Akzo Nobel Chemicals International B.v.

Nouryon Chemicals International B.v.

Estevao De Oliveira Barra

Hisham Nasr-El-Din

Cornelia Adriana De Wolf

Edwin Rudolf Antony Bang

Theodor Johannes Stanitzek

Mohammed Ali Ibrahim Sayed

Edwin Rudolf Bang

A two-step process to produce oil or gas from a subterranean formation wherein in a first step the subterranean formation is treated with an aqueous composition containing a chelating agent selected from the group of glutamic acid N,N-diacetic acid or a salt thereof (GLDA), aspartic acid N,N-diacetic acid or a salt thereof (ASDA), methylglycine N,N-diacetic acid or a salt thereof (MGDA), and N-hydroxyethyl ethylenediamine N,N',N&#x2032;-triacetic acid or a salt thereof (HEDTA) and wherein, in a next step, in the outlet streams from the subterranean formation the aqueous phase is separated from the non-aqueous phase.

Process to produce oil or gas from a subterranean formation using a chelating agent

The present invention relates to a process to treat a subterranean formation by introducing a composition containing between 1 and 40 wt % on total weight of the composition of a chelating agent selected from the group of glutamic acid N,N-diacetic acid or a salt thereof (GLDA), aspartic acid N,N-diacetic acid or a salt thereof (ASDA), and methylglycine N,N-diacetic acid or a salt thereof (MGDA) into the formation, wherein the process comprises a soaking step.

Process to treat subterranean formations using a chelating agent

Growing community of inventors

Deventer, Netherlands

Estevao De Oliveira Barra