Akzo Nobel Chemicals International B.v.

Nouryon Chemicals International B.v.

Noble Thekkemelathethil George

Hisham Nasr-El-Din

Cornelia Adriana De Wolf

James N LePage

Edwin Rudolf Antony Bang

Mohamed Ahmed Nasr-El-Din Mahmoud

Albertus Jacobus Maria Bouwman

Albertus Jacobus Bouwman

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(NH)H-GLDA or the formula M(NH)H-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.

Ammonium salts of chelating agents and their use in oil and gas field applications

Growing community of inventors

College Station, TX, United States of America

Noble Thekkemelathethil George