Composition Containing An Emulsified Chelating Agent And Process To Treat A Subterreanean Formation
US-2015141302-A1 · May 21, 2015 · US
Ammonium salts of chelating agents and their use in oil and gas field applications
US9587171B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9587171-B2 |
| Application number | US-201113993831-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 14, 2011 |
| Priority date | Dec 17, 2010 |
| Publication date | Mar 7, 2017 |
| Grant date | Mar 7, 2017 |
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Abstract
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The present invention relates to a process for treating a subterranean formation wherein a fluid containing an ammonium salt of glutamic acid N,N-diacetic acid (GLDA) or methylglycine N,N-diacetic acid (MGDA) is introduced into the formation. The invention also covers a fluid containing an ammonium salt of GLDA and/or MGDA and at least one component from the group of seawater, mutual solvents, anti-sludge agents, (water-wetting or emulsifying) surfactants, foaming agents, corrosion inhibitors corrosion inhibitor intensifiers, viscosifiers, wetting agents, diverting agents, oxygen scavengers, carrier fluids, fluid loss additives, friction reducers, stabilizers, rheology modifiers, gelling agents, scale inhibitors, breakers, salts, brines, pH control additives, bactericides/biocides, particulates, crosslinkers, salt substitutes (such as tetramethyl ammonium chloride), relative permeability modifiers, sulfide scavengers, fibres, nanoparticles, and consolidating agents, and covers an ammonium salt of the formula M x (NH 4 ) y H z -GLDA or the formula M x (NH 4 ) y H z -MGDA, wherein M is an alkalimetal cation, x is at least 0.1, y is at least 0.1 and x+y+z=4 for GLDA and x+y+z=3 for MGDA.
First claim
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The invention claimed is: 1. Process for treating a subterranean formation wherein a fluid comprising an ammonium salt of glutamic acid N,N-diacetic acid (GLDA) and/or methylglycine N,N-diacetic acid (MGDA) is introduced into the formation. 2. Process of claim 1 , wherein the fluid contains 5 to 50 wt% of an ammonium salt of GLDA and/or MGDA on the basis of the total weight of the fluid. 3. Process of claim 1 , wherein the fluid comprises an ammonium GLDA. 4. Process of claim 1 , wherein the subterranean formation is a carbonate or sandstone-containing formation. 5. Process of claim 1 , wherein the subterranean formation is accessed through seawater. 6. Process of claim 1 , wherein the temperature is between 77 and 400° F. (about 25 and 204° C.). 7. The process of claim 1 wherein the fluid further comprises at least one component selected from the group consisting of seawater, mutual solvents, anti-sludge agents, (water-wetting or emulsifying) surfactants, foaming agents, corrosion inhibitors, corrosion inhibitor intensifiers, viscosifiers, wetting agents, diverting agents, oxygen scavengers, carrier fluids, fluid loss additives, friction reducers, stabilizers, rheology modifiers, gelling agents, scale inhibitors, breakers, salts, brines, pH control additives, bactericides/biocides, particulates, crosslinkers, salt substitutes (such as tetramethyl ammonium chloride), relative permeability modifiers, sulfide scavengers, fibres, nanoparticles, and consolidating agents, wherein the fluid is suitable to treat a subterranean formation. 8. Process for treating a subterranean formation wherein a fluid comprising an ammonium salt of glutamic acid N,N-diacetic acid (GLDA) and/or methylglycine N,N-diacetic acid (MGDA) is introduced into the formation, the fluid having a pH≧3.2 and ≦10.2.
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- What does patent US9587171B2 cover?
- The present invention relates to a process for treating a subterranean formation wherein a fluid containing an ammonium salt of glutamic acid N,N-diacetic acid (GLDA) or methylglycine N,N-diacetic acid (MGDA) is introduced into the formation. The invention also covers a fluid containing an ammonium salt of GLDA and/or MGDA and at least one component from the group of seawater, mutual solvents, …
- Who is the assignee on this patent?
- De Wolf Cornelia Adriana, Lepage James N, Nasr-El-Din Hisham, and 4 more
- What technology area does this patent fall under?
- Primary CPC classification C09K8/86. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 07 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).