Process and fluid to improve the permeability of sandstone formations using a chelating agent
AssigneeAkzo Nobel Chemicals International B.V.
InventorsHisham Nasr-El-Din, Cornelia Adriana De Wolf, Mohamed Ahmed Nasr-El-Din Mahmoud, Albertus Jacobus Maria Bouwman, Noble Thekkemelathethil George
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Abstract
The present invention relates to a process for treating a sandstone formation comprising introducing a fluid containing glutamic acid N,N-diacetic acid or a salt thereof (GLDA) and having a pH of between 1 and 14 into the formation. The invention in addition relates to a fluid and a kit of parts suitable for use in the above process containing glutamic acid N,N-diacetic acid or a salt thereof (GLDA), a corrosion inhibitor, a surfactant, and optionally a mutual solvent.
Claims22
Process for treating a sandstone formation comprising introducing a fluid containing glutamic acid N,N-diacetic acid or a salt thereof (GLDA) and having a pH of between 1 and 14 into the formation.
Kit of parts wherein one part comprises a fluid comprising glutamic acid N,N-diacetic acid or a salt thereof (GLDA), a corrosion inhibitor, and a surfactant, and the other part comprises a mutual solvent, or wherein one part comprises a fluid containing glutamic acid N,N-diacetic acid or a salt thereof (GLDA) and a corrosion inhibitor and the other part comprises a mutual solvent and a surfactant.
Dependencies are inferred from the claim text.