated in the version of the periodic table of elements published in Chemical and Engineering News, 63 (5), 27, 1985. In some instances, a gro